/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/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:05,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:05,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:05,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:46:05,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:46:05,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:46:05,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:46:05,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:46:05,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:46:05,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:46:05,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:46:05,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:46:05,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:05,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:05,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:05,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:05,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:05,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:05,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:05,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:05,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:05,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:05,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:05,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:05,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:46:05,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:05,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:05,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:05,334 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 22:46:05,394 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:05,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:05,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:05,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:05,399 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:05,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:05,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:05,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:05,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:05,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:05,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:05,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:05,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:05,402 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:05,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:05,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:05,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:05,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:05,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:05,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:05,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:05,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:05,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:05,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:05,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:05,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:05,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:05,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:05,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:05,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:05,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:05,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:05,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:05,908 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:05,909 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:05,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-11-06 22:46:05,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9f08df7/914582d90a564f3fabd9d02e4db6ba90/FLAG5499d1b13 [2020-11-06 22:46:06,619 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:06,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-11-06 22:46:06,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9f08df7/914582d90a564f3fabd9d02e4db6ba90/FLAG5499d1b13 [2020-11-06 22:46:06,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9f08df7/914582d90a564f3fabd9d02e4db6ba90 [2020-11-06 22:46:06,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:06,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:06,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:06,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:07,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:07,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:06" (1/1) ... [2020-11-06 22:46:07,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159d779d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07, skipping insertion in model container [2020-11-06 22:46:07,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:06" (1/1) ... [2020-11-06 22:46:07,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:07,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:07,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:07,278 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:07,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:07,326 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:07,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07 WrapperNode [2020-11-06 22:46:07,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:07,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:07,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:07,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:07,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (1/1) ... [2020-11-06 22:46:07,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:07,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:07,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:07,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:07,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (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 22:46:07,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:07,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:07,483 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:07,483 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:07,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:07,483 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:07,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:07,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:07,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:07,853 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:07,853 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-06 22:46:07,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:07 BoogieIcfgContainer [2020-11-06 22:46:07,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:07,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:07,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:07,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:07,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:06" (1/3) ... [2020-11-06 22:46:07,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d168f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:07, skipping insertion in model container [2020-11-06 22:46:07,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:07" (2/3) ... [2020-11-06 22:46:07,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d168f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:07, skipping insertion in model container [2020-11-06 22:46:07,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:07" (3/3) ... [2020-11-06 22:46:07,864 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-11-06 22:46:07,880 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:07,883 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:07,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:07,925 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:07,925 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:07,926 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:07,926 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:07,926 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:07,926 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:07,926 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:07,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-06 22:46:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:07,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:07,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:07,953 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:07,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1417535483, now seen corresponding path program 1 times [2020-11-06 22:46:07,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:07,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454098206] [2020-11-06 22:46:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:08,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:08,309 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 22:46:08,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454098206] [2020-11-06 22:46:08,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:08,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:46:08,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161812452] [2020-11-06 22:46:08,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:08,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:08,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:08,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:08,335 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2020-11-06 22:46:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:08,609 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-11-06 22:46:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:46:08,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-06 22:46:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:08,619 INFO L225 Difference]: With dead ends: 51 [2020-11-06 22:46:08,620 INFO L226 Difference]: Without dead ends: 24 [2020-11-06 22:46:08,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:46:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-06 22:46:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-06 22:46:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-06 22:46:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-06 22:46:08,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2020-11-06 22:46:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:08,672 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-06 22:46:08,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-06 22:46:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:46:08,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:08,674 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:08,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:08,674 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash 878769720, now seen corresponding path program 1 times [2020-11-06 22:46:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:08,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370692830] [2020-11-06 22:46:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:08,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:08,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-06 22:46:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370692830] [2020-11-06 22:46:08,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:08,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:46:08,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604342467] [2020-11-06 22:46:08,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:08,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:08,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:08,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:46:08,829 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-11-06 22:46:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:09,056 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-06 22:46:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:46:09,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-06 22:46:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:09,058 INFO L225 Difference]: With dead ends: 24 [2020-11-06 22:46:09,058 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:46:09,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:46:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:46:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:46:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:46:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:46:09,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-06 22:46:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:09,061 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:46:09,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:46:09,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:46:09,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:46:09,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:46:09,278 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-11-06 22:46:09,278 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-06 22:46:09,279 INFO L266 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-11-06 22:46:09,279 INFO L266 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-06 22:46:09,279 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-06 22:46:09,279 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:09,279 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-11-06 22:46:09,280 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:09,280 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:09,280 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:46:09,280 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:46:09,280 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:09,280 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:46:09,281 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:09,281 INFO L266 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:09,281 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:09,281 INFO L262 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 1))) (and (< 0 .cse0) (<= .cse0 main_~nlen~0))) [2020-11-06 22:46:09,281 INFO L262 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 1))) (and (< 0 .cse0) (<= .cse0 main_~nlen~0))) [2020-11-06 22:46:09,282 INFO L266 CegarLoopResult]: For program point L27-2(lines 27 32) no Hoare annotation was computed. [2020-11-06 22:46:09,282 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 24 34) no Hoare annotation was computed. [2020-11-06 22:46:09,282 INFO L262 CegarLoopResult]: At program point L27-3(lines 27 32) the Hoare annotation is: (< 0 (+ main_~i~0 1)) [2020-11-06 22:46:09,282 INFO L266 CegarLoopResult]: For program point L27-4(lines 27 32) no Hoare annotation was computed. [2020-11-06 22:46:09,282 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 24 34) no Hoare annotation was computed. [2020-11-06 22:46:09,282 INFO L266 CegarLoopResult]: For program point L30(lines 28 31) no Hoare annotation was computed. [2020-11-06 22:46:09,283 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 24 34) the Hoare annotation is: true [2020-11-06 22:46:09,283 INFO L262 CegarLoopResult]: At program point L28-2(lines 28 31) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 1))) (and (< 0 .cse0) (<= .cse0 main_~nlen~0))) [2020-11-06 22:46:09,283 INFO L266 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:09,283 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-06 22:46:09,283 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:09,284 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-06 22:46:09,284 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:46:09,284 INFO L266 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-06 22:46:09,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:09 BoogieIcfgContainer [2020-11-06 22:46:09,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:09,304 INFO L168 Benchmark]: Toolchain (without parser) took 2319.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 109.4 MB in the end (delta: 16.4 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:09,305 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:09,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.11 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:09,307 INFO L168 Benchmark]: Boogie Preprocessor took 60.64 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:09,308 INFO L168 Benchmark]: RCFGBuilder took 461.28 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 132.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:09,309 INFO L168 Benchmark]: TraceAbstraction took 1444.70 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 109.4 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:09,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 333.11 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 115.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.64 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 461.28 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 132.9 MB in the end (delta: -18.7 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1444.70 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 109.4 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 0 < i + 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 < i + 1 && i + 1 <= nlen - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 39 SDslu, 46 SDs, 0 SdLazy, 93 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 18 PreInvPairs, 22 NumberOfFragments, 71 HoareAnnotationTreeSize, 18 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 153 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 1815 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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...