/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/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:45:31,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:45:31,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:45:31,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:45:31,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:45:31,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:45:31,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:45:31,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:45:31,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:45:31,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:45:31,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:45:31,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:45:31,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:45:31,293 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:45:31,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:45:31,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:45:31,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:45:31,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:45:31,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:45:31,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:45:31,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:45:31,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:45:31,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:45:31,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:45:31,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:45:31,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:45:31,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:45:31,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:45:31,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:45:31,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:45:31,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:45:31,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:45:31,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:45:31,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:45:31,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:45:31,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:45:31,326 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 16:45:31,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:45:31,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:45:31,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:45:31,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:45:31,396 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:45:31,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:45:31,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:45:31,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:45:31,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:45:31,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:45:31,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:45:31,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:45:31,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:45:31,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:45:31,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:45:31,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:45:31,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:45:31,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:45:31,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:45:31,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:45:31,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:45:31,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:45:31,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:45:31,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:45:31,401 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:45:31,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:45:31,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:45:31,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:45:31,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:45:31,853 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:45:31,853 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:45:31,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-01-06 16:45:31,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/acda8c33f/05222d43fae54a93b9777e747c899ce6/FLAGd35caa1cc [2021-01-06 16:45:32,629 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:45:32,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/nested_1-1.c [2021-01-06 16:45:32,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/acda8c33f/05222d43fae54a93b9777e747c899ce6/FLAGd35caa1cc [2021-01-06 16:45:32,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/acda8c33f/05222d43fae54a93b9777e747c899ce6 [2021-01-06 16:45:32,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:45:33,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:45:33,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:45:33,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:45:33,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:45:33,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:45:32" (1/1) ... [2021-01-06 16:45:33,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7563e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33, skipping insertion in model container [2021-01-06 16:45:33,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:45:32" (1/1) ... [2021-01-06 16:45:33,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:45:33,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:45:33,226 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/loop-acceleration/nested_1-1.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 16:45:33,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:45:33,259 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:45:33,271 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/loop-acceleration/nested_1-1.c[322,335] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 16:45:33,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:45:33,289 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:45:33,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33 WrapperNode [2021-01-06 16:45:33,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:45:33,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:45:33,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:45:33,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:45:33,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:45:33,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:45:33,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:45:33,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:45:33,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (1/1) ... [2021-01-06 16:45:33,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:45:33,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:45:33,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:45:33,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:45:33,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (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 16:45:33,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:45:33,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:45:33,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:45:33,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:45:33,646 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:45:33,646 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 16:45:33,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:45:33 BoogieIcfgContainer [2021-01-06 16:45:33,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:45:33,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:45:33,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:45:33,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:45:33,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:45:32" (1/3) ... [2021-01-06 16:45:33,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e4f830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:45:33, skipping insertion in model container [2021-01-06 16:45:33,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:45:33" (2/3) ... [2021-01-06 16:45:33,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e4f830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:45:33, skipping insertion in model container [2021-01-06 16:45:33,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:45:33" (3/3) ... [2021-01-06 16:45:33,667 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-01-06 16:45:33,687 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:45:33,702 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:45:33,751 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:45:33,794 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:45:33,795 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:45:33,795 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:45:33,795 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:45:33,795 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:45:33,795 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:45:33,796 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:45:33,796 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:45:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:45:33,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:45:33,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:33,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:45:33,831 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:33,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:33,857 INFO L82 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2021-01-06 16:45:33,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:33,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152249346] [2021-01-06 16:45:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:34,144 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 16:45:34,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152249346] [2021-01-06 16:45:34,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:45:34,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:45:34,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753401213] [2021-01-06 16:45:34,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:45:34,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:45:34,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:45:34,180 