/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/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:44:12,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:44:12,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:44:12,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:44:12,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:44:12,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:44:12,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:44:12,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:44:12,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:44:12,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:44:12,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:44:12,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:44:12,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:44:12,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:44:12,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:44:12,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:44:12,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:44:12,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:44:12,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:44:12,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:44:12,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:44:12,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:44:12,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:44:12,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:44:12,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:44:12,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:44:12,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:44:12,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:44:12,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:44:12,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:44:12,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:44:12,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:44:12,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:44:12,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:44:12,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:44:12,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:44:12,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:44:12,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:44:12,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:44:12,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:44:12,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:44:12,350 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 20:44:12,370 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:44:12,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:44:12,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:44:12,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:44:12,372 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:44:12,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:44:12,373 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:44:12,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:44:12,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:44:12,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:44:12,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:44:12,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:44:12,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:44:12,375 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:44:12,376 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:44:12,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:44:12,376 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:44:12,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:44:12,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:44:12,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:44:12,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:44:12,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:44:12,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:44:12,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:44:12,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:44:12,378 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:44:12,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:44:12,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:44:12,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:44:12,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:44:12,641 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:44:12,659 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:44:12,663 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:44:12,665 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:44:12,665 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:44:12,666 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/transpose-u.c [2019-11-23 20:44:12,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1053c623/fc7f40ef58164ca39030b9113a2dd972/FLAGf6aaf3538 [2019-11-23 20:44:13,202 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:44:13,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/transpose-u.c [2019-11-23 20:44:13,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1053c623/fc7f40ef58164ca39030b9113a2dd972/FLAGf6aaf3538 [2019-11-23 20:44:13,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1053c623/fc7f40ef58164ca39030b9113a2dd972 [2019-11-23 20:44:13,607 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:44:13,608 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:44:13,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:13,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:44:13,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:44:13,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:13,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bf5d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13, skipping insertion in model container [2019-11-23 20:44:13,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:13,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:44:13,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:44:13,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:13,824 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:44:13,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:44:13,961 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:44:13,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13 WrapperNode [2019-11-23 20:44:13,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:44:13,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:13,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:44:13,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:44:13,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:13,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:44:14,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:44:14,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:44:14,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:44:14,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (1/1) ... [2019-11-23 20:44:14,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:44:14,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:44:14,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:44:14,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:44:14,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (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 20:44:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:44:14,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:44:14,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:44:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:44:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:44:14,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:44:14,391 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:44:14,391 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:44:14,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:14 BoogieIcfgContainer [2019-11-23 20:44:14,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:44:14,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:44:14,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:44:14,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:44:14,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:44:13" (1/3) ... [2019-11-23 20:44:14,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed410bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:14, skipping insertion in model container [2019-11-23 20:44:14,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:44:13" (2/3) ... [2019-11-23 20:44:14,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed410bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:44:14, skipping insertion in model container [2019-11-23 20:44:14,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:44:14" (3/3) ... [2019-11-23 20:44:14,403 INFO L109 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2019-11-23 20:44:14,420 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:44:14,428 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:44:14,453 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:44:14,475 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:44:14,476 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:44:14,476 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:44:14,476 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:44:14,476 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:44:14,476 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:44:14,476 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:44:14,477 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:44:14,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:44:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:44:14,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:14,499 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:14,500 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash 74794164, now seen corresponding path program 1 times [2019-11-23 20:44:14,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:14,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444431856] [2019-11-23 20:44:14,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:14,584 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:14,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557629211] [2019-11-23 20:44:14,585 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 20:44:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:14,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:14,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:14,706 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 20:44:14,706 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444431856] [2019-11-23 20:44:14,707 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:14,707 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557629211] [2019-11-23 20:44:14,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:14,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:44:14,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175042119] [2019-11-23 20:44:14,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:44:14,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:44:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:44:14,731 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-23 20:44:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:14,811 INFO L93 Difference]: Finished difference Result 48 states and 76 transitions. [2019-11-23 20:44:14,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:44:14,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:44:14,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:14,825 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:44:14,825 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:44:14,829 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 20:44:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:44:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-23 20:44:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:44:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 20:44:14,871 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2019-11-23 20:44:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:14,871 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 20:44:14,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:44:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 20:44:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:44:14,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:14,873 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:15,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:15,079 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash 876166624, now seen corresponding path program 1 times [2019-11-23 20:44:15,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:15,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67084765] [2019-11-23 20:44:15,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:15,087 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:15,087 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452942225] [2019-11-23 20:44:15,088 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 20:44:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:15,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:15,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:15,161 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 20:44:15,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67084765] [2019-11-23 20:44:15,162 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:15,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452942225] [2019-11-23 20:44:15,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:15,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:44:15,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853224487] [2019-11-23 20:44:15,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:44:15,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:44:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:44:15,166 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-23 20:44:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:15,258 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2019-11-23 20:44:15,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:15,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:44:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:15,261 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:44:15,261 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:44:15,262 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 20:44:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:44:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2019-11-23 20:44:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:44:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:44:15,271 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2019-11-23 20:44:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:15,271 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:44:15,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:44:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:44:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:44:15,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:15,272 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:15,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:15,477 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:15,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1798277150, now seen corresponding path program 1 times [2019-11-23 20:44:15,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:15,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893130329] [2019-11-23 20:44:15,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:15,483 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:15,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52750305] [2019-11-23 20:44:15,484 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 20:44:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:15,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:44:15,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:15,560 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 20:44:15,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893130329] [2019-11-23 20:44:15,561 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:15,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52750305] [2019-11-23 