/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:11:08,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:11:08,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:11:08,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:11:08,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:11:08,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:11:08,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:11:08,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:11:08,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:11:08,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:11:08,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:11:08,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:11:08,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:11:08,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:11:08,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:11:08,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:11:08,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:11:08,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:11:08,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:11:08,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:11:08,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:11:08,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:11:08,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:11:08,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:11:08,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:11:08,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:11:08,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:11:08,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:11:08,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:11:08,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:11:08,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:11:08,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:11:08,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:11:08,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:11:08,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:11:08,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:11:08,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:11:08,213 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:11:08,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:11:08,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:11:08,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:11:08,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:11:08,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:11:08,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:11:08,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:11:08,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:11:08,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:11:08,216 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:11:08,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:11:08,216 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:11:08,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:11:08,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:11:08,217 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:11:08,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:11:08,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:11:08,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:11:08,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:11:08,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:11:08,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:11:08,219 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 23:11:08,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:11:08,681 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:11:08,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:11:08,687 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:11:08,688 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:11:08,689 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-09-04 23:11:08,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eff5bddbb/3474650751ed43baa431e6da2a245c28/FLAG856885296 [2020-09-04 23:11:09,344 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:11:09,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/verisec_NetBSD-libc_loop.i [2020-09-04 23:11:09,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eff5bddbb/3474650751ed43baa431e6da2a245c28/FLAG856885296 [2020-09-04 23:11:09,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eff5bddbb/3474650751ed43baa431e6da2a245c28 [2020-09-04 23:11:09,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:11:09,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:11:09,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:09,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:11:09,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:11:09,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:09" (1/1) ... [2020-09-04 23:11:09,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed69f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:09, skipping insertion in model container [2020-09-04 23:11:09,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:11:09" (1/1) ... [2020-09-04 23:11:09,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:11:09,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:11:09,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:10,005 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:11:10,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:11:10,043 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:11:10,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10 WrapperNode [2020-09-04 23:11:10,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:11:10,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:11:10,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:11:10,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:11:10,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... [2020-09-04 23:11:10,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:11:10,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:11:10,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:11:10,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:11:10,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 23:11:10,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:11:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:11:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:11:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure glob2 [2020-09-04 23:11:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:11:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:11:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:11:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure glob2 [2020-09-04 23:11:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:11:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:11:10,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:11:10,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:11:10,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:11:10,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:11:10,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:11:10,549 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:11:10,550 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:11:10,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:10 BoogieIcfgContainer [2020-09-04 23:11:10,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:11:10,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:11:10,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:11:10,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:11:10,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:11:09" (1/3) ... [2020-09-04 23:11:10,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfe089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:10, skipping insertion in model container [2020-09-04 23:11:10,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:11:10" (2/3) ... [2020-09-04 23:11:10,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcfe089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:11:10, skipping insertion in model container [2020-09-04 23:11:10,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:11:10" (3/3) ... [2020-09-04 23:11:10,564 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_NetBSD-libc_loop.i [2020-09-04 23:11:10,576 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:11:10,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:11:10,608 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:11:10,634 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:11:10,634 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:11:10,635 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:11:10,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:11:10,635 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:11:10,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:11:10,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:11:10,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:11:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-09-04 23:11:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 23:11:10,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:10,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:10,664 