/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/array-fpi/s1liff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:09:48,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:09:48,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:09:48,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:09:48,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:09:48,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:09:48,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:09:48,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:09:48,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:09:48,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:09:48,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:09:48,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:09:48,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:09:48,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:09:48,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:09:48,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:09:48,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:09:48,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:09:48,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:09:48,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:09:48,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:09:48,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:09:48,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:09:48,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:09:48,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 23:09:48,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 23:09:48,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 23:09:48,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 23:09:48,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 23:09:48,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 23:09:48,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 23:09:48,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 23:09:48,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 23:09:48,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 23:09:48,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 23:09:48,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 23:09:48,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 23:09:48,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 23:09:48,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:09:48,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:09:48,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:09:48,261 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 23:09:48,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:09:48,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:09:48,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:09:48,277 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:09:48,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:09:48,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:09:48,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:09:48,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:09:48,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:09:48,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:09:48,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:09:48,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:09:48,280 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:09:48,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:09:48,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:09:48,281 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:09:48,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:09:48,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:09:48,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:09:48,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:09:48,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:09:48,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:09:48,282 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 23:09:48,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:09:48,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:09:48,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:09:48,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:09:48,812 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:09:48,813 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1liff.c [2020-09-04 23:09:48,892 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c0399d5b/83b158df68644a1e95bb8484823398ce/FLAG378a3d286 [2020-09-04 23:09:49,406 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:09:49,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s1liff.c [2020-09-04 23:09:49,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c0399d5b/83b158df68644a1e95bb8484823398ce/FLAG378a3d286 [2020-09-04 23:09:49,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c0399d5b/83b158df68644a1e95bb8484823398ce [2020-09-04 23:09:49,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:09:49,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:09:49,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:49,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:09:49,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:09:49,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:49" (1/1) ... [2020-09-04 23:09:49,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3330734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:49, skipping insertion in model container [2020-09-04 23:09:49,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:09:49" (1/1) ... [2020-09-04 23:09:49,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:09:49,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:09:50,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:50,084 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:09:50,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:09:50,136 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:09:50,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50 WrapperNode [2020-09-04 23:09:50,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:09:50,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:09:50,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:09:50,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:09:50,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (1/1) ... [2020-09-04 23:09:50,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:09:50,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:09:50,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:09:50,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:09:50,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (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 23:09:50,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:09:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:09:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:09:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:09:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:09:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:09:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:09:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:09:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:09:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:09:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:09:50,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:09:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:09:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:09:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 23:09:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 23:09:50,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:09:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:09:50,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:09:50,745 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:09:50,745 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:09:50,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:50 BoogieIcfgContainer [2020-09-04 23:09:50,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:09:50,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:09:50,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:09:50,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:09:50,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:09:49" (1/3) ... [2020-09-04 23:09:50,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292a95e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:50, skipping insertion in model container [2020-09-04 23:09:50,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:09:50" (2/3) ... [2020-09-04 23:09:50,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292a95e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:09:50, skipping insertion in model container [2020-09-04 23:09:50,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:09:50" (3/3) ... [2020-09-04 23:09:50,781 INFO L109 eAbstractionObserver]: Analyzing ICFG s1liff.c [2020-09-04 23:09:50,790 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:09:50,798 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:09:50,819 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:09:50,849 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:09:50,850 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:09:50,850 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:09:50,850 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:09:50,850 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:09:50,851 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:09:50,851 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:09:50,851 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:09:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states. [2020-09-04 23:09:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:09:50,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:50,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:50,884 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:50,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2050446892, now seen corresponding path program 1 times [2020-09-04 23:09:50,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:50,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079152761] [2020-09-04 23:09:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:51,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:51,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:51,161 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 23:09:51,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079152761] [2020-09-04 23:09:51,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:51,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 23:09:51,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457394193] [2020-09-04 23:09:51,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 23:09:51,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:51,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 23:09:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:51,201 INFO L87 Difference]: Start difference. First operand 71 states. Second operand 3 states. [2020-09-04 23:09:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:51,442 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-09-04 23:09:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 23:09:51,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-04 23:09:51,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:51,457 INFO L225 Difference]: With dead ends: 125 [2020-09-04 23:09:51,457 INFO L226 Difference]: Without dead ends: 59 [2020-09-04 23:09:51,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 23:09:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-04 23:09:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-04 23:09:51,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-04 23:09:51,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-09-04 23:09:51,524 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 33 [2020-09-04 23:09:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:51,525 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-09-04 23:09:51,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 23:09:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-09-04 23:09:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 23:09:51,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:51,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:51,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:09:51,529 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -341126016, now seen corresponding path program 1 times [2020-09-04 23:09:51,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:51,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487359769] [2020-09-04 23:09:51,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:51,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:51,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 23:09:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:51,676 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 23:09:51,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487359769] [2020-09-04 23:09:51,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:09:51,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:09:51,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217337172] [2020-09-04 23:09:51,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:09:51,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:09:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:09:51,683 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 5 states. [2020-09-04 23:09:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:51,943 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2020-09-04 23:09:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 23:09:51,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-04 23:09:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:51,946 INFO L225 Difference]: With dead ends: 115 [2020-09-04 23:09:51,947 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 23:09:51,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:09:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 23:09:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2020-09-04 23:09:51,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 23:09:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-09-04 23:09:51,966 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 33 [2020-09-04 23:09:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:51,967 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-09-04 23:09:51,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-09-04 23:09:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 23:09:51,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:51,986 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:51,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:09:51,986 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash 746418975, now seen corresponding path program 1 times [2020-09-04 23:09:51,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:51,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455988975] [2020-09-04 23:09:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:52,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 23:09:52,160 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 23:09:52,209 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 23:09:52,210 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 23:09:52,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:09:52,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:09:52 BoogieIcfgContainer [2020-09-04 23:09:52,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:09:52,277 INFO L168 Benchmark]: Toolchain (without parser) took 2519.89 ms. Allocated memory was 144.2 MB in the beginning and 231.7 MB in the end (delta: 87.6 MB). Free memory was 101.3 MB in the beginning and 193.0 MB in the end (delta: -91.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:09:52,278 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:09:52,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.39 ms. Allocated memory is still 144.2 MB. Free memory was 101.1 MB in the beginning and 90.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:52,280 INFO L168 Benchmark]: Boogie Preprocessor took 147.16 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.5 MB in the beginning and 178.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:52,281 INFO L168 Benchmark]: RCFGBuilder took 468.76 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 158.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-04 23:09:52,282 INFO L168 Benchmark]: TraceAbstraction took 1518.24 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 157.7 MB in the beginning and 193.0 MB in the end (delta: -35.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:09:52,286 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 377.39 ms. Allocated memory is still 144.2 MB. Free memory was 101.1 MB in the beginning and 90.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.16 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 90.5 MB in the beginning and 178.5 MB in the end (delta: -88.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 468.76 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 158.4 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1518.24 ms. Allocated memory was 201.3 MB in the beginning and 231.7 MB in the end (delta: 30.4 MB). Free memory was 157.7 MB in the beginning and 193.0 MB in the end (delta: -35.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] long long sum[1]; VAL [\old(N)=0, N=1, sum={5:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L29] sum[0] = N VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={5:0}] [L30] COND TRUE i