/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/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:47:02,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:47:02,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:47:02,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:47:02,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:47:02,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:47:02,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:47:02,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:47:02,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:47:02,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:47:02,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:47:02,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:47:02,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:47:02,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:47:02,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:47:02,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:47:02,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:47:02,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:47:02,736 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:47:02,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:47:02,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:47:02,749 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:47:02,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:47:02,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:47:02,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:47:02,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:47:02,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:47:02,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:47:02,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:47:02,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:47:02,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:47:02,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:47:02,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:47:02,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:47:02,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:47:02,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:47:02,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:47:02,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:47:02,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:47:02,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:47:02,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:47:02,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:47:02,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:47:02,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:47:02,833 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:47:02,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:47:02,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:47:02,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:02,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:47:02,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:47:02,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:47:02,835 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:47:02,835 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:47:03,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:47:03,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:47:03,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:47:03,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:47:03,252 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:47:03,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2021-02-24 04:47:03,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25348ae45/1c497348bd1c4c7fb4daaa8d163c6294/FLAG7350598d5 [2021-02-24 04:47:03,932 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:47:03,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-2.c [2021-02-24 04:47:03,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25348ae45/1c497348bd1c4c7fb4daaa8d163c6294/FLAG7350598d5 [2021-02-24 04:47:04,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25348ae45/1c497348bd1c4c7fb4daaa8d163c6294 [2021-02-24 04:47:04,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:47:04,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:47:04,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:04,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:47:04,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:47:04,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2572c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04, skipping insertion in model container [2021-02-24 04:47:04,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:47:04,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:47:04,513 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/array-2.c[319,332] [2021-02-24 04:47:04,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:04,540 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:47:04,554 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/array-2.c[319,332] [2021-02-24 04:47:04,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:04,579 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:47:04,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04 WrapperNode [2021-02-24 04:47:04,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:04,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:47:04,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:47:04,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:47:04,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... [2021-02-24 04:47:04,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:47:04,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:47:04,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:47:04,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:47:04,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:04,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:47:04,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:47:04,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:47:04,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:47:04,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:47:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:47:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:47:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:47:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:47:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:47:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:47:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:47:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:47:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:47:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:47:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:47:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:47:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:47:05,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:47:05,280 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:47:05,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:05 BoogieIcfgContainer [2021-02-24 04:47:05,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:47:05,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:47:05,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:47:05,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:47:05,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:47:04" (1/3) ... [2021-02-24 04:47:05,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f405f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:05, skipping insertion in model container [2021-02-24 04:47:05,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:04" (2/3) ... [2021-02-24 04:47:05,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f405f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:05, skipping insertion in model container [2021-02-24 04:47:05,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:05" (3/3) ... [2021-02-24 04:47:05,296 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2021-02-24 04:47:05,305 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:47:05,310 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:47:05,332 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:47:05,371 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:47:05,371 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:47:05,371 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:47:05,371 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:47:05,372 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:47:05,372 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:47:05,372 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:47:05,372 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:47:05,395 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2021-02-24 04:47:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 04:47:05,415 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:05,416 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] [2021-02-24 04:47:05,416 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:05,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1410802408, now seen corresponding path program 1 times [2021-02-24 04:47:05,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:05,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166745674] [2021-02-24 04:47:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:05,540 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:05,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:05,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:05,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:05,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:47:05,861 WARN L141 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-02-24 04:47:05,863 WARN L147 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size 17 [2021-02-24 04:47:05,876 WARN L141 QuantifierPusher]: treesize reduction 2, result has 93.1 percent of original size [2021-02-24 04:47:05,878 WARN L147 QuantifierPusher]: treesize reduction 2, result has 93.1 percent of original size 27 [2021-02-24 04:47:05,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:05,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:05,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:05,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:05,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:06,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166745674] [2021-02-24 04:47:06,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:06,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 04:47:06,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264824742] [2021-02-24 04:47:06,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 04:47:06,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:06,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 04:47:06,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:47:06,037 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 5 states. [2021-02-24 04:47:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:06,380 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-02-24 04:47:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-24 04:47:06,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-02-24 04:47:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:06,391 INFO L225 Difference]: With dead ends: 81 [2021-02-24 04:47:06,392 INFO L226 Difference]: Without dead ends: 54 [2021-02-24 04:47:06,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:47:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-02-24 04:47:06,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2021-02-24 04:47:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-24 04:47:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-24 04:47:06,449 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 27 [2021-02-24 04:47:06,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:06,450 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-24 04:47:06,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 04:47:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-24 04:47:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 04:47:06,452 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:06,452 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] [2021-02-24 04:47:06,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:47:06,453 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1185701142, now seen corresponding path program 1 times [2021-02-24 04:47:06,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:06,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820190182] [2021-02-24 04:47:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:22,885 WARN L202 SmtUtils]: Spent 16.40 s on a formula simplification. DAG size of input: 164 DAG size of output: 164 [2021-02-24 04:47:22,903 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 04:47:22,911 INFO L168 Benchmark]: Toolchain (without parser) took 18598.90 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 112.3 MB in the beginning and 105.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 57.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:22,912 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:47:22,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 153.1 MB. Free memory was 111.2 MB in the beginning and 130.9 MB in the end (delta: -19.7 MB). Peak memory consumption was 6.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:22,913 INFO L168 Benchmark]: Boogie Preprocessor took 41.81 ms. Allocated memory is still 153.1 MB. Free memory was 130.9 MB in the beginning and 129.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:22,914 INFO L168 Benchmark]: RCFGBuilder took 659.58 ms. Allocated memory is still 153.1 MB. Free memory was 129.4 MB in the beginning and 121.7 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:22,915 INFO L168 Benchmark]: TraceAbstraction took 17622.05 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 121.2 MB in the beginning and 105.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:22,919 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 153.1 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 153.1 MB. Free memory was 111.2 MB in the beginning and 130.9 MB in the end (delta: -19.7 MB). Peak memory consumption was 6.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.81 ms. Allocated memory is still 153.1 MB. Free memory was 130.9 MB in the beginning and 129.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 659.58 ms. Allocated memory is still 153.1 MB. Free memory was 129.4 MB in the beginning and 121.7 MB in the end (delta: 7.7 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17622.05 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 121.2 MB in the beginning and 105.1 MB in the end (delta: 16.1 MB). Peak memory consumption was 65.9 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...