/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:47:19,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:47:19,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:47:19,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:47:19,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:47:19,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:47:19,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:47:19,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:47:19,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:47:19,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:47:19,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:47:19,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:47:19,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:47:19,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:47:19,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:47:19,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:47:19,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:47:19,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:47:19,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:47:19,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:47:19,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:47:19,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:47:19,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:47:19,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:47:19,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:47:19,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:47:19,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:47:19,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:47:19,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:47:19,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:47:19,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:47:19,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:47:19,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:47:19,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:47:19,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:47:19,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:47:19,457 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:47:19,457 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:47:19,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:47:19,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:19,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:47:19,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:47:19,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:47:19,458 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:47:19,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:47:19,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:47:19,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:47:19,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:47:19,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:47:19,833 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:47:19,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2021-02-24 04:47:19,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454836ad0/28700748dc994842868e21ee98fcfb50/FLAG5372ecbc9 [2021-02-24 04:47:20,530 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:47:20,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2021-02-24 04:47:20,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454836ad0/28700748dc994842868e21ee98fcfb50/FLAG5372ecbc9 [2021-02-24 04:47:20,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/454836ad0/28700748dc994842868e21ee98fcfb50 [2021-02-24 04:47:20,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:47:20,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:47:20,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:20,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:47:20,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:47:20,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:20" (1/1) ... [2021-02-24 04:47:20,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71dd3c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:20, skipping insertion in model container [2021-02-24 04:47:20,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:20" (1/1) ... [2021-02-24 04:47:20,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:47:20,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:47:21,087 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2021-02-24 04:47:21,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:21,107 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:47:21,120 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2021-02-24 04:47:21,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:21,139 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:47:21,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21 WrapperNode [2021-02-24 04:47:21,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:21,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:47:21,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:47:21,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:47:21,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (1/1) ... [2021-02-24 04:47:21,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:47:21,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:47:21,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:47:21,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:47:21,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (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 [2021-02-24 04:47:21,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:47:21,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:47:21,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:47:21,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:47:21,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:47:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:47:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:47:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:47:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:47:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:47:21,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:47:21,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:47:21,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:47:21,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:47:21,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:47:21,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:47:21,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:47:21,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:47:21,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:47:21,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:47:21,507 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:47:21,507 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:47:21,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:21 BoogieIcfgContainer [2021-02-24 04:47:21,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:47:21,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:47:21,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:47:21,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:47:21,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:47:20" (1/3) ... [2021-02-24 04:47:21,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39eaa83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:21, skipping insertion in model container [2021-02-24 04:47:21,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:21" (2/3) ... [2021-02-24 04:47:21,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39eaa83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:21, skipping insertion in model container [2021-02-24 04:47:21,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:21" (3/3) ... [2021-02-24 04:47:21,531 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2021-02-24 04:47:21,542 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:47:21,556 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:47:21,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:47:21,710 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:47:21,711 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:47:21,711 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:47:21,711 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:47:21,711 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:47:21,711 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:47:21,712 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:47:21,712 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:47:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-02-24 04:47:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-24 04:47:21,756 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:21,758 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] [2021-02-24 04:47:21,758 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:21,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1347732111, now seen corresponding path program 1 times [2021-02-24 04:47:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:21,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594431975] [2021-02-24 