/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/array-fpi/brs1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:19:43,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:19:43,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:19:43,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:19:43,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:19:43,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:19:43,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:19:43,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:19:43,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:19:43,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:19:43,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:19:43,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:19:43,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:19:43,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:19:43,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:19:43,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:19:43,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:19:43,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:19:43,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:19:43,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:19:43,973 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 02:19:44,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:19:44,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:19:44,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:19:44,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:19:44,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:19:44,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:19:44,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:19:44,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:19:44,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:19:44,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:19:44,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:19:44,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:19:44,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:19:44,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:19:44,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:19:44,014 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:19:44,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:19:44,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:19:44,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:19:44,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:19:44,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:19:44,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:19:44,016 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:19:44,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:19:44,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:19:44,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:19:44,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:19:44,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:19:44,514 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:19:44,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1f.c [2021-02-22 02:19:44,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f448dee/b3835079bd7f4c2294d090f5b88bc4d8/FLAG6c8ca5f95 [2021-02-22 02:19:45,331 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:19:45,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1f.c [2021-02-22 02:19:45,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f448dee/b3835079bd7f4c2294d090f5b88bc4d8/FLAG6c8ca5f95 [2021-02-22 02:19:45,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f448dee/b3835079bd7f4c2294d090f5b88bc4d8 [2021-02-22 02:19:45,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:19:45,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:19:45,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:45,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:19:45,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:19:45,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:45" (1/1) ... [2021-02-22 02:19:45,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49857363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:45, skipping insertion in model container [2021-02-22 02:19:45,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:45" (1/1) ... [2021-02-22 02:19:45,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:19:45,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:19:45,913 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1f.c[588,601] [2021-02-22 02:19:45,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:45,944 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:19:45,964 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1f.c[588,601] [2021-02-22 02:19:46,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:46,026 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:19:46,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46 WrapperNode [2021-02-22 02:19:46,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:46,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:19:46,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:19:46,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:19:46,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (1/1) ... [2021-02-22 02:19:46,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:19:46,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:19:46,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:19:46,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:19:46,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (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 02:19:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:19:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:19:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:19:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:19:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:19:46,236 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:19:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:19:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:19:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:19:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:19:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:19:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:19:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:19:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:19:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:19:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:19:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:19:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:19:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:19:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:19:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:19:46,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:19:46,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:19:46,821 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:19:46,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:46 BoogieIcfgContainer [2021-02-22 02:19:46,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:19:46,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:19:46,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:19:46,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:19:46,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:19:45" (1/3) ... [2021-02-22 02:19:46,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb817e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:46, skipping insertion in model container [2021-02-22 02:19:46,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:46" (2/3) ... [2021-02-22 02:19:46,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb817e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:46, skipping insertion in model container [2021-02-22 02:19:46,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:46" (3/3) ... [2021-02-22 02:19:46,834 INFO L111 eAbstractionObserver]: Analyzing ICFG brs1f.c [2021-02-22 02:19:46,841 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:19:46,846 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:19:46,867 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:19:46,892 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:19:46,893 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:19:46,893 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:19:46,893 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:19:46,893 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:19:46,893 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:19:46,893 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:19:46,894 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:19:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2021-02-22 02:19:46,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:46,921 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:46,922 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] [2021-02-22 02:19:46,923 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1589495831, now seen corresponding path program 1 times [2021-02-22 02:19:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:46,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004093171] [2021-02-22 02:19:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:47,024 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:47,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:47,253 