/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:16:14,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:16:14,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:16:14,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:16:14,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:16:14,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:16:14,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:16:14,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:16:14,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:16:14,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:16:14,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:16:14,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:16:14,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:16:14,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:16:14,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:16:14,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:16:14,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:16:14,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:16:14,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:16:14,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:16:14,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:16:14,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:16:14,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:16:14,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:16:14,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:16:14,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:16:14,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:16:14,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:16:14,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:16:14,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:16:14,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:16:14,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:16:14,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:16:14,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:16:14,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:16:14,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:16:14,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:16:14,432 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:16:14,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:16:14,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:16:14,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:16:14,437 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:16:14,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:16:14,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:16:14,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:16:14,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:16:14,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:16:14,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:16:14,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:16:14,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:16:14,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:16:14,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:16:14,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:16:14,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:16:14,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:16:14,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:16:14,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:16:14,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:16:14,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:16:14,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:16:14,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:16:14,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:16:14,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:16:14,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:16:14,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:16:14,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:16:14,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:16:14,906 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:16:14,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-01-06 17:16:14,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f68deb2e/72c8d44b940246998de699ff1a9642b8/FLAGbde95b3e4 [2021-01-06 17:16:15,586 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:16:15,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-01-06 17:16:15,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f68deb2e/72c8d44b940246998de699ff1a9642b8/FLAGbde95b3e4 [2021-01-06 17:16:15,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1f68deb2e/72c8d44b940246998de699ff1a9642b8 [2021-01-06 17:16:15,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:16:15,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:16:15,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:15,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:16:15,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:16:15,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:15" (1/1) ... [2021-01-06 17:16:15,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1542cd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:15, skipping insertion in model container [2021-01-06 17:16:15,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:15" (1/1) ... [2021-01-06 17:16:15,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:16:16,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:16:16,237 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2021-01-06 17:16:16,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:16,296 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:16:16,314 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] left hand side expression in assignment: lhs: VariableLHS[~X~0,] left hand side expression in assignment: lhs: VariableLHS[~Y~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~xy~0,] left hand side expression in assignment: lhs: VariableLHS[~yx~0,] [2021-01-06 17:16:16,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:16,350 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:16:16,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16 WrapperNode [2021-01-06 17:16:16,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:16,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:16,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:16:16,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:16:16,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:16,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:16:16,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:16:16,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:16:16,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... [2021-01-06 17:16:16,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:16:16,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:16:16,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:16:16,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:16:16,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:16:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:16:16,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:16:16,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:16:16,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:16:16,777 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 17:16:16,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:16 BoogieIcfgContainer [2021-01-06 17:16:16,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:16:16,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:16:16,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:16:16,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:16:16,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:16:15" (1/3) ... [2021-01-06 17:16:16,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2279165c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:16, skipping insertion in model container [2021-01-06 17:16:16,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:16" (2/3) ... [2021-01-06 17:16:16,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2279165c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:16, skipping insertion in model container [2021-01-06 17:16:16,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:16" (3/3) ... [2021-01-06 17:16:16,788 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2021-01-06 17:16:16,831 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:16:16,856 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:16:16,879 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:16:16,904 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:16:16,904 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:16:16,904 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:16:16,904 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:16:16,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:16:16,905 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:16:16,905 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:16:16,905 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:16:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 17:16:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:16:16,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:16,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:16:16,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash 890461031, now seen corresponding path program 1 times [2021-01-06 17:16:16,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:16,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486175816] [2021-01-06 17:16:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:17,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486175816] [2021-01-06 17:16:17,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:17,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:16:17,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390483512] [2021-01-06 17:16:17,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:16:17,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:16:17,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:16:17,117 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2021-01-06 17:16:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:17,131 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-01-06 17:16:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:16:17,133 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 17:16:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:17,142 