04:47:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:21,901 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:22,103 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:22,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:22,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:22,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:22,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594431975] [2021-02-24 04:47:22,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:22,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:47:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850483266] [2021-02-24 04:47:22,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:47:22,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:22,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:47:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:22,246 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2021-02-24 04:47:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:22,370 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-02-24 04:47:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:47:22,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-02-24 04:47:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:22,381 INFO L225 Difference]: With dead ends: 47 [2021-02-24 04:47:22,381 INFO L226 Difference]: Without dead ends: 28 [2021-02-24 04:47:22,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-24 04:47:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-24 04:47:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-24 04:47:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-24 04:47:22,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2021-02-24 04:47:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:22,458 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-24 04:47:22,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:47:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-24 04:47:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-24 04:47:22,460 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:22,460 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] [2021-02-24 04:47:22,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:47:22,461 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:22,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1339420422, now seen corresponding path program 1 times [2021-02-24 04:47:22,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:22,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104883972] [2021-02-24 04:47:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:22,476 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:22,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:22,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:47:22,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:22,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:22,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,654 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:22,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:22,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:22,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104883972] [2021-02-24 04:47:22,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:22,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:47:22,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530218367] [2021-02-24 04:47:22,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:47:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:22,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:47:22,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:47:22,695 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2021-02-24 04:47:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:22,877 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-02-24 04:47:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:47:22,878 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2021-02-24 04:47:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:22,880 INFO L225 Difference]: With dead ends: 35 [2021-02-24 04:47:22,880 INFO L226 Difference]: Without dead ends: 30 [2021-02-24 04:47:22,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:47:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-24 04:47:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-02-24 04:47:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-24 04:47:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-02-24 04:47:22,894 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 23 [2021-02-24 04:47:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:22,895 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-02-24 04:47:22,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:47:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-02-24 04:47:22,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-24 04:47:22,896 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:22,896 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] [2021-02-24 04:47:22,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:47:22,897 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -924971526, now seen corresponding path program 1 times [2021-02-24 04:47:22,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:22,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987300683] [2021-02-24 04:47:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:22,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:47:22,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:22,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:47:22,955 WARN L141 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size [2021-02-24 04:47:22,969 WARN L147 QuantifierPusher]: treesize reduction 4, result has 76.5 percent of original size 13 [2021-02-24 04:47:22,975 WARN L141 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size [2021-02-24 04:47:22,978 WARN L147 QuantifierPusher]: treesize reduction 8, result has 81.8 percent of original size 36 [2021-02-24 04:47:22,979 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:47:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:23,003 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:23,035 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:23,074 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:47:23,074 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:47:23,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:47:23,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:47:23 BoogieIcfgContainer [2021-02-24 04:47:23,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:47:23,097 INFO L168 Benchmark]: Toolchain (without parser) took 2205.15 ms. Allocated memory is still 155.2 MB. Free memory was 132.2 MB in the beginning and 66.2 MB in the end (delta: 66.1 MB). Peak memory consumption was 66.2 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:23,098 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory was 128.9 MB in the beginning and 128.7 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:47:23,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.40 ms. Allocated memory is still 155.2 MB. Free memory was 131.0 MB in the beginning and 121.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:23,103 INFO L168 Benchmark]: Boogie Preprocessor took 31.65 ms. Allocated memory is still 155.2 MB. Free memory was 121.6 MB in the beginning and 120.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:23,105 INFO L168 Benchmark]: RCFGBuilder took 335.65 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 105.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:23,110 INFO L168 Benchmark]: TraceAbstraction took 1583.85 ms. Allocated memory is still 155.2 MB. Free memory was 105.3 MB in the beginning and 66.2 MB in the end (delta: 39.1 MB). Peak memory consumption was 38.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:23,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 155.2 MB. Free memory was 128.9 MB in the beginning and 128.7 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.40 ms. Allocated memory is still 155.2 MB. Free memory was 131.0 MB in the beginning and 121.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.65 ms. Allocated memory is still 155.2 MB. Free memory was 121.6 MB in the beginning and 120.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 335.65 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 105.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1583.85 ms. Allocated memory is still 155.2 MB. Free memory was 105.3 MB in the beginning and 66.2 MB in the end (delta: 39.1 MB). Peak memory consumption was 38.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_int(), sn=0; [L23] int i, n=__VERIFIER_nondet_int(), sn=0; [L23] int i, n=__VERIFIER_nondet_int(), sn=0; [L24] COND FALSE !(!(n < 1000 && n >= -1000)) [L25] i=1 [L25] COND TRUE i<=n [L26] sn = sn + (2) [L25] i++ [L25] COND FALSE !(i<=n) [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 42 SDslu, 42 SDs, 0 SdLazy, 65 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, 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 proved your program to be incorrect! Received shutdown request...