/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:18:42,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:18:42,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:18:43,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 21:18:43,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 21:18:43,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 21:18:43,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 21:18:43,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 21:18:43,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 21:18:43,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 21:18:43,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 21:18:43,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 21:18:43,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:18:43,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:18:43,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:18:43,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:18:43,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:18:43,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:18:43,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:18:43,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:18:43,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:18:43,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:18:43,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:18:43,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:18:43,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:18:43,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:18:43,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:18:43,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:18:43,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:18:43,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:18:43,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:18:43,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:18:43,134 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:18:43,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:18:43,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:18:43,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:18:43,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:18:43,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:18:43,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:18:43,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:18:43,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:18:43,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:18:43,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:18:43,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:18:43,137 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:18:43,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:18:43,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:18:43,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:18:43,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:18:43,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:18:43,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:18:43,138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:18:43,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:18:43,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:18:43,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:18:43,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:18:43,697 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:18:43,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_2-2.c [2021-02-21 21:18:43,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6befeba/e443e9f930814adb91ef511becbf4c28/FLAG7e9d7b927 [2021-02-21 21:18:44,471 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:18:44,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_2-2.c [2021-02-21 21:18:44,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6befeba/e443e9f930814adb91ef511becbf4c28/FLAG7e9d7b927 [2021-02-21 21:18:44,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b6befeba/e443e9f930814adb91ef511becbf4c28 [2021-02-21 21:18:44,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:18:44,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:18:44,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:44,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:18:44,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:18:44,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:44" (1/1) ... [2021-02-21 21:18:44,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77dff384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:44, skipping insertion in model container [2021-02-21 21:18:44,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:18:44" (1/1) ... [2021-02-21 21:18:44,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:18:44,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:18:45,167 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-acceleration/simple_2-2.c[372,385] [2021-02-21 21:18:45,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:45,203 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:18:45,220 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-acceleration/simple_2-2.c[372,385] [2021-02-21 21:18:45,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:18:45,246 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:18:45,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45 WrapperNode [2021-02-21 21:18:45,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:18:45,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:18:45,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:18:45,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:18:45,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,285 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (1/1) ... [2021-02-21 21:18:45,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:18:45,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:18:45,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:18:45,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:18:45,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (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 [2021-02-21 21:18:45,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:18:45,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:18:45,441 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:18:45,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:18:45,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:18:45,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:18:45,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:18:45,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:18:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:18:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:18:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:18:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:18:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:18:45,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:18:45,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:18:45,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:18:45,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:18:45,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:18:45,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:18:45,745 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:18:45,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:45 BoogieIcfgContainer [2021-02-21 21:18:45,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:18:45,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:18:45,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:18:45,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:18:45,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:18:44" (1/3) ... [2021-02-21 21:18:45,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50588bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:45, skipping insertion in model container [2021-02-21 21:18:45,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:18:45" (2/3) ... [2021-02-21 21:18:45,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50588bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:18:45, skipping insertion in model container [2021-02-21 21:18:45,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:18:45" (3/3) ... [2021-02-21 21:18:45,759 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_2-2.c [2021-02-21 21:18:45,767 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:18:45,771 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:18:45,795 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:18:45,833 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:18:45,833 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:18:45,833 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:18:45,833 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:18:45,834 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:18:45,834 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:18:45,834 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:18:45,834 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:18:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-21 21:18:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 21:18:45,863 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:45,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:45,865 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1794219334, now seen corresponding path program 1 times [2021-02-21 21:18:45,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:45,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447313778] [2021-02-21 21:18:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:46,009 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:46,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:46,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:46,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:46,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:46,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:18:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:18:46,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:18:46,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:18:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:18:46,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447313778] [2021-02-21 21:18:46,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:18:46,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:18:46,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652143952] [2021-02-21 21:18:46,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:18:46,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:18:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:18:46,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:46,425 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2021-02-21 21:18:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:18:46,538 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-02-21 21:18:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:18:46,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-02-21 21:18:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:18:46,550 INFO L225 Difference]: With dead ends: 41 [2021-02-21 21:18:46,550 INFO L226 Difference]: Without dead ends: 23 [2021-02-21 21:18:46,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:18:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-02-21 21:18:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-02-21 21:18:46,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-02-21 21:18:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-02-21 21:18:46,607 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2021-02-21 21:18:46,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:18:46,608 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-02-21 21:18:46,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:18:46,609 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-02-21 21:18:46,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 21:18:46,610 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:18:46,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:18:46,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:18:46,611 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:18:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:18:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1800683981, now seen corresponding path program 1 times [2021-02-21 21:18:46,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:18:46,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065248191] [2021-02-21 21:18:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:18:46,616 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:18:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:18:46,659 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:18:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:18:46,682 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:18:46,711 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:18:46,711 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:18:46,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:18:46,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:18:46 BoogieIcfgContainer [2021-02-21 21:18:46,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:18:46,733 INFO L168 Benchmark]: Toolchain (without parser) took 1867.09 ms. Allocated memory is still 175.1 MB. Free memory was 151.3 MB in the beginning and 130.9 MB in the end (delta: 20.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:46,734 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 175.1 MB. Free memory is still 157.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:18:46,735 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.41 ms. Allocated memory is still 175.1 MB. Free memory was 150.2 MB in the beginning and 141.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:46,736 INFO L168 Benchmark]: Boogie Preprocessor took 63.25 ms. Allocated memory is still 175.1 MB. Free memory was 141.0 MB in the beginning and 139.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:46,737 INFO L168 Benchmark]: RCFGBuilder took 433.82 ms. Allocated memory is still 175.1 MB. Free memory was 139.6 MB in the beginning and 126.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:18:46,738 INFO L168 Benchmark]: TraceAbstraction took 980.83 ms. Allocated memory is still 175.1 MB. Free memory was 126.2 MB in the beginning and 130.9 MB in the end (delta: -4.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:18:46,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 175.1 MB. Free memory is still 157.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 361.41 ms. Allocated memory is still 175.1 MB. Free memory was 150.2 MB in the beginning and 141.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.25 ms. Allocated memory is still 175.1 MB. Free memory was 141.0 MB in the beginning and 139.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 433.82 ms. Allocated memory is still 175.1 MB. Free memory was 139.6 MB in the beginning and 126.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 980.83 ms. Allocated memory is still 175.1 MB. Free memory was 126.2 MB in the beginning and 130.9 MB in the end (delta: -4.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = __VERIFIER_nondet_uint(); [L16] COND FALSE !(x < 0x0fffffff) [L20] CALL __VERIFIER_assert(x > 0x0fffffff) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 13 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...