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-01-06 16:45:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:34,247 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2021-01-06 16:45:34,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:45:34,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:45:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:34,265 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:45:34,265 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:45:34,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:45:34,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:45:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-01-06 16:45:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:45:34,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 16:45:34,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 16:45:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:34,309 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 16:45:34,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:45:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 16:45:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:45:34,312 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:34,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:34,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:45:34,313 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash 704531011, now seen corresponding path program 1 times [2021-01-06 16:45:34,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:34,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486980707] [2021-01-06 16:45:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486980707] [2021-01-06 16:45:34,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:45:34,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:45:34,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726942497] [2021-01-06 16:45:34,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:45:34,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:45:34,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:45:34,425 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-01-06 16:45:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:34,441 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-01-06 16:45:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:45:34,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 16:45:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:34,443 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:45:34,443 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:45:34,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:45:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:45:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:45:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:45:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 16:45:34,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-01-06 16:45:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:34,451 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 16:45:34,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:45:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 16:45:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:45:34,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:34,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:34,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:45:34,453 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1982141191, now seen corresponding path program 1 times [2021-01-06 16:45:34,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:34,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948331665] [2021-01-06 16:45:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:34,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948331665] [2021-01-06 16:45:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366792968] [2021-01-06 16:45:34,566 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 16:45:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:34,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:45:34,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:34,708 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 16:45:34,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:34,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 16:45:34,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115695223] [2021-01-06 16:45:34,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:45:34,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:34,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:45:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:45:34,711 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2021-01-06 16:45:34,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:34,787 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-01-06 16:45:34,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:45:34,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2021-01-06 16:45:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:34,788 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:45:34,789 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:45:34,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:45:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:45:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-01-06 16:45:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:45:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 16:45:34,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-01-06 16:45:34,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:34,795 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 16:45:34,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:45:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 16:45:34,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:45:34,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:34,797 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:35,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:45:35,011 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash 311415160, now seen corresponding path program 2 times [2021-01-06 16:45:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:35,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338808424] [2021-01-06 16:45:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 16:45:35,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338808424] [2021-01-06 16:45:35,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144966891] [2021-01-06 16:45:35,098 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 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 16:45:35,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:45:35,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:45:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:45:35,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:35,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 16:45:35,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158574479] [2021-01-06 16:45:35,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:45:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:45:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:45:35,201 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2021-01-06 16:45:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:35,389 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-01-06 16:45:35,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:45:35,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 16:45:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:35,391 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:45:35,391 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:45:35,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:45:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:45:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-01-06 16:45:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:45:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 16:45:35,400 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-01-06 16:45:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:35,401 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 16:45:35,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:45:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 16:45:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:45:35,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:35,402 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:35,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:35,617 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:35,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1517479077, now seen corresponding path program 3 times [2021-01-06 16:45:35,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:35,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78459633] [2021-01-06 16:45:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 16:45:35,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78459633] [2021-01-06 16:45:35,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949820844] [2021-01-06 16:45:35,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:45:35,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:45:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:35,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:45:35,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 16:45:35,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:35,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:45:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436678532] [2021-01-06 16:45:35,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:45:35,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:35,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:45:35,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:45:35,950 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2021-01-06 16:45:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:35,977 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-01-06 16:45:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:45:35,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 16:45:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:35,978 