/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:07,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:07,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:07,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:07,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:07,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:07,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:07,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:07,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:07,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:07,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:07,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:07,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:07,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:07,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:07,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:07,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:07,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:07,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:07,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:07,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:07,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:07,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:07,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:07,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:45:07,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:45:07,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:45:07,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:45:07,391 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:45:07,392 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:45:07,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:45:07,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:45:07,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:45:07,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:07,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:07,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:07,398 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:07,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:07,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:07,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:07,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:07,429 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:07,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:07,429 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:07,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:07,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:07,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:07,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:07,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:07,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:07,431 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:07,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:07,433 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:07,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:07,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:07,433 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:07,434 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:07,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:07,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:07,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:07,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:07,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:07,435 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:07,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:07,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:07,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:07,436 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:07,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:07,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:07,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:07,917 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:07,918 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:07,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-11-06 22:45:08,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7e08c01/1fe2bf02acf747b8ad9098f68a224036/FLAGf1e619697 [2020-11-06 22:45:08,612 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:08,612 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2020-11-06 22:45:08,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7e08c01/1fe2bf02acf747b8ad9098f68a224036/FLAGf1e619697 [2020-11-06 22:45:08,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7e08c01/1fe2bf02acf747b8ad9098f68a224036 [2020-11-06 22:45:08,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:08,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:08,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:08,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:08,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:08,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:08" (1/1) ... [2020-11-06 22:45:08,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f2e28d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:08, skipping insertion in model container [2020-11-06 22:45:08,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:08" (1/1) ... [2020-11-06 22:45:09,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:09,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:09,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:09,218 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:09,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:09,259 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:09,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09 WrapperNode [2020-11-06 22:45:09,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:09,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:09,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:09,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:09,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... [2020-11-06 22:45:09,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:09,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:09,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:09,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:09,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:09,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:09,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:09,398 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:09,398 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:09,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-06 22:45:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:09,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 22:45:09,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:09,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:09,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:09,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:09,757 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:09,758 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:09,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:09 BoogieIcfgContainer [2020-11-06 22:45:09,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:09,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:09,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:09,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:09,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:08" (1/3) ... [2020-11-06 22:45:09,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb761c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:09, skipping insertion in model container [2020-11-06 22:45:09,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:09" (2/3) ... [2020-11-06 22:45:09,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb761c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:09, skipping insertion in model container [2020-11-06 22:45:09,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:09" (3/3) ... [2020-11-06 22:45:09,784 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-11-06 22:45:09,803 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:09,807 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:09,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:09,890 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:09,891 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:09,891 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:09,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:09,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:09,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:09,891 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:09,892 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-11-06 22:45:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:45:09,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:09,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:09,934 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:09,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1161805481, now seen corresponding path program 1 times [2020-11-06 22:45:09,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:09,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546317782] [2020-11-06 22:45:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:10,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:10,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546317782] [2020-11-06 22:45:10,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:10,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:45:10,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236883345] [2020-11-06 22:45:10,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:45:10,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:10,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:45:10,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:10,424 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-11-06 22:45:10,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:10,778 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-11-06 22:45:10,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:10,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-06 22:45:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:10,793 INFO L225 Difference]: With dead ends: 58 [2020-11-06 22:45:10,794 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:45:10,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:45:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-06 22:45:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:45:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:45:10,886 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-11-06 22:45:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:10,887 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:45:10,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:45:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:45:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:45:10,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:10,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:10,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:10,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:10,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:10,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1554832491, now seen corresponding path program 1 times [2020-11-06 22:45:10,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:10,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057252906] [2020-11-06 22:45:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:11,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:11,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057252906] [2020-11-06 22:45:11,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:11,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:45:11,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660582733] [2020-11-06 22:45:11,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:45:11,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:11,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:45:11,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:11,189 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-11-06 22:45:11,432 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-11-06 22:45:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:11,504 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-06 22:45:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:11,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-06 22:45:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:11,507 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:45:11,518 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:45:11,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:45:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-11-06 22:45:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:45:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-06 22:45:11,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-11-06 22:45:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:11,529 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-06 22:45:11,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:45:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-06 22:45:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:45:11,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:11,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:11,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:11,531 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash 36405024, now seen corresponding path program 1 times [2020-11-06 22:45:11,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:11,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204742930] [2020-11-06 22:45:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:11,567 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:11,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:11,633 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:11,633 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:11,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:45:11,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:11 BoogieIcfgContainer [2020-11-06 22:45:11,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:11,673 INFO L168 Benchmark]: Toolchain (without parser) took 2694.45 ms. Allocated memory is still 154.1 MB. Free memory was 129.7 MB in the beginning and 129.4 MB in the end (delta: 351.5 kB). Peak memory consumption was 1.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:11,674 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:11,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.46 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 119.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:11,676 INFO L168 Benchmark]: Boogie Preprocessor took 42.45 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 117.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:11,677 INFO L168 Benchmark]: RCFGBuilder took 466.80 ms. Allocated memory is still 154.1 MB. Free memory was 117.6 MB in the beginning and 137.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:11,678 INFO L168 Benchmark]: TraceAbstraction took 1897.55 ms. Allocated memory is still 154.1 MB. Free memory was 136.9 MB in the beginning and 129.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:11,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory is still 127.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.46 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 119.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.45 ms. Allocated memory is still 154.1 MB. Free memory was 119.2 MB in the beginning and 117.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 466.80 ms. Allocated memory is still 154.1 MB. Free memory was 117.6 MB in the beginning and 137.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1897.55 ms. Allocated memory is still 154.1 MB. Free memory was 136.9 MB in the beginning and 129.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int b; VAL [\old(b)=261, b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; VAL [b=0, k=1] [L19] COND TRUE \read(k) [L20] n=0 VAL [b=0, k=1, n=0] [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, k=1, n=0] [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L30] COND FALSE !(i <= n) VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L35] a[i]=0 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L36] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L8] CALL reach_error() VAL [b=0] [L3] __assert_fail("0", "nec20.c", 3, "reach_error") VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 53 SDslu, 28 SDs, 0 SdLazy, 73 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 2 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 2190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...