/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 07:19:24,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 07:19:24,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 07:19:24,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 07:19:24,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 07:19:24,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 07:19:24,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 07:19:24,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 07:19:24,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 07:19:24,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 07:19:24,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 07:19:24,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 07:19:24,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 07:19:24,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 07:19:24,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 07:19:24,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 07:19:24,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 07:19:24,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 07:19:24,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 07:19:24,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 07:19:24,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 07:19:24,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 07:19:24,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 07:19:24,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 07:19:24,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 07:19:24,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 07:19:24,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 07:19:24,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 07:19:24,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 07:19:24,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 07:19:24,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 07:19:24,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 07:19:24,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 07:19:24,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 07:19:24,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 07:19:24,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 07:19:24,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 07:19:24,726 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 07:19:24,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 07:19:24,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 07:19:24,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 07:19:24,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 07:19:24,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 07:19:24,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 07:19:24,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 07:19:24,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 07:19:24,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 07:19:24,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 07:19:24,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 07:19:24,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 07:19:24,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 07:19:24,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 07:19:24,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 07:19:24,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 07:19:24,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 07:19:24,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 07:19:24,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 07:19:24,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 07:19:24,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 07:19:24,732 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 07:19:24,733 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 07:19:25,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 07:19:25,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 07:19:25,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 07:19:25,140 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 07:19:25,143 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 07:19:25,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2021-04-16 07:19:25,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec3b58f0/dc445cc2fd9d4ea8a041cd93f17ff784/FLAGba53752f6 [2021-04-16 07:19:25,702 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 07:19:25,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2021-04-16 07:19:25,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec3b58f0/dc445cc2fd9d4ea8a041cd93f17ff784/FLAGba53752f6 [2021-04-16 07:19:26,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec3b58f0/dc445cc2fd9d4ea8a041cd93f17ff784 [2021-04-16 07:19:26,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 07:19:26,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 07:19:26,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 07:19:26,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 07:19:26,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 07:19:26,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c26b1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26, skipping insertion in model container [2021-04-16 07:19:26,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 07:19:26,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 07:19:26,253 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] [2021-04-16 07:19:26,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:19:26,268 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 07:19:26,285 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] [2021-04-16 07:19:26,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 07:19:26,318 INFO L208 MainTranslator]: Completed translation [2021-04-16 07:19:26,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26 WrapperNode [2021-04-16 07:19:26,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 07:19:26,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 07:19:26,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 07:19:26,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 07:19:26,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (1/1) ... [2021-04-16 07:19:26,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 07:19:26,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 07:19:26,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 07:19:26,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 07:19:26,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (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 [2021-04-16 07:19:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 07:19:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 07:19:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 07:19:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 07:19:26,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 07:19:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 07:19:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 07:19:26,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 07:19:26,660 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-16 07:19:26,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:19:26 BoogieIcfgContainer [2021-04-16 07:19:26,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 07:19:26,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 07:19:26,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 07:19:26,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 07:19:26,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 07:19:26" (1/3) ... [2021-04-16 07:19:26,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af3f706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:19:26, skipping insertion in model container [2021-04-16 07:19:26,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 07:19:26" (2/3) ... [2021-04-16 07:19:26,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af3f706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 07:19:26, skipping insertion in model container [2021-04-16 07:19:26,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 07:19:26" (3/3) ... [2021-04-16 07:19:26,669 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2021-04-16 07:19:26,675 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 07:19:26,680 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 07:19:26,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 07:19:26,719 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 07:19:26,720 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 07:19:26,720 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 07:19:26,720 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 07:19:26,720 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 07:19:26,720 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 07:19:26,720 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 07:19:26,720 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 07:19:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-16 07:19:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-16 07:19:26,742 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 07:19:26,742 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 07:19:26,743 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 07:19:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 07:19:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1579444895, now seen corresponding path program 1 times [2021-04-16 07:19:26,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 07:19:26,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815998182] [2021-04-16 07:19:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 07:19:26,830 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 07:19:26,940 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 07:19:26,940 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 07:19:26,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 07:19:26,965 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 07:19:26,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 07:19:26 BoogieIcfgContainer [2021-04-16 07:19:26,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 07:19:26,969 INFO L168 Benchmark]: Toolchain (without parser) took 889.92 ms. Allocated memory is still 204.5 MB. Free memory was 170.6 MB in the beginning and 159.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-04-16 07:19:26,971 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 204.5 MB. Free memory was 187.4 MB in the beginning and 187.2 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 07:19:26,972 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.05 ms. Allocated memory is still 204.5 MB. Free memory was 170.4 MB in the beginning and 188.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-04-16 07:19:26,973 INFO L168 Benchmark]: Boogie Preprocessor took 41.85 ms. Allocated memory is still 204.5 MB. Free memory was 188.9 MB in the beginning and 187.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 07:19:26,974 INFO L168 Benchmark]: RCFGBuilder took 298.16 ms. Allocated memory is still 204.5 MB. Free memory was 187.5 MB in the beginning and 171.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-16 07:19:26,974 INFO L168 Benchmark]: TraceAbstraction took 303.08 ms. Allocated memory is still 204.5 MB. Free memory was 171.8 MB in the beginning and 159.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-04-16 07:19:26,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 204.5 MB. Free memory was 187.4 MB in the beginning and 187.2 MB in the end (delta: 113.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.05 ms. Allocated memory is still 204.5 MB. Free memory was 170.4 MB in the beginning and 188.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.85 ms. Allocated memory is still 204.5 MB. Free memory was 188.9 MB in the beginning and 187.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.16 ms. Allocated memory is still 204.5 MB. Free memory was 187.5 MB in the beginning and 171.9 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 303.08 ms. Allocated memory is still 204.5 MB. Free memory was 171.8 MB in the beginning and 159.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 69]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1] int __return_main; [L12] int __return_96; [L15] int main__n; [L16] int main__sum; [L17] int main__i; [L18] main__n = __VERIFIER_nondet_int() [L19] COND FALSE !(!(1 <= main__n)) [L25] COND FALSE !(!(main__n <= 1000)) [L31] main__sum = 0 [L32] main__i = 1 [L33] COND TRUE main__i <= main__n [L35] main__sum = main__sum + main__i [L36] main__i = main__i + 1 [L37] COND TRUE main__i <= main__n [L39] main__sum = main__sum + main__i [L40] main__i = main__i + 1 [L41] COND TRUE main__i <= main__n [L43] main__sum = main__sum + main__i [L44] main__i = main__i + 1 [L45] COND TRUE main__i <= main__n [L47] main__sum = main__sum + main__i [L48] main__i = main__i + 1 [L49] COND TRUE main__i <= main__n [L51] main__sum = main__sum + main__i [L52] main__i = main__i + 1 [L54] COND FALSE !(main__i <= main__n) [L63] int __tmp_1; [L64] __tmp_1 = (2 * main__sum) == (main__n * (main__n + 1)) [L65] int __VERIFIER_assert__cond; [L66] __VERIFIER_assert__cond = __tmp_1 [L67] COND TRUE __VERIFIER_assert__cond == 0 [L69] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 228.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 10.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...