/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/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:20:57,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:20:57,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:20:57,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:20:57,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:20:57,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:20:57,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:20:57,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:20:57,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:20:57,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:20:57,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:20:57,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:20:57,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:20:57,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:20:57,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:20:57,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:20:57,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:20:57,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:20:57,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:20:57,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:20:57,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:20:57,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:20:57,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:20:57,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:20:57,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-22 02:20:57,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-22 02:20:57,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-22 02:20:57,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-22 02:20:57,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-22 02:20:57,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-22 02:20:57,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-22 02:20:57,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-22 02:20:57,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-22 02:20:57,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-22 02:20:57,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-22 02:20:57,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-22 02:20:57,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-22 02:20:57,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-22 02:20:57,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:20:57,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:20:57,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:20:57,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:20:57,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:20:57,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:20:57,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:20:57,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:20:57,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:20:57,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:20:57,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:20:57,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:20:57,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:20:57,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:20:57,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:20:57,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:20:57,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:20:57,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:20:57,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:20:57,397 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:20:57,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:20:57,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:20:57,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:20:57,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:20:57,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:20:57,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:20:57,399 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:20:57,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:20:57,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:20:57,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:20:57,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:20:57,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:20:57,836 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:20:57,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2021-02-22 02:20:57,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ebe7083/d144fddb50a541b7bfbd5dc582d1fb4a/FLAG7e54aea03 [2021-02-22 02:20:58,553 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:20:58,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2021-02-22 02:20:58,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ebe7083/d144fddb50a541b7bfbd5dc582d1fb4a/FLAG7e54aea03 [2021-02-22 02:20:58,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14ebe7083/d144fddb50a541b7bfbd5dc582d1fb4a [2021-02-22 02:20:58,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:20:58,951 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:20:58,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:58,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:20:58,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:20:58,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:58" (1/1) ... [2021-02-22 02:20:58,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f1d27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:58, skipping insertion in model container [2021-02-22 02:20:58,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:20:58" (1/1) ... [2021-02-22 02:20:58,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:20:58,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:20:59,134 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/nec20.c[356,369] [2021-02-22 02:20:59,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:59,164 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:20:59,179 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/nec20.c[356,369] [2021-02-22 02:20:59,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:20:59,205 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:20:59,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59 WrapperNode [2021-02-22 02:20:59,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:20:59,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:20:59,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:20:59,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:20:59,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (1/1) ... [2021-02-22 02:20:59,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:20:59,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:20:59,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:20:59,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:20:59,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (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 [2021-02-22 02:20:59,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:20:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:20:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:20:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:20:59,384 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:20:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:20:59,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:20:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:20:59,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:20:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:20:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:20:59,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-22 02:20:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:20:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:20:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:20:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:20:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:20:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:20:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:20:59,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:20:59,971 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:20:59,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:59 BoogieIcfgContainer [2021-02-22 02:20:59,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:20:59,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:20:59,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:20:59,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:20:59,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:20:58" (1/3) ... [2021-02-22 02:20:59,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef2caba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:59, skipping insertion in model container [2021-02-22 02:20:59,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:20:59" (2/3) ... [2021-02-22 02:20:59,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef2caba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:20:59, skipping insertion in model container [2021-02-22 02:20:59,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:20:59" (3/3) ... [2021-02-22 02:20:59,985 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2021-02-22 02:20:59,993 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:20:59,999 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:00,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:00,060 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:00,061 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:00,061 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:00,061 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:00,061 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:00,062 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:00,062 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:00,062 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-22 02:21:00,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:21:00,098 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:00,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:00,100 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:00,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2129882840, now seen corresponding path program 1 times [2021-02-22 02:21:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:00,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266105362] [2021-02-22 02:21:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:00,218 