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:45:35,978 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:45:35,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:45:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:45:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:45:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:45:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-06 16:45:35,986 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2021-01-06 16:45:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:35,987 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-06 16:45:35,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:45:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-06 16:45:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:45:35,988 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:35,988 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:36,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:36,194 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash 640077219, now seen corresponding path program 4 times [2021-01-06 16:45:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:36,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345415285] [2021-01-06 16:45:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-01-06 16:45:36,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345415285] [2021-01-06 16:45:36,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483287085] [2021-01-06 16:45:36,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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) [2021-01-06 16:45:36,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:45:36,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:36,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:45:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-01-06 16:45:36,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:36,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 16:45:36,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790972252] [2021-01-06 16:45:36,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:45:36,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:36,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:45:36,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:45:36,421 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 12 states. [2021-01-06 16:45:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:36,910 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-01-06 16:45:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:45:36,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2021-01-06 16:45:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:36,912 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:45:36,912 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:45:36,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:45:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:45:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-01-06 16:45:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:45:36,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-01-06 16:45:36,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2021-01-06 16:45:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:36,922 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-01-06 16:45:36,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:45:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-01-06 16:45:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:45:36,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:36,924 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:37,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:37,139 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1035828652, now seen corresponding path program 5 times [2021-01-06 16:45:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:37,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903018470] [2021-01-06 16:45:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-01-06 16:45:37,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903018470] [2021-01-06 16:45:37,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8213218] [2021-01-06 16:45:37,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 16:45:37,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:45:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:45:37,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-01-06 16:45:37,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:37,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:45:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675686907] [2021-01-06 16:45:37,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:45:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:45:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:45:37,410 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2021-01-06 16:45:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:37,459 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-01-06 16:45:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:45:37,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2021-01-06 16:45:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:37,461 INFO L225 Difference]: With dead ends: 73 [2021-01-06 16:45:37,461 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:45:37,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:45:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:45:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 16:45:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:45:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-01-06 16:45:37,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 38 [2021-01-06 16:45:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:37,470 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-01-06 16:45:37,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:45:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-01-06 16:45:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:45:37,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:37,472 INFO L422 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:37,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:45:37,688 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash -294987944, now seen corresponding path program 6 times [2021-01-06 16:45:37,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:37,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071477158] [2021-01-06 16:45:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 16:45:37,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071477158] [2021-01-06 16:45:37,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598385637] [2021-01-06 16:45:37,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 16:45:38,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 16:45:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:45:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-01-06 16:45:38,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:38,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:45:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286778572] [2021-01-06 16:45:38,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:45:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:45:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:45:38,189 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2021-01-06 16:45:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:38,262 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-01-06 16:45:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:45:38,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2021-01-06 16:45:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:38,263 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:45:38,263 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:45:38,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:45:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:45:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 16:45:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:45:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 16:45:38,273 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-01-06 16:45:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:38,274 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 16:45:38,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:45:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 16:45:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:45:38,275 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:38,275 INFO L422 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:38,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:38,480 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1517248044, now seen corresponding path program 7 times [2021-01-06 16:45:38,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:38,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348646567] [2021-01-06 16:45:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 16:45:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348646567] [2021-01-06 16:45:38,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342326746] [2021-01-06 16:45:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:45:38,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 16:45:38,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:38,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:45:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82466127] [2021-01-06 16:45:38,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:45:38,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:45:38,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:45:38,810 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2021-01-06 16:45:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:38,882 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-01-06 16:45:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:45:38,883 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2021-01-06 16:45:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:38,883 INFO L225 Difference]: With dead ends: 87 [2021-01-06 16:45:38,884 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:45:38,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:45:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:45:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 16:45:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:45:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-01-06 16:45:38,893 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2021-01-06 16:45:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:38,894 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-01-06 16:45:38,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:45:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-01-06 16:45:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:45:38,895 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:38,895 INFO L422 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:39,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:39,110 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash -750680872, now seen corresponding path program 8 times [2021-01-06 16:45:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:39,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821668311] [2021-01-06 16:45:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 247 proven. 