/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-b7b32d2 [2021-02-22 02:21:55,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:55,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:55,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:21:55,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:55,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:55,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:55,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:55,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:55,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:55,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:55,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:55,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:55,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:55,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:55,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:55,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:55,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:55,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:55,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:55,141 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 02:21:55,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:55,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:55,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:55,157 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:55,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:55,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:55,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:55,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:55,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:55,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:55,159 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:55,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:55,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:55,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:55,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:55,161 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:55,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:55,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:55,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:55,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:55,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:55,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:55,163 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:55,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:55,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:55,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:55,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:55,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:55,592 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:55,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2021-02-22 02:21:55,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d37a268/c7cb56438fa64694b891cd79ebf90a69/FLAGfac093063 [2021-02-22 02:21:56,356 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:56,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2021-02-22 02:21:56,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d37a268/c7cb56438fa64694b891cd79ebf90a69/FLAGfac093063 [2021-02-22 02:21:56,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32d37a268/c7cb56438fa64694b891cd79ebf90a69 [2021-02-22 02:21:56,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:56,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:56,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:56,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:56,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:56,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb13921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:56, skipping insertion in model container [2021-02-22 02:21:56,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:56" (1/1) ... [2021-02-22 02:21:56,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:56,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:57,010 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] [2021-02-22 02:21:57,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:57,043 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:57,064 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] [2021-02-22 02:21:57,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:57,119 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:57,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57 WrapperNode [2021-02-22 02:21:57,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:57,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:57,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:57,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:57,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (1/1) ... [2021-02-22 02:21:57,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:57,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:57,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:57,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:57,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (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 02:21:57,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:21:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:57,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-22 02:21:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-22 02:21:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:21:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:21:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:57,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:57,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:57,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:57,803 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:57,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:57 BoogieIcfgContainer [2021-02-22 02:21:57,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:57,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:57,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:57,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:57,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:56" (1/3) ... [2021-02-22 02:21:57,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef6c64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:57, skipping insertion in model container [2021-02-22 02:21:57,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:57" (2/3) ... [2021-02-22 02:21:57,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef6c64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:57, skipping insertion in model container [2021-02-22 02:21:57,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:57" (3/3) ... [2021-02-22 02:21:57,815 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2021-02-22 02:21:57,822 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:57,827 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:57,851 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:57,877 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:57,878 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:57,878 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:57,878 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:57,878 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:57,878 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:57,878 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:57,879 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2021-02-22 02:21:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 02:21:57,934 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:57,936 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] [2021-02-22 02:21:57,936 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1838769705, now seen corresponding path program 1 times [2021-02-22 02:21:57,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:57,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550392028] [2021-02-22 02:21:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:58,069 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:58,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:58,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:58,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:58,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:58,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,346 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:58,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,368 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:58,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:58,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:58,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:58,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:58,451 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 02:21:58,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550392028] [2021-02-22 02:21:58,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:58,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:21:58,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077227845] [2021-02-22 02:21:58,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:21:58,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:21:58,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:21:58,480 