/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/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:19:47,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:19:47,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:19:47,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:19:47,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:19:47,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:19:47,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:19:47,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:19:47,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:19:47,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:19:47,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:19:47,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:19:47,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:19:47,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:19:47,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:19:47,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:19:47,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:19:47,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:19:47,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:19:47,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:19:47,342 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 02:19:47,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:19:47,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:19:47,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:19:47,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:19:47,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:19:47,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:19:47,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:19:47,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:19:47,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:19:47,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:19:47,371 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:19:47,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:19:47,372 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:19:47,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:19:47,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:19:47,373 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:19:47,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:19:47,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:19:47,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:19:47,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:19:47,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:19:47,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:19:47,374 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:19:47,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:19:47,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:19:47,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:19:47,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:19:47,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:19:47,803 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:19:47,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2021-02-22 02:19:47,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc46f367/fd37352ebe9046bd949171b9b3c57fca/FLAG6c84dad2e [2021-02-22 02:19:48,477 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:19:48,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs4f.c [2021-02-22 02:19:48,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc46f367/fd37352ebe9046bd949171b9b3c57fca/FLAG6c84dad2e [2021-02-22 02:19:48,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc46f367/fd37352ebe9046bd949171b9b3c57fca [2021-02-22 02:19:48,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:19:48,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:19:48,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:48,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:19:48,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:19:48,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee56dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:48, skipping insertion in model container [2021-02-22 02:19:48,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:19:48" (1/1) ... [2021-02-22 02:19:48,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:19:48,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:19:49,048 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/brs4f.c[588,601] [2021-02-22 02:19:49,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:49,074 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:19:49,086 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/brs4f.c[588,601] [2021-02-22 02:19:49,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:19:49,109 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:19:49,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49 WrapperNode [2021-02-22 02:19:49,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:19:49,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:19:49,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:19:49,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:19:49,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (1/1) ... [2021-02-22 02:19:49,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:19:49,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:19:49,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:19:49,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:19:49,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (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 02:19:49,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:19:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:19:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:19:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:19:49,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:19:49,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:19:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:19:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:19:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:19:49,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:19:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:19:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:19:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:19:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-22 02:19:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:19:49,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-22 02:19:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:19:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:19:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:19:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:19:49,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:19:49,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:19:49,742 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:19:49,743 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-22 02:19:49,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:49 BoogieIcfgContainer [2021-02-22 02:19:49,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:19:49,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:19:49,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:19:49,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:19:49,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:19:48" (1/3) ... [2021-02-22 02:19:49,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5683f981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:49, skipping insertion in model container [2021-02-22 02:19:49,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:19:49" (2/3) ... [2021-02-22 02:19:49,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5683f981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:19:49, skipping insertion in model container [2021-02-22 02:19:49,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:19:49" (3/3) ... [2021-02-22 02:19:49,760 INFO L111 eAbstractionObserver]: Analyzing ICFG brs4f.c [2021-02-22 02:19:49,771 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:19:49,776 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:19:49,795 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:19:49,830 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:19:49,830 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:19:49,830 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:19:49,830 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:19:49,831 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:19:49,831 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:19:49,831 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:19:49,831 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:19:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2021-02-22 02:19:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:49,868 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:49,869 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 02:19:49,869 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1589495831, now seen corresponding path program 1 times [2021-02-22 02:19:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:49,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827078251] [2021-02-22 02:19:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:49,985 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,209 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,212 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,287 