/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:16:26,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:16:26,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:16:26,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:16:26,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:16:26,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:16:26,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:16:26,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:16:26,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:16:26,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:16:26,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:16:26,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:16:26,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:16:26,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:16:26,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:16:26,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:16:26,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:16:26,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:16:26,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:16:26,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:16:26,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:16:26,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:16:26,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:16:26,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:16:26,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 17:16:26,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 17:16:26,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 17:16:26,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 17:16:26,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 17:16:26,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 17:16:26,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:16:26,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:16:26,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:16:26,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:16:26,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:16:26,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:16:26,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:16:26,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:16:26,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:16:26,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:16:26,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:16:26,426 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 17:16:26,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:16:26,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:16:26,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:16:26,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:16:26,478 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:16:26,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:16:26,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:16:26,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:16:26,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:16:26,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:16:26,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:16:26,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:16:26,480 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:16:26,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:16:26,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:16:26,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:16:26,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:16:26,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:16:26,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:16:26,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:16:26,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:16:26,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:16:26,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:16:26,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:16:26,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:16:26,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:16:26,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:16:26,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:16:26,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:16:26,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:16:26,863 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:16:26,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-01-06 17:16:26,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e192d1a98/8712ad52bf4340689957835e6d2538a4/FLAG52fe1c836 [2021-01-06 17:16:27,551 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:16:27,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-01-06 17:16:27,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e192d1a98/8712ad52bf4340689957835e6d2538a4/FLAG52fe1c836 [2021-01-06 17:16:27,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e192d1a98/8712ad52bf4340689957835e6d2538a4 [2021-01-06 17:16:27,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:16:27,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:16:27,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:27,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:16:27,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:16:27,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:27" (1/1) ... [2021-01-06 17:16:27,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f4822d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:27, skipping insertion in model container [2021-01-06 17:16:27,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:16:27" (1/1) ... [2021-01-06 17:16:27,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:16:27,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:16:28,125 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_valuebound20.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 17:16:28,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:28,158 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:16:28,173 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_valuebound20.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 17:16:28,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:16:28,198 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:16:28,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28 WrapperNode [2021-01-06 17:16:28,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:16:28,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:28,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:16:28,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:16:28,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:16:28,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:16:28,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:16:28,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:16:28,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (1/1) ... [2021-01-06 17:16:28,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:16:28,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:16:28,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:16:28,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:16:28,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (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 17:16:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:16:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:16:28,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:16:28,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:16:28,861 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:16:28,862 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:16:28,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:28 BoogieIcfgContainer [2021-01-06 17:16:28,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:16:28,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:16:28,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:16:28,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:16:28,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:16:27" (1/3) ... [2021-01-06 17:16:28,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6e36a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:28, skipping insertion in model container [2021-01-06 17:16:28,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:16:28" (2/3) ... [2021-01-06 17:16:28,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6e36a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:16:28, skipping insertion in model container [2021-01-06 17:16:28,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:28" (3/3) ... [2021-01-06 17:16:28,875 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.c [2021-01-06 17:16:28,884 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:16:28,889 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 17:16:28,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 17:16:28,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:16:28,940 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:16:28,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:16:28,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:16:28,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:16:28,941 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:16:28,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:16:28,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:16:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:16:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:16:28,962 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:28,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:28,963 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:28,971 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-01-06 17:16:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:28,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034376479] [2021-01-06 17:16:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:29,170 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 17:16:29,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034376479] [2021-01-06 17:16:29,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:29,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:16:29,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17696874] [2021-01-06 17:16:29,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:16:29,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:29,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:16:29,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:16:29,195 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:16:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:29,214 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-01-06 17:16:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:16:29,215 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 17:16:29,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:29,224 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:16:29,224 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:16:29,227 