/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 17:22:19,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:22:19,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:22:19,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:22:19,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:22:19,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:22:19,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:22:19,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:22:19,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:22:19,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:22:19,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:22:19,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:22:19,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:22:19,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:22:19,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:22:19,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:22:19,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:22:19,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:22:19,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:22:19,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:22:19,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:22:19,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:22:19,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:22:19,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:22:19,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 17:22:19,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 17:22:19,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 17:22:19,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 17:22:19,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 17:22:19,766 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 17:22:19,766 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 17:22:19,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 17:22:19,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 17:22:19,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 17:22:19,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 17:22:19,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 17:22:19,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 17:22:19,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 17:22:19,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:22:19,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:22:19,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:22:19,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 17:22:19,803 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:22:19,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:22:19,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:22:19,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:22:19,805 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:22:19,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:22:19,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:22:19,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:22:19,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:22:19,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:22:19,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:22:19,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:22:19,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:22:19,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:22:19,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:22:19,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:22:19,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:22:19,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:22:19,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:22:19,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:22:19,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:22:19,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:22:19,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:22:19,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:22:19,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:22:19,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:22:19,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:22:19,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 17:22:19,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:22:20,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:22:20,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:22:20,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:22:20,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 17:22:20,193 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 17:22:20,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c [2021-02-19 17:22:20,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc1bcc9c/db86d3a0e05e434eb4a6d71b4b5bdcc1/FLAGa02b67100 [2021-02-19 17:22:20,964 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 17:22:20,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c [2021-02-19 17:22:20,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc1bcc9c/db86d3a0e05e434eb4a6d71b4b5bdcc1/FLAGa02b67100 [2021-02-19 17:22:21,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecc1bcc9c/db86d3a0e05e434eb4a6d71b4b5bdcc1 [2021-02-19 17:22:21,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:22:21,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:22:21,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 17:22:21,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 17:22:21,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 17:22:21,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5fd79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21, skipping insertion in model container [2021-02-19 17:22:21,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 17:22:21,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 17:22:21,522 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[354,367] [2021-02-19 17:22:21,527 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[442,455] [2021-02-19 17:22:21,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:22:21,540 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 17:22:21,554 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[354,367] [2021-02-19 17:22:21,556 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-2.c[442,455] [2021-02-19 17:22:21,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 17:22:21,573 INFO L208 MainTranslator]: Completed translation [2021-02-19 17:22:21,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21 WrapperNode [2021-02-19 17:22:21,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 17:22:21,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:22:21,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:22:21,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:22:21,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (1/1) ... [2021-02-19 17:22:21,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:22:21,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:22:21,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:22:21,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:22:21,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (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 [2021-02-19 17:22:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 17:22:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:22:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 17:22:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-19 17:22:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2021-02-19 17:22:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 17:22:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 17:22:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 17:22:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 17:22:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 17:22:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-19 17:22:21,717 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2021-02-19 17:22:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 17:22:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 17:22:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 17:22:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:22:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 17:22:21,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 17:22:21,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 17:22:22,116 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:22:22,120 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:22:22,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:22:22 BoogieIcfgContainer [2021-02-19 17:22:22,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:22:22,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:22:22,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:22:22,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:22:22,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 05:22:21" (1/3) ... [2021-02-19 17:22:22,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2d8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:22:22, skipping insertion in model container [2021-02-19 17:22:22,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 05:22:21" (2/3) ... [2021-02-19 17:22:22,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2d8cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:22:22, skipping insertion in model container [2021-02-19 17:22:22,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:22:22" (3/3) ... [2021-02-19 17:22:22,145 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-2.c [2021-02-19 17:22:22,159 