/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/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:01,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:01,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:01,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:48:01,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:01,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:01,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:01,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:01,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:01,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:01,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:01,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:01,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:01,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:01,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:01,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:01,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:01,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:01,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:01,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:01,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:48:01,215 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:01,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:01,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:01,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:01,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:01,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:01,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:01,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:01,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:01,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:01,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:01,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:01,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:01,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:01,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:01,221 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:01,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:01,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:01,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:01,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:01,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:01,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:01,222 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:01,222 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:01,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:01,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:01,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:01,710 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:01,711 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:01,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2021-02-24 04:48:01,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00cb60a5/a8387455932d4c249f03ab51a6255817/FLAG1ceb826a7 [2021-02-24 04:48:02,475 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:02,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2021-02-24 04:48:02,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00cb60a5/a8387455932d4c249f03ab51a6255817/FLAG1ceb826a7 [2021-02-24 04:48:02,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c00cb60a5/a8387455932d4c249f03ab51a6255817 [2021-02-24 04:48:02,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:02,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:02,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:02,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:02,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:02,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:02" (1/1) ... [2021-02-24 04:48:02,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782a2390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:02, skipping insertion in model container [2021-02-24 04:48:02,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:02" (1/1) ... [2021-02-24 04:48:02,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:02,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:03,035 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-invgen/MADWiFi-encode_ie_ok.i[893,906] [2021-02-24 04:48:03,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:03,062 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:48:03,081 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-invgen/MADWiFi-encode_ie_ok.i[893,906] [2021-02-24 04:48:03,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:03,105 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:48:03,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03 WrapperNode [2021-02-24 04:48:03,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:03,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:48:03,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:48:03,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:48:03,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... [2021-02-24 04:48:03,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:48:03,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:48:03,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:48:03,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:48:03,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:48:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:48:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:48:03,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:48:03,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:48:03,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:48:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:48:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:48:03,266 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:48:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:48:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:48:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:48:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:48:03,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:48:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:48:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:48:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:48:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:48:03,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:48:03,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:48:03,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:48:03,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:48:03,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:48:03,734 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:48:03,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:03 BoogieIcfgContainer [2021-02-24 04:48:03,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:48:03,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:48:03,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:48:03,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:48:03,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:02" (1/3) ... [2021-02-24 04:48:03,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f58bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:03, skipping insertion in model container [2021-02-24 04:48:03,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:03" (2/3) ... [2021-02-24 04:48:03,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f58bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:03, skipping insertion in model container [2021-02-24 04:48:03,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:03" (3/3) ... [2021-02-24 04:48:03,782 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2021-02-24 04:48:03,799 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:48:03,804 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:48:03,827 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:48:03,854 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:48:03,855 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:48:03,855 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:48:03,855 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:48:03,855 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:48:03,855 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:48:03,856 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:48:03,856 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:48:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2021-02-24 04:48:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-24 04:48:03,884 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:03,885 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] [2021-02-24 04:48:03,886 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1838769705, now seen corresponding path program 1 times [2021-02-24 04:48:03,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:03,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325349274] [2021-02-24 04:48:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:03,986 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:04,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:04,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:04,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:04,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,222 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:04,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:04,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:04,288 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,289 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:04,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:04,386 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:04,387 