/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/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:46:41,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:46:41,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:46:41,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:46:41,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:46:41,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:46:41,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:46:41,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:46:41,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:46:41,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:46:41,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:46:41,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:46:41,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:46:41,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:46:41,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:46:41,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:46:41,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:46:41,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:46:41,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:46:41,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:46:41,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:46:41,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:46:41,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:46:41,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:46:41,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:46:41,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:46:41,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:46:41,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:46:41,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:46:41,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:46:41,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:46:41,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:46:41,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:46:41,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:46:41,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:46:41,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:46:41,374 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 16:46:41,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:46:41,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:46:41,430 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:46:41,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:46:41,430 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:46:41,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:46:41,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:46:41,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:46:41,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:46:41,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:46:41,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:46:41,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:46:41,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:46:41,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:46:41,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:46:41,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:46:41,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:46:41,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:46:41,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:46:41,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:46:41,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:46:41,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:46:41,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:46:41,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:46:41,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:46:41,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:46:41,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:46:41,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:46:41,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:46:41,939 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:46:41,940 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:46:41,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2021-01-06 16:46:42,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd5216378/49d4ef3ee49e4739964e6a89b7b24e76/FLAG84ca3e9f0 [2021-01-06 16:46:42,590 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:46:42,591 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2021-01-06 16:46:42,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd5216378/49d4ef3ee49e4739964e6a89b7b24e76/FLAG84ca3e9f0 [2021-01-06 16:46:42,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd5216378/49d4ef3ee49e4739964e6a89b7b24e76 [2021-01-06 16:46:42,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:46:42,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:46:42,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:42,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:46:42,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:46:42,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:42" (1/1) ... [2021-01-06 16:46:42,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb9b741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:42, skipping insertion in model container [2021-01-06 16:46:42,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:42" (1/1) ... [2021-01-06 16:46:42,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:46:43,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:46:43,151 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/underapprox_2-2.c[327,340] [2021-01-06 16:46:43,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:43,174 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:46:43,188 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/underapprox_2-2.c[327,340] [2021-01-06 16:46:43,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:43,207 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:46:43,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43 WrapperNode [2021-01-06 16:46:43,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:43,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:43,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:46:43,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:46:43,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:43,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:46:43,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:46:43,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:46:43,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (1/1) ... [2021-01-06 16:46:43,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:46:43,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:46:43,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:46:43,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:46:43,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (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 16:46:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:46:43,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:46:43,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:46:43,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:46:43,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:46:43,598 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:46:43,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:43 BoogieIcfgContainer [2021-01-06 16:46:43,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:46:43,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:46:43,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:46:43,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:46:43,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:46:42" (1/3) ... [2021-01-06 16:46:43,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d56761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:43, skipping insertion in model container [2021-01-06 16:46:43,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:43" (2/3) ... [2021-01-06 16:46:43,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d56761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:43, skipping insertion in model container [2021-01-06 16:46:43,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:43" (3/3) ... [2021-01-06 16:46:43,610 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2021-01-06 16:46:43,617 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:46:43,632 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:46:43,681 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:46:43,728 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:46:43,728 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:46:43,728 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:46:43,728 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:46:43,728 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:46:43,729 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:46:43,729 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:46:43,729 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:46:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:46:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:46:43,750 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:43,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:46:43,751 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:43,758 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 16:46:43,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:43,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974235119] [2021-01-06 16:46:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:44,039 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 16:46:44,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974235119] [2021-01-06 16:46:44,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:46:44,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:46:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901314702] [2021-01-06 16:46:44,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:46:44,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:46:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:46:44,066 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-01-06 16:46:44,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:44,096 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:46:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:46:44,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:46:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:44,108 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:46:44,108 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:46:44,111 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 16:46:44,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:46:44,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:46:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:46:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:46:44,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:46:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:44,146 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:46:44,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:46:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:46:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:46:44,147 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:44,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:44,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:46:44,148 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 16:46:44,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:44,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534516752] [2021-01-06 16:46:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:44,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534516752] [2021-01-06 