/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/ldv-regression/test20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:22:42,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:22:42,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:22:42,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:22:42,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:22:42,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:22:42,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:22:42,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:22:42,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:22:42,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:22:42,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:22:42,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:22:42,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:22:42,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:22:42,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:22:42,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:22:42,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:22:42,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:22:42,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:22:42,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:22:42,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:22:42,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:22:42,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:22:42,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:22:42,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-24 04:22:42,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-24 04:22:42,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-24 04:22:42,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-24 04:22:42,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-24 04:22:42,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-24 04:22:42,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-24 04:22:42,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-24 04:22:42,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-24 04:22:42,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-24 04:22:42,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-24 04:22:42,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-24 04:22:42,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-24 04:22:42,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-24 04:22:42,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:22:42,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:22:42,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:22:42,826 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 04:22:42,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:22:42,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:22:42,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:22:42,858 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:22:42,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:22:42,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:22:42,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:22:42,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:22:42,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:22:42,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:22:42,860 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:22:42,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:22:42,861 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:22:42,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:22:42,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:22:42,862 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:22:42,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:22:42,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:22:42,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:22:42,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:22:42,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:22:42,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:22:42,863 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:22:42,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:22:43,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:22:43,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:22:43,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:22:43,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:22:43,263 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:22:43,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test20.c [2021-02-24 04:22:43,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2391a93d1/4a5258967d3f465faa441d6f6f15a763/FLAGcc30218d8 [2021-02-24 04:22:43,897 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:22:43,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test20.c [2021-02-24 04:22:43,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2391a93d1/4a5258967d3f465faa441d6f6f15a763/FLAGcc30218d8 [2021-02-24 04:22:44,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2391a93d1/4a5258967d3f465faa441d6f6f15a763 [2021-02-24 04:22:44,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:22:44,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:22:44,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:22:44,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:22:44,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:22:44,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229e8eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44, skipping insertion in model container [2021-02-24 04:22:44,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:22:44,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:22:44,482 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test20.c[377,390] [2021-02-24 04:22:44,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:22:44,500 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:22:44,514 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test20.c[377,390] [2021-02-24 04:22:44,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:22:44,529 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:22:44,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44 WrapperNode [2021-02-24 04:22:44,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:22:44,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:22:44,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:22:44,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:22:44,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (1/1) ... [2021-02-24 04:22:44,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:22:44,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:22:44,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:22:44,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:22:44,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (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 04:22:44,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:22:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:22:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:22:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure equal [2021-02-24 04:22:44,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:22:44,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:22:44,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:22:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:22:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:22:44,661 INFO L130 BoogieDeclarations]: Found specification of procedure equal [2021-02-24 04:22:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:22:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:22:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:22:44,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:22:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:22:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:22:44,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:22:45,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:22:45,003 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:22:45,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:22:45 BoogieIcfgContainer [2021-02-24 04:22:45,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:22:45,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:22:45,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:22:45,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:22:45,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:22:44" (1/3) ... [2021-02-24 04:22:45,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b13effc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:22:45, skipping insertion in model container [2021-02-24 04:22:45,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:44" (2/3) ... [2021-02-24 04:22:45,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b13effc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:22:45, skipping insertion in model container [2021-02-24 04:22:45,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:22:45" (3/3) ... [2021-02-24 04:22:45,040 INFO L111 eAbstractionObserver]: Analyzing ICFG test20.c [2021-02-24 04:22:45,053 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:22:45,069 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:22:45,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:22:45,165 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:22:45,166 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:22:45,166 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:22:45,166 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:22:45,166 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:22:45,166 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:22:45,166 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:22:45,166 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:22:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2021-02-24 04:22:45,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-24 04:22:45,189 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:22:45,190 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] [2021-02-24 04:22:45,191 INFO L428 