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 17:16:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:16:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:16:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:16:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:16:29,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-01-06 17:16:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:29,263 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:16:29,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:16:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:16:29,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:16:29,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:29,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:29,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:16:29,264 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-01-06 17:16:29,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:29,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806795903] [2021-01-06 17:16:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:29,295 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:29,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693790495] [2021-01-06 17:16:29,296 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 17:16:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:16:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:29,526 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 17:16:29,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806795903] [2021-01-06 17:16:29,527 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:29,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693790495] [2021-01-06 17:16:29,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:29,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 17:16:29,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157820621] [2021-01-06 17:16:29,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:16:29,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:16:29,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:16:29,532 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2021-01-06 17:16:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:29,679 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 17:16:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:29,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:16:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:29,681 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:16:29,681 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:16:29,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:16:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:16:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-01-06 17:16:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:16:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 17:16:29,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2021-01-06 17:16:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:29,689 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 17:16:29,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:16:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 17:16:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:16:29,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:29,690 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:29,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:16:29,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-01-06 17:16:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:29,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024338831] [2021-01-06 17:16:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:29,925 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:29,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798894289] [2021-01-06 17:16:29,925 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 17:16:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:16:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:30,119 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 17:16:30,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024338831] [2021-01-06 17:16:30,120 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:30,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798894289] [2021-01-06 17:16:30,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:30,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:30,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371333711] [2021-01-06 17:16:30,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:30,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:30,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:30,123 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2021-01-06 17:16:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:30,299 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-01-06 17:16:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:16:30,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:16:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:30,301 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:16:30,301 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:16:30,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:16:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:16:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-01-06 17:16:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:16:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:16:30,308 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2021-01-06 17:16:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:30,309 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:16:30,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:16:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:16:30,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:30,310 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:30,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:30,524 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:30,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-01-06 17:16:30,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:30,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752340855] [2021-01-06 17:16:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:30,551 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:30,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402245645] [2021-01-06 17:16:30,552 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 17:16:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:16:30,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:30,762 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 17:16:30,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752340855] [2021-01-06 17:16:30,763 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:30,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402245645] [2021-01-06 17:16:30,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:30,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:16:30,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719160061] [2021-01-06 17:16:30,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:16:30,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:16:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:16:30,765 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2021-01-06 17:16:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:30,953 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-01-06 17:16:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:30,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 17:16:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:30,955 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:16:30,955 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 17:16:30,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:16:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 17:16:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2021-01-06 17:16:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:16:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:16:30,961 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-01-06 17:16:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:30,962 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:16:30,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:16:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:16:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 17:16:30,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:30,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:31,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:31,177 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-01-06 17:16:31,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:31,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318445527] [2021-01-06 17:16:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:31,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:31,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866987630] [2021-01-06 17:16:31,195 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 17:16:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:16:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:31,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:31,510 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 17:16:31,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318445527] [2021-01-06 17:16:31,511 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:31,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866987630] [2021-01-06 17:16:31,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:31,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:31,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246117502] [2021-01-06 17:16:31,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:31,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:31,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:31,514 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2021-01-06 17:16:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:31,784 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-01-06 17:16:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:31,784 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2021-01-06 17:16:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:31,785 INFO L225 Difference]: With dead ends: 37 [2021-01-06 17:16:31,786 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:16:31,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:16:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-01-06 17:16:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:16:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:16:31,792 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2021-01-06 17:16:31,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:31,792 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:16:31,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:16:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:31,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:31,793 