16:46:44,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853957229] [2021-01-06 16:46:44,258 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 16:46:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:46:44,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:44,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:46:44,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825596792] [2021-01-06 16:46:44,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:46:44,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:44,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:46:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:46:44,375 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2021-01-06 16:46:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:44,393 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-01-06 16:46:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:46:44,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 16:46:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:44,394 INFO L225 Difference]: With dead ends: 13 [2021-01-06 16:46:44,395 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:46:44,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:46:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:46:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:46:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:46:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:46:44,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-01-06 16:46:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:44,399 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:46:44,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:46:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:46:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:46:44,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:44,400 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:44,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:46:44,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-01-06 16:46:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:44,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232244207] [2021-01-06 16:46:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:44,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232244207] [2021-01-06 16:46:44,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128564716] [2021-01-06 16:46:44,726 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 16:46:44,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:44,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:46:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:44,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:44,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:46:44,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785467804] [2021-01-06 16:46:44,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:46:44,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:46:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:46:44,808 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2021-01-06 16:46:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:44,832 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-01-06 16:46:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:46:44,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 16:46:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:44,834 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:46:44,834 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:46:44,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:46:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:46:44,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:46:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:46:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:46:44,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-01-06 16:46:44,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:44,839 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:46:44,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:46:44,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:46:44,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:46:44,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:44,840 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:45,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:45,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:45,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:45,056 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2021-01-06 16:46:45,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:45,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122182197] [2021-01-06 16:46:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:45,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122182197] [2021-01-06 16:46:45,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270994719] [2021-01-06 16:46:45,191 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 16:46:45,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:46:45,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:46:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:45,386 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:46:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:46:45,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:46:45,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-01-06 16:46:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792541756] [2021-01-06 16:46:45,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:46:45,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:46:45,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:46:45,438 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2021-01-06 16:46:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:45,483 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-01-06 16:46:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:46:45,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 16:46:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:45,484 INFO L225 Difference]: With dead ends: 10 [2021-01-06 16:46:45,484 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 16:46:45,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:46:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 16:46:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 16:46:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 16:46:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 16:46:45,489 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-01-06 16:46:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:45,489 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 16:46:45,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:46:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 16:46:45,490 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 16:46:45,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:45,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 16:46:45,744 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 16:46:45,744 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-01-06 16:46:45,744 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 16:46:45,745 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 16:46:45,745 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 16:46:45,745 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-01-06 16:46:45,745 INFO L185 CegarLoopUtils]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (< (mod (+ ULTIMATE.start_main_~x~0 4294967295) 4294967296) 6) (= ULTIMATE.start_main_~x~0 0)) [2021-01-06 16:46:45,745 INFO L189 CegarLoopUtils]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2021-01-06 16:46:45,746 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-01-06 16:46:45,746 INFO L192 CegarLoopUtils]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2021-01-06 16:46:45,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:46:45 BoogieIcfgContainer [2021-01-06 16:46:45,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:46:45,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:46:45,765 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:46:45,765 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:46:45,766 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:43" (3/4) ... [2021-01-06 16:46:45,770 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 16:46:45,783 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-01-06 16:46:45,783 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 16:46:45,784 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:46:45,784 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 16:46:45,836 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-acceleration/underapprox_2-2.c-witness.graphml [2021-01-06 16:46:45,836 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:46:45,839 INFO L168 Benchmark]: Toolchain (without parser) took 2867.74 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 55.8 MB in the end (delta: 74.8 MB). Peak memory consumption was 74.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,840 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 155.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:46:45,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.02 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 121.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,842 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.14 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,843 INFO L168 Benchmark]: Boogie Preprocessor took 23.09 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 118.9 MB in the end (delta: 959.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,843 INFO L168 Benchmark]: RCFGBuilder took 328.78 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 108.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,850 INFO L168 Benchmark]: TraceAbstraction took 2162.06 ms. Allocated memory is still 155.2 MB. Free memory was 107.7 MB in the beginning and 57.8 MB in the end (delta: 49.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,851 INFO L168 Benchmark]: Witness Printer took 72.95 ms. Allocated memory is still 155.2 MB. Free memory was 57.8 MB in the beginning and 55.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:46:45,858 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 155.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.02 ms. Allocated memory is still 155.2 MB. Free memory was 130.3 MB in the beginning and 121.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.14 ms. Allocated memory is still 155.2 MB. Free memory was 121.1 MB in the beginning and 119.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.09 ms. Allocated memory is still 155.2 MB. Free memory was 119.8 MB in the beginning and 118.9 MB in the end (delta: 959.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 328.78 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 108.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2162.06 ms. Allocated memory is still 155.2 MB. Free memory was 107.7 MB in the beginning and 57.8 MB in the end (delta: 49.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. * Witness Printer took 72.95 ms. Allocated memory is still 155.2 MB. Free memory was 57.8 MB in the beginning and 55.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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: 16]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 6 || x == 0 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 3 SDslu, 28 SDs, 0 SdLazy, 43 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 31 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 54 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 1005 SizeOfPredicates, 2 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 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...