36 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-01-06 16:45:39,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821668311] [2021-01-06 16:45:39,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843594342] [2021-01-06 16:45:39,334 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 16:45:39,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:45:39,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:39,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:45:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 16:45:39,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:39,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-01-06 16:45:39,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138938360] [2021-01-06 16:45:39,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:45:39,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:39,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:45:39,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:45:39,566 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 16 states. [2021-01-06 16:45:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:40,709 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-01-06 16:45:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:45:40,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2021-01-06 16:45:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:40,711 INFO L225 Difference]: With dead ends: 117 [2021-01-06 16:45:40,711 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:45:40,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=297, Invalid=3363, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:45:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:45:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-01-06 16:45:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:45:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-01-06 16:45:40,726 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 50 [2021-01-06 16:45:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:40,726 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-01-06 16:45:40,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:45:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-01-06 16:45:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:45:40,727 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:40,728 INFO L422 BasicCegarLoop]: trace histogram [45, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:40,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:45:40,944 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -75863613, now seen corresponding path program 9 times [2021-01-06 16:45:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:40,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546155778] [2021-01-06 16:45:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 405 proven. 45 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-01-06 16:45:41,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546155778] [2021-01-06 16:45:41,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103042472] [2021-01-06 16:45:41,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 16:45:41,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:45:41,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:45:41,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 409 proven. 45 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-01-06 16:45:41,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:41,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:45:41,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773888405] [2021-01-06 16:45:41,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:45:41,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:41,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:45:41,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:45:41,549 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 13 states. [2021-01-06 16:45:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:41,650 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2021-01-06 16:45:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:45:41,650 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2021-01-06 16:45:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:41,651 INFO L225 Difference]: With dead ends: 126 [2021-01-06 16:45:41,652 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:45:41,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:45:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:45:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 16:45:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:45:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-01-06 16:45:41,663 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 66 [2021-01-06 16:45:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:41,663 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-01-06 16:45:41,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:45:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-01-06 16:45:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 16:45:41,665 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:41,665 INFO L422 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:41,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:41,873 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1313015549, now seen corresponding path program 10 times [2021-01-06 16:45:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:41,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689688811] [2021-01-06 16:45:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-01-06 16:45:42,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689688811] [2021-01-06 16:45:42,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891202403] [2021-01-06 16:45:42,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 16:45:42,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:45:42,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:42,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:45:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-01-06 16:45:42,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:42,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-01-06 16:45:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603705580] [2021-01-06 16:45:42,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:45:42,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:45:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:45:42,296 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 10 states. [2021-01-06 16:45:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:42,379 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-01-06 16:45:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:45:42,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2021-01-06 16:45:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:42,380 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:45:42,380 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:45:42,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:45:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:45:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-01-06 16:45:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:45:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-01-06 16:45:42,394 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 71 [2021-01-06 16:45:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:42,395 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-01-06 16:45:42,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:45:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-01-06 16:45:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:45:42,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:42,396 INFO L422 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:42,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:42,610 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2025848776, now seen corresponding path program 11 times [2021-01-06 16:45:42,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:42,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654044833] [2021-01-06 16:45:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-01-06 16:45:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654044833] [2021-01-06 16:45:42,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448684233] [2021-01-06 16:45:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 16:45:44,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-01-06 16:45:44,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 109 conjunts are in the unsatisfiable core [2021-01-06 16:45:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 30 proven. 