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 02:19:50,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827078251] [2021-02-22 02:19:50,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:50,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:19:50,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015883810] [2021-02-22 02:19:50,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:19:50,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:50,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:19:50,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:19:50,313 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2021-02-22 02:19:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:50,462 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-02-22 02:19:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:19:50,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2021-02-22 02:19:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:50,472 INFO L225 Difference]: With dead ends: 107 [2021-02-22 02:19:50,472 INFO L226 Difference]: Without dead ends: 52 [2021-02-22 02:19:50,476 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 02:19:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-22 02:19:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-02-22 02:19:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-22 02:19:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-22 02:19:50,524 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-02-22 02:19:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:50,524 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-22 02:19:50,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:19:50,525 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-22 02:19:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-22 02:19:50,526 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:50,526 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 02:19:50,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:19:50,527 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1961847080, now seen corresponding path program 1 times [2021-02-22 02:19:50,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:50,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773540967] [2021-02-22 02:19:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:50,533 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:19:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,594 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:19:50,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:19:50,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:19:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-22 02:19:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:19:50,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:50,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:50,713 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 02:19:50,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773540967] [2021-02-22 02:19:50,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:19:50,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-22 02:19:50,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734884862] [2021-02-22 02:19:50,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-22 02:19:50,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:19:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-22 02:19:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-22 02:19:50,721 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 5 states. [2021-02-22 02:19:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:19:50,988 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-02-22 02:19:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-22 02:19:50,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2021-02-22 02:19:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:19:50,990 INFO L225 Difference]: With dead ends: 86 [2021-02-22 02:19:50,991 INFO L226 Difference]: Without dead ends: 61 [2021-02-22 02:19:50,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-22 02:19:50,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-22 02:19:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-02-22 02:19:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-22 02:19:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-02-22 02:19:51,007 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 35 [2021-02-22 02:19:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:19:51,008 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-02-22 02:19:51,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-22 02:19:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-02-22 02:19:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 02:19:51,010 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:19:51,010 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 02:19:51,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:19:51,011 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:19:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:19:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2023038414, now seen corresponding path program 1 times [2021-02-22 02:19:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:19:51,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286272019] [2021-02-22 02:19:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:19:51,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-22 02:19:51,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,091 WARN L141 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size [2021-02-22 02:19:51,103 WARN L147 QuantifierPusher]: treesize reduction 9, result has 67.9 percent of original size 19 [2021-02-22 02:19:51,108 WARN L141 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size [2021-02-22 02:19:51,115 WARN L147 QuantifierPusher]: treesize reduction 2, result has 84.6 percent of original size 11 [2021-02-22 02:19:51,118 WARN L141 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size [2021-02-22 02:19:51,119 WARN L147 QuantifierPusher]: treesize reduction 25, result has 10.7 percent of original size 3 [2021-02-22 02:19:51,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:51,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-22 02:19:51,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:19:51,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:19:51,127 WARN L141 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size [2021-02-22 02:19:51,129 WARN L147 QuantifierPusher]: treesize reduction 8, result has 63.6 percent of original size 14 [2021-02-22 02:19:51,130 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:19:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:51,187 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:19:51,220 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:19:51,259 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:19:51,259 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:19:51,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-22 02:19:51,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:19:51 BoogieIcfgContainer [2021-02-22 02:19:51,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:19:51,280 INFO L168 Benchmark]: Toolchain (without parser) took 2420.80 ms. Allocated memory was 169.9 MB in the beginning and 216.0 MB in the end (delta: 46.1 MB). Free memory was 146.9 MB in the beginning and 193.4 MB in the end (delta: -46.5 MB). Peak memory consumption was 818.3 kB. Max. memory is 8.0 GB. [2021-02-22 02:19:51,281 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 169.9 MB. Free memory is still 142.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:19:51,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.88 ms. Allocated memory is still 169.9 MB. Free memory was 145.8 MB in the beginning and 136.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:51,283 INFO L168 Benchmark]: Boogie Preprocessor took 34.62 ms. Allocated memory is still 169.9 MB. Free memory was 136.1 MB in the beginning and 134.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:51,284 INFO L168 Benchmark]: RCFGBuilder took 598.78 ms. Allocated memory is still 169.9 MB. Free memory was 134.3 MB in the beginning and 151.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:51,285 INFO L168 Benchmark]: TraceAbstraction took 1530.50 ms. Allocated memory was 169.9 MB in the beginning and 216.0 MB in the end (delta: 46.1 MB). Free memory was 151.0 MB in the beginning and 193.4 MB in the end (delta: -42.4 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:19:51,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 169.9 MB. Free memory is still 142.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.88 ms. Allocated memory is still 169.9 MB. Free memory was 145.8 MB in the beginning and 136.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.62 ms. Allocated memory is still 169.9 MB. Free memory was 136.1 MB in the beginning and 134.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 598.78 ms. Allocated memory is still 169.9 MB. Free memory was 134.3 MB in the beginning and 151.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1530.50 ms. Allocated memory was 169.9 MB in the beginning and 216.0 MB in the end (delta: 46.1 MB). Free memory was 151.0 MB in the beginning and 193.4 MB in the end (delta: -42.4 MB). Peak memory consumption was 5.3 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