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 8 states. [2021-02-22 02:21:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:59,186 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-02-22 02:21:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-22 02:21:59,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2021-02-22 02:21:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:59,197 INFO L225 Difference]: With dead ends: 85 [2021-02-22 02:21:59,198 INFO L226 Difference]: Without dead ends: 56 [2021-02-22 02:21:59,202 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 [2021-02-22 02:21:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-22 02:21:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-02-22 02:21:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-22 02:21:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-02-22 02:21:59,257 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 44 [2021-02-22 02:21:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:59,258 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-02-22 02:21:59,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:21:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-02-22 02:21:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-22 02:21:59,260 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:59,260 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] [2021-02-22 02:21:59,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:59,261 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:59,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash -855808377, now seen corresponding path program 1 times [2021-02-22 02:21:59,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:59,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297533866] [2021-02-22 02:21:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:59,281 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:59,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:59,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:21:59,359 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 02:21:59,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,371 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 02:21:59,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:59,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:59,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:59,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:59,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:59,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:59,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:59,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-02-22 02:21:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:59,555 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:59,558 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:59,571 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 02:21:59,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297533866] [2021-02-22 02:21:59,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:59,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 02:21:59,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969386846] [2021-02-22 02:21:59,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 02:21:59,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 02:21:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-22 02:21:59,575 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 10 states. [2021-02-22 02:22:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:22:00,101 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-02-22 02:22:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-22 02:22:00,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2021-02-22 02:22:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:22:00,105 INFO L225 Difference]: With dead ends: 66 [2021-02-22 02:22:00,105 INFO L226 Difference]: Without dead ends: 64 [2021-02-22 02:22:00,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-22 02:22:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-22 02:22:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-22 02:22:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-22 02:22:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-02-22 02:22:00,128 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 49 [2021-02-22 02:22:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:22:00,129 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-02-22 02:22:00,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 02:22:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-02-22 02:22:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-22 02:22:00,132 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:22:00,132 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] [2021-02-22 02:22:00,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:22:00,133 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:22:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:22:00,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1519335324, now seen corresponding path program 1 times [2021-02-22 02:22:00,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:22:00,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673831583] [2021-02-22 02:22:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:22:00,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:00,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:00,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:00,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-22 02:22:00,209 WARN L141 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size [2021-02-22 02:22:00,223 INFO L723 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2021-02-22 02:22:00,229 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:00,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:22:00,234 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:22:00,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-02-22 02:22:00,250 WARN L147 QuantifierPusher]: treesize reduction 5, result has 86.5 percent of original size 32 [2021-02-22 02:22:00,257 WARN L141 QuantifierPusher]: treesize reduction 13, result has 83.5 percent of original size [2021-02-22 02:22:00,261 WARN L147 QuantifierPusher]: treesize reduction 13, result has 83.5 percent of original size 66 [2021-02-22 02:22:00,263 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-22 02:22:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:22:00,301 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:22:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:22:00,332 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:22:00,386 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:22:00,386 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:22:00,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:22:00,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:22:00 BoogieIcfgContainer [2021-02-22 02:22:00,411 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:22:00,414 INFO L168 Benchmark]: Toolchain (without parser) took 3672.88 ms. Allocated memory was 173.0 MB in the beginning and 233.8 MB in the end (delta: 60.8 MB). Free memory was 148.4 MB in the beginning and 108.2 MB in the end (delta: 40.2 MB). Peak memory consumption was 102.6 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:00,415 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 173.0 MB. Free memory is still 146.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:22:00,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.36 ms. Allocated memory is still 173.0 MB. Free memory was 147.2 MB in the beginning and 137.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:00,421 INFO L168 Benchmark]: Boogie Preprocessor took 66.55 ms. Allocated memory is still 173.0 MB. Free memory was 137.4 MB in the beginning and 135.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:00,422 INFO L168 Benchmark]: RCFGBuilder took 616.50 ms. Allocated memory is still 173.0 MB. Free memory was 135.9 MB in the beginning and 151.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:00,425 INFO L168 Benchmark]: TraceAbstraction took 2603.87 ms. Allocated memory was 173.0 MB in the beginning and 233.8 MB in the end (delta: 60.8 MB). Free memory was 151.0 MB in the beginning and 108.2 MB in the end (delta: 42.8 MB). Peak memory consumption was 104.7 MB. Max. memory is 8.0 GB. [2021-02-22 02:22:00,434 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 173.0 MB. Free memory is still 146.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 361.36 ms. Allocated memory is still 173.0 MB. Free memory was 147.2 MB in the beginning and 137.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.55 ms. Allocated memory is still 173.0 MB. Free memory was 137.4 MB in the beginning and 135.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 616.50 ms. Allocated memory is still 173.0 MB. Free memory was 135.9 MB in the beginning and 151.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 18.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2603.87 ms. Allocated memory was 173.0 MB in the beginning and 233.8 MB in the end (delta: 60.8 MB). Free memory was 151.0 MB in the beginning and 108.2 MB in the end (delta: 42.8 MB). Peak memory consumption was 104.7 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