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:22:22,170 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-19 17:22:22,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-19 17:22:22,233 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:22:22,233 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:22:22,234 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:22:22,234 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:22:22,234 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:22:22,234 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:22:22,234 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:22:22,235 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:22:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-19 17:22:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 17:22:22,270 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 17:22:22,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:22:22,271 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 17:22:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:22:22,280 INFO L82 PathProgramCache]: Analyzing trace with hash -900640831, now seen corresponding path program 1 times [2021-02-19 17:22:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:22:22,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038728636] [2021-02-19 17:22:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:22:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:22,530 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:22,531 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:22:22,532 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:22,533 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 17:22:22,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:22,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 17:22:22,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:22,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:22:22,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 17:22:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:22,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:22,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:22:22,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-02-19 17:22:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:22:22,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:22:22,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 17:22:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:22:22,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038728636] [2021-02-19 17:22:22,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:22:22,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:22:22,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864030679] [2021-02-19 17:22:22,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:22:22,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:22:22,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:22:22,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:22:22,682 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2021-02-19 17:22:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:22:22,829 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-02-19 17:22:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:22:22,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-02-19 17:22:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:22:22,837 INFO L225 Difference]: With dead ends: 32 [2021-02-19 17:22:22,838 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 17:22:22,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:22:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 17:22:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 17:22:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 17:22:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 17:22:22,873 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-02-19 17:22:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:22:22,874 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 17:22:22,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 17:22:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 17:22:22,874 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 17:22:22,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:22:22,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 17:22:22,959 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 17:22:22,960 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 17:22:22,960 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 17:22:22,960 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:22:22,960 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 17:22:22,961 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:22:22,961 INFO L189 CegarLoopUtils]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-02-19 17:22:22,961 INFO L185 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (not (= |f_#in~n| 2)) [2021-02-19 17:22:22,961 INFO L189 CegarLoopUtils]: For program point L11-1(lines 8 13) no Hoare annotation was computed. [2021-02-19 17:22:22,962 INFO L189 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-02-19 17:22:22,962 INFO L189 CegarLoopUtils]: For program point fEXIT(lines 8 13) no Hoare annotation was computed. [2021-02-19 17:22:22,962 INFO L192 CegarLoopUtils]: At program point fENTRY(lines 8 13) the Hoare annotation is: true [2021-02-19 17:22:22,962 INFO L189 CegarLoopUtils]: For program point fFINAL(lines 8 13) no Hoare annotation was computed. [2021-02-19 17:22:22,962 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 17:22:22,962 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 17:22:22,962 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 17:22:22,963 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 17:22:22,963 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 22 24) the Hoare annotation is: true [2021-02-19 17:22:22,963 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 22 24) no Hoare annotation was computed. [2021-02-19 17:22:22,963 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 22 24) no Hoare annotation was computed. [2021-02-19 17:22:22,963 INFO L189 CegarLoopUtils]: For program point L18-1(lines 15 20) no Hoare annotation was computed. [2021-02-19 17:22:22,963 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-02-19 17:22:22,964 INFO L189 CegarLoopUtils]: For program point f2EXIT(lines 15 20) no Hoare annotation was computed. [2021-02-19 17:22:22,964 INFO L192 CegarLoopUtils]: At program point f2ENTRY(lines 15 20) the Hoare annotation is: true [2021-02-19 17:22:22,964 INFO L189 CegarLoopUtils]: For program point f2FINAL(lines 15 20) no Hoare annotation was computed. [2021-02-19 17:22:22,964 INFO L189 CegarLoopUtils]: For program point f2Err0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-02-19 17:22:22,964 INFO L192 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: true [2021-02-19 17:22:22,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:22:22 BoogieIcfgContainer [2021-02-19 17:22:22,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:22:22,972 INFO L168 Benchmark]: Toolchain (without parser) took 1630.93 ms. Allocated memory is still 173.0 MB. Free memory was 148.1 MB in the beginning and 114.2 MB in the end (delta: 34.0 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2021-02-19 17:22:22,973 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 173.0 MB. Free memory is still 144.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 17:22:22,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.05 ms. Allocated memory is still 173.0 MB. Free memory was 147.0 MB in the beginning and 137.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 17:22:22,975 INFO L168 Benchmark]: Boogie Preprocessor took 32.32 ms. Allocated memory is still 173.0 MB. Free memory was 137.9 MB in the beginning and 136.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 17:22:22,976 INFO L168 Benchmark]: RCFGBuilder took 518.07 ms. Allocated memory is still 173.0 MB. Free memory was 136.6 MB in the beginning and 124.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-19 17:22:22,977 INFO L168 Benchmark]: TraceAbstraction took 842.27 ms. Allocated memory is still 173.0 MB. Free memory was 123.4 MB in the beginning and 114.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2021-02-19 17:22:22,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 173.0 MB. Free memory is still 144.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.05 ms. Allocated memory is still 173.0 MB. Free memory was 147.0 MB in the beginning and 137.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.32 ms. Allocated memory is still 173.0 MB. Free memory was 137.9 MB in the beginning and 136.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 518.07 ms. Allocated memory is still 173.0 MB. Free memory was 136.6 MB in the beginning and 124.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 842.27 ms. Allocated memory is still 173.0 MB. Free memory was 123.4 MB in the beginning and 114.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.3 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 - PositiveResult [Line: 19]: 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 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 9 SDslu, 16 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 8 LocationsWithAnnotation, 10 PreInvPairs, 10 NumberOfFragments, 41 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 68 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 611 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...