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:32,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:32,007 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1508067884, now seen corresponding path program 2 times [2021-01-06 17:16:32,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:32,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264031065] [2021-01-06 17:16:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:32,037 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:32,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197358275] [2021-01-06 17:16:32,039 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 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 17:16:32,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:32,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:16:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264031065] [2021-01-06 17:16:32,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197358275] [2021-01-06 17:16:32,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:32,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:32,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232655542] [2021-01-06 17:16:32,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:32,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:32,302 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2021-01-06 17:16:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:32,572 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-06 17:16:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:32,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 17:16:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:32,574 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:16:32,574 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:16:32,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:16:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:16:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-01-06 17:16:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:16:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 17:16:32,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2021-01-06 17:16:32,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:32,582 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 17:16:32,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 17:16:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:32,584 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:32,584 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:32,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 17:16:32,800 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:32,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1506220842, now seen corresponding path program 1 times [2021-01-06 17:16:32,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:32,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21875294] [2021-01-06 17:16:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:32,814 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:32,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756878811] [2021-01-06 17:16:32,815 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 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 17:16:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:16:32,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21875294] [2021-01-06 17:16:33,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:33,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756878811] [2021-01-06 17:16:33,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:33,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 17:16:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840309136] [2021-01-06 17:16:33,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:16:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:33,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:16:33,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:16:33,078 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2021-01-06 17:16:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:33,330 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-01-06 17:16:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:16:33,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2021-01-06 17:16:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:33,332 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:16:33,332 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:16:33,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:16:33,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:16:33,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-01-06 17:16:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:33,339 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-01-06 17:16:33,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:33,340 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:33,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:16:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:33,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:33,341 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:33,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:33,555 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 2 times [2021-01-06 17:16:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:33,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093081226] [2021-01-06 17:16:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:33,572 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:33,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873374108] [2021-01-06 17:16:33,573 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 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 17:16:33,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:33,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 17:16:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:16:33,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093081226] [2021-01-06 17:16:33,732 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:33,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873374108] [2021-01-06 17:16:33,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:33,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:33,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625286140] [2021-01-06 17:16:33,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:33,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:33,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:33,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:33,734 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2021-01-06 17:16:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:37,870 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-01-06 17:16:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:16:37,871 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-01-06 17:16:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:37,872 INFO L225 Difference]: With dead ends: 41 [2021-01-06 17:16:37,872 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:16:37,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:16:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-01-06 17:16:37,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:16:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-01-06 17:16:37,881 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2021-01-06 17:16:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:37,882 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-01-06 17:16:37,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-01-06 17:16:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 17:16:37,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:37,883 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:38,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:38,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:38,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-01-06 17:16:38,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:38,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978553416] [2021-01-06 17:16:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:38,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:38,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518030277] [2021-01-06 17:16:38,121 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 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 [2021-01-06 17:16:38,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:38,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:16:38,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:38,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978553416] [2021-01-06 17:16:38,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:38,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518030277] [2021-01-06 17:16:38,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:38,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 17:16:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650017665] [2021-01-06 17:16:38,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:16:38,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:38,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:16:38,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:16:38,364 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2021-01-06 17:16:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:38,626 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-01-06 17:16:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:16:38,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2021-01-06 17:16:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:38,629 INFO L225 Difference]: With dead ends: 53 [2021-01-06 17:16:38,629 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:16:38,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:16:38,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:16:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-01-06 17:16:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:38,650 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 19 [2021-01-06 17:16:38,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:38,652 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:38,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:16:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:38,654 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:38,654 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:38,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 17:16:38,869 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1998111260, now seen corresponding path program 1 times [2021-01-06 17:16:38,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:38,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438399409] [2021-01-06 17:16:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:38,883 