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:00,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:00,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:00,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:00,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:00,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:00,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:00,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:00,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266105362] [2021-02-22 02:21:00,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:00,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:00,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671382822] [2021-02-22 02:21:00,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:00,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:00,569 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2021-02-22 02:21:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:00,766 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-02-22 02:21:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:00,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-02-22 02:21:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:00,777 INFO L225 Difference]: With dead ends: 69 [2021-02-22 02:21:00,778 INFO L226 Difference]: Without dead ends: 37 [2021-02-22 02:21:00,781 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 [2021-02-22 02:21:00,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-22 02:21:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-22 02:21:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-22 02:21:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-22 02:21:00,834 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2021-02-22 02:21:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:00,835 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-22 02:21:00,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-22 02:21:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:21:00,837 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:00,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:00,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:00,837 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1900849632, now seen corresponding path program 1 times [2021-02-22 02:21:00,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:00,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447617070] [2021-02-22 02:21:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:00,842 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:00,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:00,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:00,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:00,986 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:01,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:01,023 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-22 02:21:01,024 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-22 02:21:01,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:01,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:01,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:01,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447617070] [2021-02-22 02:21:01,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:01,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:21:01,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037893796] [2021-02-22 02:21:01,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:21:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:01,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:21:01,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:21:01,184 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 5 states. [2021-02-22 02:21:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:01,550 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-02-22 02:21:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 02:21:01,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-02-22 02:21:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:01,554 INFO L225 Difference]: With dead ends: 57 [2021-02-22 02:21:01,555 INFO L226 Difference]: Without dead ends: 51 [2021-02-22 02:21:01,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:21:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-22 02:21:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-02-22 02:21:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-22 02:21:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-22 02:21:01,576 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 31 [2021-02-22 02:21:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:01,576 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-22 02:21:01,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:21:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-22 02:21:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-22 02:21:01,578 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:01,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:01,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:01,579 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1192211008, now seen corresponding path program 1 times [2021-02-22 02:21:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:01,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131906296] [2021-02-22 02:21:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:01,584 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:01,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:01,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:01,729 WARN L141 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size [2021-02-22 02:21:01,733 WARN L147 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size 48 [2021-02-22 02:21:01,810 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size [2021-02-22 02:21:01,812 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size 38 [2021-02-22 02:21:01,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:01,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:01,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:01,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131906296] [2021-02-22 02:21:01,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:01,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:21:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037200597] [2021-02-22 02:21:01,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:21:01,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:01,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:21:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:21:01,891 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 5 states. [2021-02-22 02:21:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:02,253 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-02-22 02:21:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-22 02:21:02,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-02-22 02:21:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:02,258 INFO L225 Difference]: With dead ends: 58 [2021-02-22 02:21:02,258 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 02:21:02,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-22 02:21:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 02:21:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-02-22 02:21:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-22 02:21:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-22 02:21:02,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-02-22 02:21:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:02,289 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-22 02:21:02,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:21:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-22 02:21:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-22 02:21:02,293 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:02,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:21:02,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:21:02,294 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -2094669374, now seen corresponding path program 1 times [2021-02-22 02:21:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:02,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2982138] [2021-02-22 02:21:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:02,801 WARN L202 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-02-22 02:21:02,816 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:183) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-02-22 02:21:02,821 INFO L168 Benchmark]: Toolchain (without parser) took 3878.84 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 128.6 MB in the beginning and 143.6 MB in the end (delta: -15.0 MB). Peak memory consumption was 81.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:02,822 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:21:02,822 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.05 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 117.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:02,823 INFO L168 Benchmark]: Boogie Preprocessor took 40.46 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:02,824 INFO L168 Benchmark]: RCFGBuilder took 725.07 ms. Allocated memory is still 152.0 MB. Free memory was 116.2 MB in the beginning and 132.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:02,826 INFO L168 Benchmark]: TraceAbstraction took 2842.42 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 132.0 MB in the beginning and 143.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 84.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:21:02,834 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 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.05 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 117.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.46 ms. Allocated memory is still 152.0 MB. Free memory was 117.7 MB in the beginning and 116.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 725.07 ms. Allocated memory is still 152.0 MB. Free memory was 116.2 MB in the beginning and 132.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2842.42 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 132.0 MB in the beginning and 143.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 84.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorWernerOverapprox.accelerateLoop(AcceleratorWernerOverapprox.java:55) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...