/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/reducercommutativity/rangesum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:03:27,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:03:27,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:03:27,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:03:27,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:03:27,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:03:27,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:03:27,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:03:27,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:03:27,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:03:27,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:03:27,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:03:27,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:03:27,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:03:27,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:03:27,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:03:27,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:03:27,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:03:27,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:03:27,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:03:27,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:03:27,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:03:27,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:03:27,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:03:27,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:03:27,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:03:27,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:03:27,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:03:27,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:03:27,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:03:27,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:03:27,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:03:27,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:03:27,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:03:27,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:03:27,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:03:27,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:03:27,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:03:27,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:03:27,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:03:27,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:03:27,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:03:27,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:03:27,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:03:27,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:03:27,287 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:03:27,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:03:27,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:03:27,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:03:27,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:03:27,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:03:27,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:03:27,290 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:03:27,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:03:27,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:03:27,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:03:27,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:03:27,292 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:03:27,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:03:27,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:03:27,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:03:27,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:03:27,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:03:27,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:03:27,293 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 [2020-07-17 18:03:27,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:03:27,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:03:27,612 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:03:27,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:03:27,614 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:03:27,615 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-17 18:03:27,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/077703980/92b9bd7054594f41a7efd3568788b99a/FLAG465e8af7a [2020-07-17 18:03:28,207 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:03:28,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum.i [2020-07-17 18:03:28,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/077703980/92b9bd7054594f41a7efd3568788b99a/FLAG465e8af7a [2020-07-17 18:03:28,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/077703980/92b9bd7054594f41a7efd3568788b99a [2020-07-17 18:03:28,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:03:28,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:03:28,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:03:28,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:03:28,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:03:28,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:28,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bbbeff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28, skipping insertion in model container [2020-07-17 18:03:28,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:28,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:03:28,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:03:28,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:03:28,838 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:03:28,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:03:28,883 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:03:28,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28 WrapperNode [2020-07-17 18:03:28,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:03:28,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:03:28,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:03:28,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:03:29,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (1/1) ... [2020-07-17 18:03:29,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:03:29,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:03:29,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:03:29,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:03:29,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (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 [2020-07-17 18:03:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:03:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:03:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2020-07-17 18:03:29,120 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2020-07-17 18:03:29,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:03:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:03:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:03:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2020-07-17 18:03:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 18:03:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2020-07-17 18:03:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 18:03:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:03:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 18:03:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 18:03:29,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:03:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:03:29,603 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:03:29,604 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-17 18:03:29,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:03:29 BoogieIcfgContainer [2020-07-17 18:03:29,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:03:29,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:03:29,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:03:29,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:03:29,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:03:28" (1/3) ... [2020-07-17 18:03:29,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393fc8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:03:29, skipping insertion in model container [2020-07-17 18:03:29,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:03:28" (2/3) ... [2020-07-17 18:03:29,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393fc8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:03:29, skipping insertion in model container [2020-07-17 18:03:29,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:03:29" (3/3) ... [2020-07-17 18:03:29,621 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2020-07-17 18:03:29,632 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:03:29,641 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:03:29,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:03:29,687 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:03:29,688 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:03:29,688 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:03:29,688 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:03:29,688 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:03:29,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:03:29,689 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:03:29,689 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:03:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states. [2020-07-17 18:03:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-17 18:03:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:03:29,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-07-17 18:03:29,728 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:03:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:03:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash -657395557, now seen corresponding path program 1 times [2020-07-17 18:03:29,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:03:29,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036693958] [2020-07-17 18:03:29,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:03:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:03:30,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036693958] [2020-07-17 18:03:30,032 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2020-07-17 18:03:30,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:03:30,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-17 18:03:30,033 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-17 18:03:30,034 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 18:03:30,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:03:30,062 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-17 18:03:30,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:03:30 BoogieIcfgContainer [2020-07-17 18:03:30,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:03:30,066 INFO L168 Benchmark]: Toolchain (without parser) took 1477.69 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 103.4 MB in the beginning and 140.4 MB in the end (delta: -37.0 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-07-17 18:03:30,067 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 145.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 18:03:30,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.70 ms. Allocated memory is still 145.8 MB. Free memory was 102.9 MB in the beginning and 92.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:03:30,070 INFO L168 Benchmark]: Boogie Preprocessor took 152.24 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 92.1 MB in the beginning and 182.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:03:30,071 INFO L168 Benchmark]: RCFGBuilder took 573.04 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 159.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:03:30,072 INFO L168 Benchmark]: TraceAbstraction took 451.61 ms. Allocated memory is still 205.0 MB. Free memory was 159.1 MB in the beginning and 140.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:03:30,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 145.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.70 ms. Allocated memory is still 145.8 MB. Free memory was 102.9 MB in the beginning and 92.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.24 ms. Allocated memory was 145.8 MB in the beginning and 205.0 MB in the end (delta: 59.2 MB). Free memory was 92.1 MB in the beginning and 182.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 573.04 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 159.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 451.61 ms. Allocated memory is still 205.0 MB. Free memory was 159.1 MB in the beginning and 140.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 53]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L4] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] CALL init_nondet(x) [L6] int i; [L7] i = 0 [L35] RET init_nondet(x) [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L41] CALL, EXPR rangesum(x) [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 [L18] COND FALSE !(i < N) [L24] COND TRUE cnt !=0 [L25] return ret / cnt; [L41] RET, EXPR rangesum(x) [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp [L44] CALL, EXPR rangesum(x) [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 [L18] COND FALSE !(i < N) [L24] COND TRUE cnt !=0 [L25] return ret / cnt; [L44] RET, EXPR rangesum(x) [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; [L49] x[N-1] = temp [L50] CALL, EXPR rangesum(x) [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 [L18] COND FALSE !(i < N) [L24] COND TRUE cnt !=0 [L25] return ret / cnt; [L50] RET, EXPR rangesum(x) [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 [L53] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 91 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...