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:47,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:47,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:47,414 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,416 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:47,429 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 02:19:47,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004093171] [2021-02-22 02:19:47,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:47,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:19:47,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344129568] [2021-02-22 02:19:47,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:19:47,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:19:47,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:19:47,460 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2021-02-22 02:19:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:47,812 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2021-02-22 02:19:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:19:47,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-22 02:19:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:47,823 INFO L225 Difference]: With dead ends: 106 [2021-02-22 02:19:47,824 INFO L226 Difference]: Without dead ends: 51 [2021-02-22 02:19:47,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:19:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-22 02:19:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-02-22 02:19:47,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-22 02:19:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-02-22 02:19:47,894 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 35 [2021-02-22 02:19:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:47,894 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-02-22 02:19:47,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:19:47,895 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-02-22 02:19:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:47,896 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:47,896 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] [2021-02-22 02:19:47,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:19:47,897 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1961847080, now seen corresponding path program 1 times [2021-02-22 02:19:47,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:47,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987925178] [2021-02-22 02:19:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:47,901 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:47,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:47,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,965 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:47,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:19:47,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:47,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:48,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:48,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:48,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:48,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:48,077 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 02:19:48,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987925178] [2021-02-22 02:19:48,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:48,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:19:48,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907622344] [2021-02-22 02:19:48,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:19:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:48,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:19:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:19:48,081 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 5 states. [2021-02-22 02:19:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:48,502 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-02-22 02:19:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:19:48,504 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-22 02:19:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:48,508 INFO L225 Difference]: With dead ends: 78 [2021-02-22 02:19:48,508 INFO L226 Difference]: Without dead ends: 60 [2021-02-22 02:19:48,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:19:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-22 02:19:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-02-22 02:19:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-22 02:19:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-02-22 02:19:48,547 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 35 [2021-02-22 02:19:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:48,548 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-02-22 02:19:48,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:19:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-02-22 02:19:48,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 02:19:48,550 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:48,559 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] [2021-02-22 02:19:48,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:19:48,560 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:48,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2023038414, now seen corresponding path program 1 times [2021-02-22 02:19:48,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:48,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892436413] [2021-02-22 02:19:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:48,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:48,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:48,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:48,659 WARN L141 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-02-22 02:19:48,674 WARN L147 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size 19 [2021-02-22 02:19:48,680 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:19:48,688 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:19:48,691 WARN L141 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size [2021-02-22 02:19:48,692 WARN L147 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size 3 [2021-02-22 02:19:48,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:48,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:48,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:48,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:48,706 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-22 02:19:48,709 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-22 02:19:48,709 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:19:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:48,759 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:48,821 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:48,908 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:19:48,908 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:19:48,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:19:48,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:19:48 BoogieIcfgContainer [2021-02-22 02:19:48,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:19:48,938 INFO L168 Benchmark]: Toolchain (without parser) took 3271.83 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 149.1 MB in the beginning and 186.7 MB in the end (delta: -37.6 MB). Peak memory consumption was 93.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:48,940 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 172.0 MB. Free memory was 144.6 MB in the beginning and 144.4 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:19:48,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.57 ms. Allocated memory is still 172.0 MB. Free memory was 147.9 MB in the beginning and 138.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:48,948 INFO L168 Benchmark]: Boogie Preprocessor took 75.83 ms. Allocated memory is still 172.0 MB. Free memory was 138.1 MB in the beginning and 136.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:48,949 INFO L168 Benchmark]: RCFGBuilder took 719.22 ms. Allocated memory is still 172.0 MB. Free memory was 136.4 MB in the beginning and 153.6 MB in the end (delta: -17.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:48,950 INFO L168 Benchmark]: TraceAbstraction took 2108.35 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 153.6 MB in the beginning and 186.7 MB in the end (delta: -33.1 MB). Peak memory consumption was 96.9 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:48,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 172.0 MB. Free memory was 144.6 MB in the beginning and 144.4 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 344.57 ms. Allocated memory is still 172.0 MB. Free memory was 147.9 MB in the beginning and 138.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.83 ms. Allocated memory is still 172.0 MB. Free memory was 138.1 MB in the beginning and 136.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 719.22 ms. Allocated memory is still 172.0 MB. Free memory was 136.4 MB in the beginning and 153.6 MB in the end (delta: -17.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2108.35 ms. Allocated memory was 172.0 MB in the beginning and 206.6 MB in the end (delta: 34.6 MB). Free memory was 153.6 MB in the beginning and 186.7 MB in the end (delta: -33.1 MB). Peak memory consumption was 96.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 [L31] COND TRUE i