20:44:15,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:15,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:44:15,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788957852] [2019-11-23 20:44:15,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:44:15,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:44:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:44:15,564 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2019-11-23 20:44:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:15,661 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2019-11-23 20:44:15,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:44:15,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 20:44:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:15,662 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:44:15,663 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:44:15,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 20:44:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:44:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2019-11-23 20:44:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:44:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-23 20:44:15,671 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2019-11-23 20:44:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:15,672 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-23 20:44:15,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:44:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-23 20:44:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:44:15,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:15,673 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:15,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:15,878 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 746666340, now seen corresponding path program 2 times [2019-11-23 20:44:15,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:15,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186009062] [2019-11-23 20:44:15,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:15,887 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:15,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68805820] [2019-11-23 20:44:15,888 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 20:44:15,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:44:15,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:15,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:44:15,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:44:15,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186009062] [2019-11-23 20:44:15,964 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:15,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68805820] [2019-11-23 20:44:15,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:44:15,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:44:15,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120891629] [2019-11-23 20:44:15,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:44:15,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:44:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:44:15,966 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2019-11-23 20:44:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:16,044 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2019-11-23 20:44:16,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:44:16,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:44:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:16,045 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:44:16,045 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:44:16,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:44:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:44:16,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2019-11-23 20:44:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:44:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-23 20:44:16,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2019-11-23 20:44:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:16,054 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-23 20:44:16,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:44:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-23 20:44:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:44:16,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:16,055 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:16,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:16,270 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:16,270 INFO L82 PathProgramCache]: Analyzing trace with hash 528247649, now seen corresponding path program 1 times [2019-11-23 20:44:16,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:16,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908254978] [2019-11-23 20:44:16,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:16,279 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:16,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903493769] [2019-11-23 20:44:16,279 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 20:44:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:44:16,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:44:16,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:44:16,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908254978] [2019-11-23 20:44:16,356 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:16,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903493769] [2019-11-23 20:44:16,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:16,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:44:16,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119908971] [2019-11-23 20:44:16,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:44:16,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:44:16,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:44:16,358 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2019-11-23 20:44:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:16,464 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-23 20:44:16,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:44:16,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-23 20:44:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:16,465 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:44:16,465 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:44:16,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 20:44:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:44:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2019-11-23 20:44:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:44:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-23 20:44:16,486 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2019-11-23 20:44:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:16,488 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-23 20:44:16,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:44:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-23 20:44:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:44:16,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:16,489 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:16,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:16,690 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1276111829, now seen corresponding path program 2 times [2019-11-23 20:44:16,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:16,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080163001] [2019-11-23 20:44:16,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:16,696 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:16,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473679155] [2019-11-23 20:44:16,697 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 20:44:16,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:44:16,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:16,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:44:16,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:44:16,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080163001] [2019-11-23 20:44:16,803 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:16,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473679155] [2019-11-23 20:44:16,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:16,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:44:16,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391001361] [2019-11-23 20:44:16,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:44:16,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:44:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:44:16,806 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2019-11-23 20:44:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:16,905 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2019-11-23 20:44:16,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:44:16,905 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-23 20:44:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:16,906 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:44:16,906 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:44:16,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 20:44:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:44:16,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2019-11-23 20:44:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:44:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-11-23 20:44:16,915 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2019-11-23 20:44:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:16,915 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-11-23 20:44:16,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:44:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-11-23 20:44:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:44:16,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:16,917 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:17,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:17,123 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2013197213, now seen corresponding path program 3 times [2019-11-23 20:44:17,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:17,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82282793] [2019-11-23 20:44:17,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:17,130 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:17,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156442439] [2019-11-23 20:44:17,131 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 20:44:17,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:44:17,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:17,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:44:17,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:44:17,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82282793] [2019-11-23 20:44:17,219 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:17,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156442439] [2019-11-23 20:44:17,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:17,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:44:17,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29495812] [2019-11-23 20:44:17,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:44:17,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:17,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:44:17,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:44:17,221 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 5 states. [2019-11-23 20:44:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:17,316 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2019-11-23 20:44:17,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:44:17,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-23 20:44:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:17,319 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:44:17,320 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:44:17,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 20:44:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:44:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2019-11-23 20:44:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:44:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2019-11-23 20:44:17,333 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2019-11-23 20:44:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:17,334 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2019-11-23 20:44:17,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:44:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2019-11-23 20:44:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:44:17,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:17,336 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:17,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:17,539 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2132369004, now seen corresponding path program 4 times [2019-11-23 20:44:17,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:17,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86674969] [2019-11-23 20:44:17,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:17,547 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:17,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242399516] [2019-11-23 20:44:17,548 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 20:44:17,606 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:44:17,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:44:17,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:44:17,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:44:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-23 20:44:17,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86674969] [2019-11-23 20:44:17,723 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:44:17,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242399516] [2019-11-23 20:44:17,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:44:17,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:44:17,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79641084] [2019-11-23 20:44:17,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:44:17,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:44:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:44:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:44:17,726 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 10 states. [2019-11-23 20:44:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:44:17,960 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2019-11-23 20:44:17,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:44:17,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-11-23 20:44:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:44:17,962 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:44:17,963 INFO L226 Difference]: Without dead ends: 166 [2019-11-23 20:44:17,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:44:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-23 20:44:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 81. [2019-11-23 20:44:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:44:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2019-11-23 20:44:17,976 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 46 [2019-11-23 20:44:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:44:17,977 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2019-11-23 20:44:17,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:44:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2019-11-23 20:44:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:44:17,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:44:17,979 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:44:18,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:44:18,183 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:44:18,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:44:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1584178365, now seen corresponding path program 5 times [2019-11-23 20:44:18,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:44:18,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695022509] [2019-11-23 20:44:18,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:44:18,190 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:44:18,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559919711] [2019-11-23 20:44:18,190 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