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:04,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325349274] [2021-02-24 04:48:04,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:04,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:48:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461775850] [2021-02-24 04:48:04,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:48:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:48:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:48:04,442 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 8 states. [2021-02-24 04:48:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:05,232 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-02-24 04:48:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:48:05,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-24 04:48:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:05,244 INFO L225 Difference]: With dead ends: 85 [2021-02-24 04:48:05,244 INFO L226 Difference]: Without dead ends: 56 [2021-02-24 04:48:05,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:48:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-24 04:48:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-02-24 04:48:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-24 04:48:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-02-24 04:48:05,330 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 44 [2021-02-24 04:48:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:05,331 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-02-24 04:48:05,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:48:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-02-24 04:48:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-24 04:48:05,334 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:05,334 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:05,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:48:05,335 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -855808377, now seen corresponding path program 1 times [2021-02-24 04:48:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:05,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208672042] [2021-02-24 04:48:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:05,351 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:05,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:05,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:05,454 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,455 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:05,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:48:05,474 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:48:05,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:48:05,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:05,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:05,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:05,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:05,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:05,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-02-24 04:48:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:05,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:05,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:48:05,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208672042] [2021-02-24 04:48:05,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:05,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:48:05,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015388473] [2021-02-24 04:48:05,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:48:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:05,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:48:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:05,568 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 10 states. [2021-02-24 04:48:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:06,030 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-02-24 04:48:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:48:06,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2021-02-24 04:48:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:06,034 INFO L225 Difference]: With dead ends: 66 [2021-02-24 04:48:06,034 INFO L226 Difference]: Without dead ends: 64 [2021-02-24 04:48:06,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-24 04:48:06,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-24 04:48:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-24 04:48:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-24 04:48:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-24 04:48:06,057 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 49 [2021-02-24 04:48:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:06,058 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-24 04:48:06,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:48:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-24 04:48:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-24 04:48:06,061 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:06,061 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:06,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:48:06,062 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:06,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1519335324, now seen corresponding path program 1 times [2021-02-24 04:48:06,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:06,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071380287] [2021-02-24 04:48:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:06,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:06,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:06,138 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size [2021-02-24 04:48:06,153 INFO L723 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2021-02-24 04:48:06,159 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:06,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:06,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-02-24 04:48:06,182 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size 32 [2021-02-24 04:48:06,190 WARN L141 QuantifierPusher]: treesize reduction 13, result has 83.5 percent of original size [2021-02-24 04:48:06,194 WARN L147 QuantifierPusher]: treesize reduction 13, result has 83.5 percent of original size 66 [2021-02-24 04:48:06,195 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:48:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:06,232 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:06,291 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:06,340 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:48:06,340 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:48:06,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:48:06,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:48:06 BoogieIcfgContainer [2021-02-24 04:48:06,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:48:06,371 INFO L168 Benchmark]: Toolchain (without parser) took 3544.25 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 134.1 MB in the beginning and 93.5 MB in the end (delta: 40.5 MB). Peak memory consumption was 73.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:06,371 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 157.3 MB. Free memory is still 137.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:48:06,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.58 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 123.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:06,377 INFO L168 Benchmark]: Boogie Preprocessor took 49.06 ms. Allocated memory is still 157.3 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:06,378 INFO L168 Benchmark]: RCFGBuilder took 583.14 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 140.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:06,382 INFO L168 Benchmark]: TraceAbstraction took 2622.37 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 139.8 MB in the beginning and 93.5 MB in the end (delta: 46.2 MB). Peak memory consumption was 77.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:06,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 157.3 MB. Free memory is still 137.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.58 ms. Allocated memory is still 157.3 MB. Free memory was 133.0 MB in the beginning and 123.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.06 ms. Allocated memory is still 157.3 MB. Free memory was 123.0 MB in the beginning and 121.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 583.14 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 140.5 MB in the end (delta: -19.0 MB). Peak memory consumption was 22.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2622.37 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 139.8 MB in the beginning and 93.5 MB in the end (delta: 46.2 MB). Peak memory consumption was 77.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int p; [L27] int i; [L28] int leader_len; [L29] int bufsize; [L30] int bufsize_0; [L31] int ielen; [L32] leader_len = __VERIFIER_nondet_int() [L33] bufsize = __VERIFIER_nondet_int() [L34] ielen = __VERIFIER_nondet_int() [L35] COND FALSE !(!(leader_len < 1000000)) [L36] COND FALSE !(!(bufsize < 1000000)) [L37] COND FALSE !(!(ielen < 1000000)) [L38] COND TRUE leader_len >0 [L39] COND TRUE bufsize >0 [L40] COND TRUE ielen >0 [L41] COND FALSE !(bufsize < leader_len) [L43] p = 0 [L44] bufsize_0 = bufsize [L45] bufsize -= leader_len [L46] p += leader_len [L47] COND FALSE !(bufsize < 2*ielen) [L49] i = 0 [L49] COND TRUE i < ielen && bufsize > 2 [L50] CALL __VERIFIER_assert(0<=p) [L18] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(0<=p) [L51] CALL __VERIFIER_assert(p+1 2 [L50] CALL __VERIFIER_assert(0<=p) [L18] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(0<=p) [L51] CALL __VERIFIER_assert(p+1