/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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:57,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:57,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:57,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:48:57,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:48:57,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:48:57,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:48:57,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:48:57,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:48:57,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:48:57,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:48:57,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:48:57,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:57,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:57,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:57,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:57,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:57,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:57,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:57,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:57,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:57,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:57,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:57,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:57,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:57,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:57,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:57,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:57,422 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 04:48:57,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:57,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:57,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:57,452 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:57,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:57,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:57,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:57,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:57,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:57,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:57,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:57,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:57,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:57,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:57,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:57,456 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:57,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:57,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:57,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:57,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:57,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:57,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:57,458 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:57,458 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:57,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:57,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:57,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:57,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:57,907 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:57,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2021-02-24 04:48:58,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6478b4a31/b43661af3d3949d4bf9114c0e3fdd18a/FLAG3181c0f27 [2021-02-24 04:48:58,624 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:58,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2021-02-24 04:48:58,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6478b4a31/b43661af3d3949d4bf9114c0e3fdd18a/FLAG3181c0f27 [2021-02-24 04:48:59,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6478b4a31/b43661af3d3949d4bf9114c0e3fdd18a [2021-02-24 04:48:59,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:59,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:59,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:59,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:59,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:59,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7354e424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59, skipping insertion in model container [2021-02-24 04:48:59,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:59,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:59,221 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-lit/afnp2014.i[895,908] [2021-02-24 04:48:59,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:59,242 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:48:59,258 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-lit/afnp2014.i[895,908] [2021-02-24 04:48:59,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:59,279 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:48:59,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59 WrapperNode [2021-02-24 04:48:59,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:59,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:48:59,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:48:59,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:48:59,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (1/1) ... [2021-02-24 04:48:59,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:48:59,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:48:59,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:48:59,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:48:59,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (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 [2021-02-24 04:48:59,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:48:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:48:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:48:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:48:59,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:48:59,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:48:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:48:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:48:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:48:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:48:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:48:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:48:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:48:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:48:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:48:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:48:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:48:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:48:59,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:48:59,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:48:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:48:59,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:49:00,067 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:49:00,068 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:49:00,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:00 BoogieIcfgContainer [2021-02-24 04:49:00,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:49:00,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:49:00,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:49:00,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:49:00,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:59" (1/3) ... [2021-02-24 04:49:00,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bad587a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:00, skipping insertion in model container [2021-02-24 04:49:00,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:59" (2/3) ... [2021-02-24 04:49:00,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bad587a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:49:00, skipping insertion in model container [2021-02-24 04:49:00,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:49:00" (3/3) ... [2021-02-24 04:49:00,086 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2021-02-24 04:49:00,094 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:49:00,099 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:49:00,121 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:49:00,147 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:49:00,147 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:49:00,147 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:49:00,147 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:49:00,147 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:49:00,148 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:49:00,148 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:49:00,148 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:49:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2021-02-24 04:49:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-24 04:49:00,173 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:00,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:49:00,175 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash 613655507, now seen corresponding path program 1 times [2021-02-24 04:49:00,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:00,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936353542] [2021-02-24 04:49:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:00,269 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:49:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:00,432 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:00,444 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:00,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:49:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:00,517 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,518 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:00,522 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 04:49:00,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936353542] [2021-02-24 04:49:00,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:49:00,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:49:00,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186625455] [2021-02-24 04:49:00,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:49:00,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:49:00,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:49:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:49:00,547 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2021-02-24 04:49:00,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:49:00,621 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-02-24 04:49:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:49:00,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-02-24 04:49:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:49:00,631 INFO L225 Difference]: With dead ends: 49 [2021-02-24 04:49:00,631 INFO L226 Difference]: Without dead ends: 29 [2021-02-24 04:49:00,635 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 04:49:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-02-24 04:49:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-02-24 04:49:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-02-24 04:49:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-02-24 04:49:00,685 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 18 [2021-02-24 04:49:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:49:00,686 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-02-24 04:49:00,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:49:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-02-24 04:49:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-24 04:49:00,687 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:00,687 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] [2021-02-24 04:49:00,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:49:00,688 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -495401181, now seen corresponding path program 1 times [2021-02-24 04:49:00,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:00,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462310390] [2021-02-24 04:49:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:00,693 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:49:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:00,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:00,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:49:00,852 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-24 04:49:00,853 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-24 04:49:00,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:49:00,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:49:00,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:00,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:49:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:49:00,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:49:00,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:49:00,966 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 04:49:00,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462310390] [2021-02-24 04:49:00,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:49:00,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:49:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272879931] [2021-02-24 04:49:00,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:49:00,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:49:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:49:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:49:00,976 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2021-02-24 04:49:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:49:01,339 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-02-24 04:49:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:49:01,342 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2021-02-24 04:49:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:49:01,344 INFO L225 Difference]: With dead ends: 45 [2021-02-24 04:49:01,344 INFO L226 Difference]: Without dead ends: 38 [2021-02-24 04:49:01,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-24 04:49:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-02-24 04:49:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-02-24 04:49:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-24 04:49:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-02-24 04:49:01,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2021-02-24 04:49:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:49:01,374 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-02-24 04:49:01,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:49:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-02-24 04:49:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 04:49:01,378 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:49:01,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 04:49:01,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:49:01,379 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:49:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:49:01,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1815760705, now seen corresponding path program 1 times [2021-02-24 04:49:01,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:49:01,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423375229] [2021-02-24 04:49:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:49:01,399 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) [2021-02-24 04:49:01,407 INFO L168 Benchmark]: Toolchain (without parser) took 2375.73 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 116.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:01,408 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:49:01,410 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:01,413 INFO L168 Benchmark]: Boogie Preprocessor took 39.32 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:01,417 INFO L168 Benchmark]: RCFGBuilder took 751.58 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 133.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:01,418 INFO L168 Benchmark]: TraceAbstraction took 1328.31 ms. Allocated memory is still 151.0 MB. Free memory was 132.8 MB in the beginning and 116.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:49:01,431 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 151.0 MB. Free memory is still 125.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.62 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.32 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 751.58 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 133.3 MB in the end (delta: -17.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1328.31 ms. Allocated memory is still 151.0 MB. Free memory was 132.8 MB in the beginning and 116.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 18.7 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...