2022 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-01-06 16:45:45,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:45,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 41] total 42 [2021-01-06 16:45:45,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859402973] [2021-01-06 16:45:45,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:45:45,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:45,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:45:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:45:45,796 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 42 states. [2021-01-06 16:45:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:46,346 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2021-01-06 16:45:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:45:46,347 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 84 [2021-01-06 16:45:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:46,348 INFO L225 Difference]: With dead ends: 156 [2021-01-06 16:45:46,348 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 16:45:46,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:45:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 16:45:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2021-01-06 16:45:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:45:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2021-01-06 16:45:46,366 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 84 [2021-01-06 16:45:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:46,366 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2021-01-06 16:45:46,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:45:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2021-01-06 16:45:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-01-06 16:45:46,368 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:46,368 INFO L422 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:46,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:45:46,575 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:46,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:46,577 INFO L82 PathProgramCache]: Analyzing trace with hash -771025117, now seen corresponding path program 12 times [2021-01-06 16:45:46,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:46,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555017346] [2021-01-06 16:45:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-01-06 16:45:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555017346] [2021-01-06 16:45:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111197471] [2021-01-06 16:45:46,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:49,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:45:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:49,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:45:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:49,446 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:45:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2021-01-06 16:45:49,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:45:49,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-01-06 16:45:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926968121] [2021-01-06 16:45:49,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:45:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:45:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:45:49,575 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 6 states. [2021-01-06 16:45:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:49,724 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-01-06 16:45:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:45:49,725 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2021-01-06 16:45:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:49,725 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:45:49,725 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:45:49,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:45:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:45:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:45:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:45:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:45:49,729 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2021-01-06 16:45:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:49,730 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:45:49,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:45:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:45:49,730 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:45:49,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:45:49,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:45:50,187 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 43 [2021-01-06 16:45:50,308 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:45:50,309 INFO L185 CegarLoopUtils]: At program point L19-2(lines 19 21) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~x~0 0))) (or (and .cse0 (= ULTIMATE.start_main_~y~0 1)) (and .cse0 (< (mod (+ ULTIMATE.start_main_~y~0 4294967294) 4294967296) 10) (< (mod (+ ULTIMATE.start_main_~y~0 4294967295) 4294967296) 10)) (and .cse0 (= ULTIMATE.start_main_~y~0 0)) (and (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455) (< (mod ULTIMATE.start_main_~x~0 4294967296) 268435455)))) [2021-01-06 16:45:50,309 INFO L189 CegarLoopUtils]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2021-01-06 16:45:50,309 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-01-06 16:45:50,309 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:45:50,309 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:45:50,310 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:45:50,310 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-01-06 16:45:50,310 INFO L185 CegarLoopUtils]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 0)) (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 268435455)) [2021-01-06 16:45:50,310 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 24) no Hoare annotation was computed. [2021-01-06 16:45:50,310 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-01-06 16:45:50,310 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 27) the Hoare annotation is: true [2021-01-06 16:45:50,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:45:50 BoogieIcfgContainer [2021-01-06 16:45:50,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:45:50,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:45:50,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:45:50,336 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:45:50,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:45:33" (3/4) ... [2021-01-06 16:45:50,340 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:45:50,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 16:45:50,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:45:50,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:45:50,353 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:45:50,411 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/nested_1-1.c-witness.graphml [2021-01-06 16:45:50,411 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:45:50,413 INFO L168 Benchmark]: Toolchain (without parser) took 17412.48 ms. Allocated memory was 151.0 MB in the beginning and 282.1 MB in the end (delta: 131.1 MB). Free memory was 127.1 MB in the beginning and 164.6 MB in the end (delta: -37.5 MB). Peak memory consumption was 94.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,413 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:45:50,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,417 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.32 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,420 INFO L168 Benchmark]: Boogie Preprocessor took 21.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 115.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,421 INFO L168 Benchmark]: RCFGBuilder took 298.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 104.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,421 INFO L168 Benchmark]: TraceAbstraction took 16682.79 ms. Allocated memory was 151.0 MB in the beginning and 282.1 MB in the end (delta: 131.1 MB). Free memory was 103.6 MB in the beginning and 167.2 MB in the end (delta: -63.6 MB). Peak memory consumption was 68.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,422 INFO L168 Benchmark]: Witness Printer took 75.92 ms. Allocated memory is still 282.1 MB. Free memory was 167.2 MB in the beginning and 164.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:45:50,424 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 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.99 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.32 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 115.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 104.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16682.79 ms. Allocated memory was 151.0 MB in the beginning and 282.1 MB in the end (delta: 131.1 MB). Free memory was 103.6 MB in the beginning and 167.2 MB in the end (delta: -63.6 MB). Peak memory consumption was 68.4 MB. Max. memory is 8.0 GB. * Witness Printer took 75.92 ms. Allocated memory is still 282.1 MB. Free memory was 167.2 MB in the beginning and 164.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((x == 0 && y == 1) || ((x == 0 && (y + 4294967294) % 4294967296 < 10) && (y + 4294967295) % 4294967296 < 10)) || (x == 0 && y == 0)) || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || (x + 4294967295) % 4294967296 < 268435455 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.1s, OverallIterations: 14, TraceHistogramMax: 70, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 67 SDslu, 555 SDs, 0 SdLazy, 2252 SolverSat, 194 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 750 GetRequests, 517 SyntacticMatches, 17 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=13, 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, 14 MinimizatonAttempts, 53 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 89 NumberOfFragments, 62 HoareAnnotationTreeSize, 3 FomulaSimplifications, 9318 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 3 FomulaSimplificationsInter, 76 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 1157 NumberOfCodeBlocks, 966 NumberOfCodeBlocksAsserted, 109 NumberOfCheckSat, 1131 ConstructedInterpolants, 0 QuantifiedInterpolants, 286423 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1274 ConjunctsInSsa, 262 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 10127/19941 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 proved your program to be correct! Received shutdown request...