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash -331406787, now seen corresponding path program 1 times [2020-09-04 23:11:10,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:10,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894357752] [2020-09-04 23:11:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:11,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894357752] [2020-09-04 23:11:11,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:11:11,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 23:11:11,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818750804] [2020-09-04 23:11:11,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:11:11,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:11,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:11:11,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:11:11,184 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 10 states. [2020-09-04 23:11:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:11,668 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-09-04 23:11:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 23:11:11,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-09-04 23:11:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:11,679 INFO L225 Difference]: With dead ends: 76 [2020-09-04 23:11:11,680 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 23:11:11,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-09-04 23:11:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 23:11:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-04 23:11:11,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 23:11:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-09-04 23:11:11,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 21 [2020-09-04 23:11:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:11,734 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-09-04 23:11:11,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:11:11,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-09-04 23:11:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 23:11:11,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:11,736 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:11,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:11:11,737 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1840112204, now seen corresponding path program 1 times [2020-09-04 23:11:11,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:11,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137885522] [2020-09-04 23:11:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:11,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-04 23:11:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:11:12,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137885522] [2020-09-04 23:11:12,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:12,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 23:11:12,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464232645] [2020-09-04 23:11:12,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 23:11:12,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 23:11:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-04 23:11:12,021 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 12 states. [2020-09-04 23:11:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:12,490 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-04 23:11:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 23:11:12,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-09-04 23:11:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:12,492 INFO L225 Difference]: With dead ends: 49 [2020-09-04 23:11:12,493 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 23:11:12,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:11:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 23:11:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-09-04 23:11:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-04 23:11:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-09-04 23:11:12,511 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 31 [2020-09-04 23:11:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:12,511 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-09-04 23:11:12,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 23:11:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-09-04 23:11:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 23:11:12,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:12,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:12,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:11:12,514 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1122821221, now seen corresponding path program 2 times [2020-09-04 23:11:12,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:12,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618158812] [2020-09-04 23:11:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:11:12,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:11:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:11:12,583 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:11:12,623 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:11:12,624 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:11:12,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:11:12,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:11:12 BoogieIcfgContainer [2020-09-04 23:11:12,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:11:12,683 INFO L168 Benchmark]: Toolchain (without parser) took 2999.52 ms. Allocated memory was 138.9 MB in the beginning and 234.9 MB in the end (delta: 95.9 MB). Free memory was 102.8 MB in the beginning and 98.7 MB in the end (delta: 4.1 MB). Peak memory consumption was 100.0 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:12,684 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 23:11:12,685 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.55 ms. Allocated memory is still 138.9 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:12,686 INFO L168 Benchmark]: Boogie Preprocessor took 126.15 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 179.3 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:12,687 INFO L168 Benchmark]: RCFGBuilder took 384.55 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 163.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:12,688 INFO L168 Benchmark]: TraceAbstraction took 2120.22 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 162.6 MB in the beginning and 98.7 MB in the end (delta: 63.9 MB). Peak memory consumption was 97.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:11:12,693 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.55 ms. Allocated memory is still 138.9 MB. Free memory was 102.6 MB in the beginning and 92.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.15 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 179.3 MB in the end (delta: -86.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.55 ms. Allocated memory is still 201.3 MB. Free memory was 178.7 MB in the beginning and 163.3 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2120.22 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 162.6 MB in the beginning and 98.7 MB in the end (delta: 63.9 MB). Peak memory consumption was 97.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] Char *tmp; VAL [\old(tmp)=32, \old(tmp)=30, tmp={0:0}] [L29] Char pathbuf[1 +1]; VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={2:0}, tmp={0:0}] [L31] Char *bound = pathbuf + sizeof(pathbuf) - 1; VAL [\old(tmp)=0, \old(tmp)=0, bound={2:28}, pathbuf={2:0}, tmp={0:0}] [L33] tmp = pathbuf + sizeof(pathbuf)/sizeof(*pathbuf) - 1 VAL [\old(tmp)=0, \old(tmp)=0, bound={2:28}, pathbuf={2:0}, tmp={2:4}] [L35] CALL glob2 (pathbuf, bound) VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={2:0}, pathlim={2:28}, tmp={2:4}] [L16] Char *p; VAL [\old(tmp)=0, \old(tmp)=0, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p = pathbuf VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={2:4}] [L20] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L21] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={2:0}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(tmp)=0, \old(tmp)=0, cond=1, tmp={2:4}] [L20] RET __VERIFIER_assert(p<=tmp) VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L21] *p = 1 VAL [\old(tmp)=0, \old(tmp)=0, p={2:4}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] p++ VAL [\old(tmp)=0, \old(tmp)=0, p={2:8}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L18] COND TRUE p <= pathlim VAL [\old(tmp)=0, \old(tmp)=0, p={2:8}, pathbuf={2:0}, pathbuf={2:0}, pathlim={2:28}, pathlim={2:28}, tmp={2:4}] [L20] CALL __VERIFIER_assert(p<=tmp) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, tmp={2:4}] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={2:4}] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(tmp)=0, \old(tmp)=0, cond=0, tmp={2:4}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 150 SDslu, 153 SDs, 0 SdLazy, 295 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=2, 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, 6 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 7150 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 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...