/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/eca-rers2012/Problem10_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:15:10,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:15:10,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:15:10,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:15:10,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:15:10,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:15:10,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:15:10,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:15:10,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:15:10,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:15:10,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:15:10,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:15:10,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:15:10,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:15:10,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:15:10,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:15:10,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:15:10,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:15:10,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:15:10,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:15:10,512 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 02:15:10,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:15:10,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:15:10,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:15:10,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:15:10,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:15:10,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:15:10,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:15:10,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:15:10,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:15:10,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:15:10,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:15:10,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:15:10,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:15:10,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:15:10,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:15:10,548 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:15:10,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:15:10,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:15:10,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:15:10,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:15:10,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:15:10,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:15:10,549 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:15:10,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:15:10,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:15:11,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:15:11,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:15:11,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:15:11,021 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:15:11,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2021-02-22 02:15:11,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75eb294b/5590401130e94529b3f62d9540a59b96/FLAG6a6c31ecc [2021-02-22 02:15:11,901 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:15:11,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label17.c [2021-02-22 02:15:11,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75eb294b/5590401130e94529b3f62d9540a59b96/FLAG6a6c31ecc [2021-02-22 02:15:12,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75eb294b/5590401130e94529b3f62d9540a59b96 [2021-02-22 02:15:12,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:15:12,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:15:12,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:15:12,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:15:12,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:15:12,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:12,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467cc3bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12, skipping insertion in model container [2021-02-22 02:15:12,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:12,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:15:12,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:15:12,480 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label17.c[3604,3617] [2021-02-22 02:15:12,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:15:12,734 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:15:12,785 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label17.c[3604,3617] [2021-02-22 02:15:12,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:15:12,944 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:15:12,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12 WrapperNode [2021-02-22 02:15:12,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:15:12,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:15:12,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:15:12,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:15:12,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:12,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:12,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:12,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:13,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:13,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:13,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (1/1) ... [2021-02-22 02:15:13,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:15:13,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:15:13,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:15:13,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:15:13,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (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 02:15:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:15:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:15:13,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:15:13,218 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2021-02-22 02:15:13,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:15:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2021-02-22 02:15:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:15:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:15:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:15:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:15:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:15:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-22 02:15:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:15:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:15:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:15:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:15:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:15:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:15:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:15:15,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:15:15,172 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:15:15,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:15:15 BoogieIcfgContainer [2021-02-22 02:15:15,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:15:15,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:15:15,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:15:15,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:15:15,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:15:12" (1/3) ... [2021-02-22 02:15:15,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dafcd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:15:15, skipping insertion in model container [2021-02-22 02:15:15,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:15:12" (2/3) ... [2021-02-22 02:15:15,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dafcd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:15:15, skipping insertion in model container [2021-02-22 02:15:15,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:15:15" (3/3) ... [2021-02-22 02:15:15,184 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label17.c [2021-02-22 02:15:15,215 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:15:15,221 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:15:15,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:15:15,268 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:15:15,268 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:15:15,269 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:15:15,269 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:15:15,269 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:15:15,269 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:15:15,269 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:15:15,269 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:15:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2021-02-22 02:15:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-22 02:15:15,310 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:15:15,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:15:15,311 INFO L428 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:15:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:15:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2039386155, now seen corresponding path program 1 times [2021-02-22 02:15:15,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:15:15,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800663715] [2021-02-22 02:15:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:15:15,411 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:15:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:15:15,650 WARN L141 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size [2021-02-22 02:15:15,652 WARN L147 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size 4 [2021-02-22 02:15:15,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:15:15,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:15:15,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:15:15,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:15:15,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:15:15,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:15:15,787 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-22 02:15:15,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:15:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:15:15,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:15:15,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:15:15,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:15:15,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:15:15,859 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 02:15:15,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800663715] [2021-02-22 02:15:15,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:15:15,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:15:15,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57316239] [2021-02-22 02:15:15,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:15:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:15:15,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:15:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:15:15,902 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 5 states. [2021-02-22 02:15:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:15:19,566 INFO L93 Difference]: Finished difference Result 1235 states and 1806 transitions. [2021-02-22 02:15:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 02:15:19,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2021-02-22 02:15:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:15:19,600 INFO L225 Difference]: With dead ends: 1235 [2021-02-22 02:15:19,600 INFO L226 Difference]: Without dead ends: 715 [2021-02-22 02:15:19,614 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 02:15:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-02-22 02:15:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 703. [2021-02-22 02:15:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2021-02-22 02:15:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 934 transitions. [2021-02-22 02:15:19,894 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 934 transitions. Word has length 57 [2021-02-22 02:15:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:15:19,896 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 934 transitions. [2021-02-22 02:15:19,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:15:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 934 transitions. [2021-02-22 02:15:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-02-22 02:15:19,917 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:15:19,918 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 02:15:19,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:15:19,918 INFO L428 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:15:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:15:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1505593866, now seen corresponding path program 1 times [2021-02-22 02:15:19,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:15:19,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590555386] [2021-02-22 02:15:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:15:20,356 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 81 [2021-02-22 02:15:20,365 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 02:15:20,370 INFO L168 Benchmark]: Toolchain (without parser) took 8223.17 ms. Allocated memory was 152.0 MB in the beginning and 229.6 MB in the end (delta: 77.6 MB). Free memory was 127.3 MB in the beginning and 114.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:15:20,371 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 152.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:15:20,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 782.31 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 130.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:15:20,373 INFO L168 Benchmark]: Boogie Preprocessor took 153.24 ms. Allocated memory is still 152.0 MB. Free memory was 129.8 MB in the beginning and 125.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-02-22 02:15:20,374 INFO L168 Benchmark]: RCFGBuilder took 2072.09 ms. Allocated memory is still 152.0 MB. Free memory was 125.1 MB in the beginning and 63.5 MB in the end (delta: 61.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:15:20,375 INFO L168 Benchmark]: TraceAbstraction took 5192.07 ms. Allocated memory was 152.0 MB in the beginning and 229.6 MB in the end (delta: 77.6 MB). Free memory was 63.0 MB in the beginning and 114.9 MB in the end (delta: -51.9 MB). Peak memory consumption was 25.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:15:20,379 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 152.0 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 782.31 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 130.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 153.24 ms. Allocated memory is still 152.0 MB. Free memory was 129.8 MB in the beginning and 125.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 2072.09 ms. Allocated memory is still 152.0 MB. Free memory was 125.1 MB in the beginning and 63.5 MB in the end (delta: 61.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5192.07 ms. Allocated memory was 152.0 MB in the beginning and 229.6 MB in the end (delta: 77.6 MB). Free memory was 63.0 MB in the beginning and 114.9 MB in the end (delta: -51.9 MB). Peak memory consumption was 25.7 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...