AbstractCegarLoop]: === Iteration 1 === [equalErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:22:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:22:45,199 INFO L82 PathProgramCache]: Analyzing trace with hash -703529037, now seen corresponding path program 1 times [2021-02-24 04:22:45,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:22:45,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370277180] [2021-02-24 04:22:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:22:45,292 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:22:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:45,453 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,454 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:45,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:45,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:45,507 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:45,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:45,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:22:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:45,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:45,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:22:45,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:45,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:22:45,708 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 04:22:45,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370277180] [2021-02-24 04:22:45,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:22:45,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:22:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417433959] [2021-02-24 04:22:45,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:22:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:22:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:22:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:22:45,735 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 8 states. [2021-02-24 04:22:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:22:46,091 INFO L93 Difference]: Finished difference Result 37 states and 36 transitions. [2021-02-24 04:22:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:22:46,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-02-24 04:22:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:22:46,102 INFO L225 Difference]: With dead ends: 37 [2021-02-24 04:22:46,103 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 04:22:46,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-02-24 04:22:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 04:22:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 04:22:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 04:22:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 04:22:46,138 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-02-24 04:22:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:22:46,138 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 04:22:46,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:22:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 04:22:46,139 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 04:22:46,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:22:46,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 04:22:46,587 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-24 04:22:46,588 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-24 04:22:46,588 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-24 04:22:46,588 INFO L185 CegarLoopUtils]: At program point equalEXIT(lines 6 14) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (not (= (select |#valid| |~#a~0.base|) 1)) (and (not (= equal_~a.base |equal_#in~b.base|)) (not (= equal_~a.base equal_~b.base))) (= |~#b~0.base| |~#a~0.base|)) [2021-02-24 04:22:46,589 INFO L185 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (= |~#a~0.base| |~#b~0.base|) (not (= (select |#valid| |~#a~0.base|) 1))) [2021-02-24 04:22:46,589 INFO L192 CegarLoopUtils]: At program point equalENTRY(lines 6 14) the Hoare annotation is: true [2021-02-24 04:22:46,589 INFO L185 CegarLoopUtils]: At program point equalFINAL(lines 6 14) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (not (= (select |#valid| |~#a~0.base|) 1)) (and (not (= equal_~a.base |equal_#in~b.base|)) (not (= equal_~a.base equal_~b.base))) (= |~#b~0.base| |~#a~0.base|)) [2021-02-24 04:22:46,589 INFO L185 CegarLoopUtils]: At program point L8(lines 6 14) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (= |~#a~0.base| |~#b~0.base|) (not (= (select |#valid| |~#a~0.base|) 1))) [2021-02-24 04:22:46,590 INFO L185 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (not (= (select |#valid| |~#a~0.base|) 1)) (and (not (= equal_~a.base |equal_#in~b.base|)) (not (= equal_~a.base equal_~b.base))) (= |~#b~0.base| |~#a~0.base|)) [2021-02-24 04:22:46,590 INFO L185 CegarLoopUtils]: At program point L6(lines 6 14) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (not (= equal_~a.base |equal_#in~b.base|)) (not (= (select |#valid| |~#a~0.base|) 1)) (= |~#b~0.base| |~#a~0.base|)) [2021-02-24 04:22:46,590 INFO L185 CegarLoopUtils]: At program point equalErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (or (= |equal_#in~a.base| |equal_#in~b.base|) (= |~#a~0.base| |~#b~0.base|) (not (= (select |#valid| |~#a~0.base|) 1))) [2021-02-24 04:22:46,591 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-24 04:22:46,591 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-24 04:22:46,591 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 04:22:46,591 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-24 04:22:46,591 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 04:22:46,591 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-24 04:22:46,592 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 16) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2021-02-24 04:22:46,592 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (= (select |#valid| |~#a~0.base|) 1) [2021-02-24 04:22:46,592 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (= (select |#valid| |~#a~0.base|) 1) [2021-02-24 04:22:46,592 INFO L185 CegarLoopUtils]: At program point L16-2(line 16) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2021-02-24 04:22:46,593 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2021-02-24 04:22:46,593 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-24 04:22:46,593 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-24 04:22:46,594 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2021-02-24 04:22:46,594 INFO L185 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2021-02-24 04:22:46,594 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2021-02-24 04:22:46,594 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 04:22:46,594 INFO L185 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: (and (= (select |#valid| |~#a~0.base|) 1) (not (= |~#b~0.base| |~#a~0.base|))) [2021-02-24 04:22:46,595 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 18 21) the Hoare annotation is: true [2021-02-24 04:22:46,595 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 18 21) the Hoare annotation is: true [2021-02-24 04:22:46,595 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 18 21) the Hoare annotation is: true [2021-02-24 04:22:46,595 INFO L192 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: true [2021-02-24 04:22:46,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:22:46 BoogieIcfgContainer [2021-02-24 04:22:46,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:22:46,616 INFO L168 Benchmark]: Toolchain (without parser) took 2349.00 ms. Allocated memory is still 156.2 MB. Free memory was 133.0 MB in the beginning and 58.3 MB in the end (delta: 74.6 MB). Peak memory consumption was 74.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:46,617 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:22:46,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.64 ms. Allocated memory is still 156.2 MB. Free memory was 131.9 MB in the beginning and 122.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:46,619 INFO L168 Benchmark]: Boogie Preprocessor took 32.06 ms. Allocated memory is still 156.2 MB. Free memory was 122.8 MB in the beginning and 121.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:46,620 INFO L168 Benchmark]: RCFGBuilder took 443.62 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 107.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:46,621 INFO L168 Benchmark]: TraceAbstraction took 1605.77 ms. Allocated memory is still 156.2 MB. Free memory was 107.2 MB in the beginning and 58.3 MB in the end (delta: 48.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:46,625 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 130.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.64 ms. Allocated memory is still 156.2 MB. Free memory was 131.9 MB in the beginning and 122.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.06 ms. Allocated memory is still 156.2 MB. Free memory was 122.8 MB in the beginning and 121.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 443.62 ms. Allocated memory is still 156.2 MB. Free memory was 121.3 MB in the beginning and 107.6 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1605.77 ms. Allocated memory is still 156.2 MB. Free memory was 107.2 MB in the beginning and 58.3 MB in the end (delta: 48.8 MB). Peak memory consumption was 49.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: (a == b || a == b) || !(\valid[a] == 1) - ProcedureContractResult [Line: 6]: Procedure Contract for equal Derived contract for procedure equal: ((a == b || !(\valid[a] == 1)) || (!(a == b) && !(a == b))) || b == a - ProcedureContractResult [Line: 18]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 31 SDslu, 60 SDs, 0 SdLazy, 50 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 30 PreInvPairs, 37 NumberOfFragments, 249 HoareAnnotationTreeSize, 30 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 30 FomulaSimplificationsInter, 533 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...