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:16:17,142 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 17:16:17,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:16:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 17:16:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 17:16:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 17:16:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 17:16:17,181 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-01-06 17:16:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:17,181 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 17:16:17,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:16:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 17:16:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:16:17,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:17,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:16:17,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:16:17,183 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-01-06 17:16:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:17,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800049564] [2021-01-06 17:16:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:17,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:17,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892077867] [2021-01-06 17:16:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:16:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:17,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800049564] [2021-01-06 17:16:17,363 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:17,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892077867] [2021-01-06 17:16:17,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:17,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:16:17,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818198434] [2021-01-06 17:16:17,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:16:17,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:17,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:16:17,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:16:17,369 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2021-01-06 17:16:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:17,489 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-01-06 17:16:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:16:17,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 17:16:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:17,496 INFO L225 Difference]: With dead ends: 30 [2021-01-06 17:16:17,497 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:16:17,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:16:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:16:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2021-01-06 17:16:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:16:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 17:16:17,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2021-01-06 17:16:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:17,511 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 17:16:17,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:16:17,512 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 17:16:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:16:17,513 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:17,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:17,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:16:17,717 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1545533000, now seen corresponding path program 1 times [2021-01-06 17:16:17,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:17,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311361810] [2021-01-06 17:16:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:17,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:17,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149288367] [2021-01-06 17:16:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:16:17,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:18,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311361810] [2021-01-06 17:16:18,041 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:18,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149288367] [2021-01-06 17:16:18,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:18,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:18,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785715946] [2021-01-06 17:16:18,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:18,047 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2021-01-06 17:16:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:18,219 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-01-06 17:16:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:18,220 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 17:16:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:18,221 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:16:18,221 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:16:18,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:16:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-01-06 17:16:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:16:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 17:16:18,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-01-06 17:16:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:18,229 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 17:16:18,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 17:16:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:16:18,231 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:18,231 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:18,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:18,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1602791302, now seen corresponding path program 1 times [2021-01-06 17:16:18,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:18,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921933275] [2021-01-06 17:16:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:18,474 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:18,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477564223] [2021-01-06 17:16:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:18,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:16:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:18,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921933275] [2021-01-06 17:16:18,681 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:18,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477564223] [2021-01-06 17:16:18,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:18,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:18,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722268529] [2021-01-06 17:16:18,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:18,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:18,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:18,686 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2021-01-06 17:16:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:18,845 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-01-06 17:16:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:16:18,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 17:16:18,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:18,848 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:16:18,848 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:16:18,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:16:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-01-06 17:16:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:16:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 17:16:18,865 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 12 [2021-01-06 17:16:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:18,865 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 17:16:18,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 17:16:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:16:18,867 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:18,867 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:19,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:19,081 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash -666919436, now seen corresponding path program 1 times [2021-01-06 17:16:19,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:19,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580821725] [2021-01-06 17:16:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:19,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:19,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055133924] [2021-01-06 17:16:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:19,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:16:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:19,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580821725] [2021-01-06 17:16:19,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:19,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055133924] [2021-01-06 17:16:19,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:19,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 17:16:19,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76868498] [2021-01-06 17:16:19,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:16:19,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:19,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:16:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:16:19,202 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 17:16:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:19,228 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-01-06 17:16:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:16:19,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-06 17:16:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:19,229 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:16:19,230 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:16:19,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:16:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:16:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:16:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:16:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-06 