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:38,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759004601] [2021-01-06 17:16:38,884 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 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 [2021-01-06 17:16:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:16:38,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:16:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438399409] [2021-01-06 17:16:39,079 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759004601] [2021-01-06 17:16:39,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:39,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:39,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876164326] [2021-01-06 17:16:39,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:39,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:39,081 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-01-06 17:16:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:39,191 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 17:16:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:16:39,191 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:16:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:39,194 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:16:39,194 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:16:39,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:16:39,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-01-06 17:16:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:39,219 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-01-06 17:16:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:39,219 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:39,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:39,225 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:39,225 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:39,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:39,440 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2074315424, now seen corresponding path program 2 times [2021-01-06 17:16:39,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:39,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943982296] [2021-01-06 17:16:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:39,457 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:39,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354511465] [2021-01-06 17:16:39,460 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:39,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:39,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:39,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:16:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:16:39,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943982296] [2021-01-06 17:16:39,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:39,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354511465] [2021-01-06 17:16:39,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:16:39,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:16:39,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279604215] [2021-01-06 17:16:39,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:16:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:16:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:16:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:39,662 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2021-01-06 17:16:39,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:16:39,781 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-01-06 17:16:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:16:39,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-01-06 17:16:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:16:39,786 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:16:39,786 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 17:16:39,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:16:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 17:16:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-01-06 17:16:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:16:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 17:16:39,804 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-01-06 17:16:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:16:39,804 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 17:16:39,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:16:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 17:16:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:16:39,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:16:39,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:16:40,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:40,026 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:16:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:16:40,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-01-06 17:16:40,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:16:40,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025742409] [2021-01-06 17:16:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:16:40,038 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:16:40,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017132096] [2021-01-06 17:16:40,039 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:16:40,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:16:40,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:16:40,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 17:16:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:16:40,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:40,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:16:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025742409] [2021-01-06 17:16:40,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:16:40,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017132096] [2021-01-06 17:16:40,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2021-01-06 17:16:40,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:16:40,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-06 17:16:40,533 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-06 17:16:40,533 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 17:16:40,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 17:16:40,768 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-06 17:16:40,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 05:16:40 BoogieIcfgContainer [2021-01-06 17:16:40,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 17:16:40,769 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 17:16:40,769 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 17:16:40,769 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 17:16:40,770 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:16:28" (3/4) ... [2021-01-06 17:16:40,773 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-06 17:16:40,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 17:16:40,775 INFO L168 Benchmark]: Toolchain (without parser) took 12859.54 ms. Allocated memory was 159.4 MB in the beginning and 235.9 MB in the end (delta: 76.5 MB). Free memory was 115.8 MB in the beginning and 174.5 MB in the end (delta: -58.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:40,776 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 132.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:40,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.95 ms. Allocated memory is still 159.4 MB. Free memory was 115.7 MB in the beginning and 134.3 MB in the end (delta: -18.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:40,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 159.4 MB. Free memory was 134.3 MB in the beginning and 132.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:40,779 INFO L168 Benchmark]: Boogie Preprocessor took 23.38 ms. Allocated memory is still 159.4 MB. Free memory was 132.6 MB in the beginning and 131.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:40,780 INFO L168 Benchmark]: RCFGBuilder took 597.67 ms. Allocated memory is still 159.4 MB. Free memory was 131.6 MB in the beginning and 129.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:40,781 INFO L168 Benchmark]: TraceAbstraction took 11902.92 ms. Allocated memory was 159.4 MB in the beginning and 235.9 MB in the end (delta: 76.5 MB). Free memory was 129.2 MB in the beginning and 174.5 MB in the end (delta: -45.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. [2021-01-06 17:16:40,781 INFO L168 Benchmark]: Witness Printer took 4.13 ms. Allocated memory is still 235.9 MB. Free memory is still 174.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 17:16:40,787 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 159.4 MB. Free memory is still 132.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.95 ms. Allocated memory is still 159.4 MB. Free memory was 115.7 MB in the beginning and 134.3 MB in the end (delta: -18.6 MB). Peak memory consumption was 7.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.22 ms. Allocated memory is still 159.4 MB. Free memory was 134.3 MB in the beginning and 132.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.38 ms. Allocated memory is still 159.4 MB. Free memory was 132.6 MB in the beginning and 131.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 597.67 ms. Allocated memory is still 159.4 MB. Free memory was 131.6 MB in the beginning and 129.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11902.92 ms. Allocated memory was 159.4 MB in the beginning and 235.9 MB in the end (delta: 76.5 MB). Free memory was 129.2 MB in the beginning and 174.5 MB in the end (delta: -45.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. * Witness Printer took 4.13 ms. Allocated memory is still 235.9 MB. Free memory is still 174.5 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: [L22] int X, Y; [L23] long long x, y, v, xy, yx; [L24] X = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L26] Y = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L28] v = ((long long) 2 * Y) - X [L29] y = 0 [L30] x = 0 [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND FALSE !(v < 0) [L43] v = v + 2 * ((long long) Y - X) [L44] y++ [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND FALSE !(!(x <= X)) [L40] COND FALSE !(v < 0) [L43] v = v + 2 * ((long long) Y - X) [L44] y++ [L46] x++ [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L14] COND FALSE !(!(cond)) [L36] COND TRUE !(x <= X) [L48] xy = (long long) x*y [L49] yx = (long long) Y*x [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 11.8s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 197 SDslu, 421 SDs, 0 SdLazy, 1036 SolverSat, 97 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 70 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 33232 SizeOfPredicates, 121 NumberOfNonLiveVariables, 931 ConjunctsInSsa, 287 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 8/65 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...