17:16:19,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 13 [2021-01-06 17:16:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:19,236 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-06 17:16:19,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:16:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-06 17:16:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:16:19,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:19,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:19,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:19,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -919296115, now seen corresponding path program 1 times [2021-01-06 17:16:19,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:19,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674993873] [2021-01-06 17:16:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:19,478 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:19,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712442275] [2021-01-06 17:16:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:19,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:16:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:19,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674993873] [2021-01-06 17:16:19,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:19,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712442275] [2021-01-06 17:16:19,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:19,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:19,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308497593] [2021-01-06 17:16:19,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:19,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:19,747 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 11 states. [2021-01-06 17:16:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:20,008 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-01-06 17:16:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:16:20,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 17:16:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:20,009 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:16:20,010 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:16:20,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:16:20,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:16:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2021-01-06 17:16:20,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 17:16:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-01-06 17:16:20,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-01-06 17:16:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:20,016 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-01-06 17:16:20,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-01-06 17:16:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:16:20,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:20,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-01-06 17:16:20,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:16:20,232 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -443375322, now seen corresponding path program 2 times [2021-01-06 17:16:20,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:20,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121280633] [2021-01-06 17:16:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:20,247 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635573697] [2021-01-06 17:16:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:20,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:16:20,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121280633] [2021-01-06 17:16:20,594 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635573697] [2021-01-06 17:16:20,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:20,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:20,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036320253] [2021-01-06 17:16:20,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:20,597 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 11 states. [2021-01-06 17:16:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:20,851 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-01-06 17:16:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:20,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2021-01-06 17:16:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:20,852 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:16:20,853 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 17:16:20,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 17:16:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-01-06 17:16:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 17:16:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-01-06 17:16:20,859 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2021-01-06 17:16:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:20,860 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-01-06 17:16:20,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-01-06 17:16:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:16:20,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:20,861 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:21,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:21,077 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -500633624, now seen corresponding path program 1 times [2021-01-06 17:16:21,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:21,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991260000] [2021-01-06 17:16:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:21,092 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:21,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902259229] [2021-01-06 17:16:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:16:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:21,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:16:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:21,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991260000] [2021-01-06 17:16:21,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:21,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902259229] [2021-01-06 17:16:21,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:16:21,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:21,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:16:21,482 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:16:21,482 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:16:21,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:21,719 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:16:21,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:16:21 BoogieIcfgContainer [2021-01-06 17:16:21,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:16:21,720 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:16:21,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:16:21,720 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:16:21,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:16" (3/4) ... [2021-01-06 17:16:21,725 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:16:21,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:16:21,727 INFO L168 Benchmark]: Toolchain (without parser) took 5770.20 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 139.4 MB in the beginning and 146.8 MB in the end (delta: -7.4 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:21,728 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory was 136.5 MB in the beginning and 136.4 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:21,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.79 ms. Allocated memory is still 163.6 MB. Free memory was 139.3 MB in the beginning and 129.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:21,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.58 ms. Allocated memory is still 163.6 MB. Free memory was 129.2 MB in the beginning and 127.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:21,731 INFO L168 Benchmark]: Boogie Preprocessor took 25.80 ms. Allocated memory is still 163.6 MB. Free memory was 127.7 MB in the beginning and 126.7 MB in the end (delta: 995.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:21,731 INFO L168 Benchmark]: RCFGBuilder took 350.24 ms. Allocated memory is still 163.6 MB. Free memory was 126.7 MB in the beginning and 113.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:21,732 INFO L168 Benchmark]: TraceAbstraction took 4939.03 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 113.1 MB in the beginning and 147.3 MB in the end (delta: -34.2 MB). Peak memory consumption was 27.3 kB. Max. memory is 8.0 GB. [2021-01-06 17:16:21,733 INFO L168 Benchmark]: Witness Printer took 4.78 ms. Allocated memory is still 197.1 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:21,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 163.6 MB. Free memory was 136.5 MB in the beginning and 136.4 MB in the end (delta: 77.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 390.79 ms. Allocated memory is still 163.6 MB. Free memory was 139.3 MB in the beginning and 129.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.58 ms. Allocated memory is still 163.6 MB. Free memory was 129.2 MB in the beginning and 127.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.80 ms. Allocated memory is still 163.6 MB. Free memory was 127.7 MB in the beginning and 126.7 MB in the end (delta: 995.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 350.24 ms. Allocated memory is still 163.6 MB. Free memory was 126.7 MB in the beginning and 113.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4939.03 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 113.1 MB in the beginning and 147.3 MB in the end (delta: -34.2 MB). Peak memory consumption was 27.3 kB. Max. memory is 8.0 GB. * Witness Printer took 4.78 ms. Allocated memory is still 197.1 MB. Free memory is still 146.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 [L31] EXPR counter++ [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ [L31] EXPR counter++ [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ [L31] EXPR counter++ [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 94 SDslu, 254 SDs, 0 SdLazy, 394 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 41 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 11548 SizeOfPredicates, 66 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...