/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-fpi/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:02:35,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:02:35,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:02:35,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:02:35,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:02:35,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:02:35,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:02:35,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:02:35,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:02:35,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:02:35,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:02:35,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:02:35,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:02:35,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:02:35,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:02:35,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:02:35,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:02:35,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:02:35,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:02:35,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:02:35,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:02:35,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:02:35,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:02:35,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:02:35,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:02:35,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:02:35,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:02:35,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:02:35,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:02:35,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:02:35,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:02:35,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:02:35,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:02:35,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:02:35,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:02:35,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:02:35,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:02:35,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:02:35,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:02:35,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:02:35,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:02:35,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:02:35,605 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:02:35,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:02:35,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:02:35,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:02:35,606 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:02:35,606 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:02:35,606 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:02:35,606 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:02:35,606 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:02:35,607 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:02:35,607 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:02:35,607 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:02:35,607 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:02:35,607 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:02:35,607 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:02:35,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:02:35,608 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:02:35,608 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:02:35,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:02:35,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:02:35,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:02:35,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:02:35,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:02:35,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:02:35,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:02:35,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:02:35,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:02:35,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:02:35,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:02:35,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:02:35,817 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:02:35,817 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:02:35,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res2of.c [2023-03-31 21:02:36,809 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:02:36,968 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:02:36,969 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c [2023-03-31 21:02:36,973 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9eef4eeb/ea868593d6a04a858090839243d1ede4/FLAG49f301251 [2023-03-31 21:02:36,989 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9eef4eeb/ea868593d6a04a858090839243d1ede4 [2023-03-31 21:02:36,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:02:36,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:02:36,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:02:36,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:02:36,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:02:36,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:02:36" (1/1) ... [2023-03-31 21:02:36,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21637da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:36, skipping insertion in model container [2023-03-31 21:02:36,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:02:36" (1/1) ... [2023-03-31 21:02:37,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:02:37,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:02:37,122 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c[589,602] [2023-03-31 21:02:37,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:02:37,145 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:02:37,153 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res2of.c[589,602] [2023-03-31 21:02:37,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:02:37,169 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:02:37,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37 WrapperNode [2023-03-31 21:02:37,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:02:37,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:02:37,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:02:37,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:02:37,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:02:37,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:02:37,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:02:37,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:02:37,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (1/1) ... [2023-03-31 21:02:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:02:37,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:02:37,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:02:37,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:02:37,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:02:37,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:02:37,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:02:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 21:02:37,286 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:02:37,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:02:37,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 21:02:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 21:02:37,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:02:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:02:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:02:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:02:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:02:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:02:37,396 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:02:37,397 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:02:37,658 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:02:37,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:02:37,701 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-03-31 21:02:37,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:02:37 BoogieIcfgContainer [2023-03-31 21:02:37,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:02:37,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:02:37,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:02:37,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:02:37,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:02:36" (1/3) ... [2023-03-31 21:02:37,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347adc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:02:37, skipping insertion in model container [2023-03-31 21:02:37,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:37" (2/3) ... [2023-03-31 21:02:37,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347adc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:02:37, skipping insertion in model container [2023-03-31 21:02:37,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:02:37" (3/3) ... [2023-03-31 21:02:37,708 INFO L112 eAbstractionObserver]: Analyzing ICFG res2of.c [2023-03-31 21:02:37,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:02:37,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:02:37,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:02:37,774 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5dbac4bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:02:37,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:02:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 21:02:37,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 21:02:37,782 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:02:37,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:02:37,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:02:37,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:02:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1698240331, now seen corresponding path program 1 times [2023-03-31 21:02:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:02:37,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822193177] [2023-03-31 21:02:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:02:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:02:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:02:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:02:38,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:02:38,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822193177] [2023-03-31 21:02:38,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822193177] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:02:38,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:02:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 21:02:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957177325] [2023-03-31 21:02:38,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:02:38,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:02:38,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:02:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:02:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:02:38,142 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:02:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:02:38,243 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-03-31 21:02:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:02:38,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-03-31 21:02:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:02:38,250 INFO L225 Difference]: With dead ends: 55 [2023-03-31 21:02:38,250 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 21:02:38,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:02:38,254 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:02:38,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 42 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:02:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 21:02:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 21:02:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:02:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-03-31 21:02:38,280 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2023-03-31 21:02:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:02:38,281 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-03-31 21:02:38,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:02:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-03-31 21:02:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 21:02:38,281 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:02:38,282 INFO L195 NwaCegarLoop]: 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] [2023-03-31 21:02:38,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:02:38,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:02:38,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:02:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1845636993, now seen corresponding path program 1 times [2023-03-31 21:02:38,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:02:38,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095289649] [2023-03-31 21:02:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:02:38,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:02:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 21:02:38,388 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 21:02:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 21:02:38,471 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 21:02:38,471 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 21:02:38,472 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 21:02:38,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:02:38,476 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-03-31 21:02:38,479 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 21:02:38,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 09:02:38 BoogieIcfgContainer [2023-03-31 21:02:38,523 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 21:02:38,524 INFO L158 Benchmark]: Toolchain (without parser) took 1531.21ms. Allocated memory was 242.2MB in the beginning and 291.5MB in the end (delta: 49.3MB). Free memory was 174.7MB in the beginning and 202.0MB in the end (delta: -27.3MB). Peak memory consumption was 22.8MB. Max. memory is 8.0GB. [2023-03-31 21:02:38,524 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 242.2MB. Free memory was 188.4MB in the beginning and 188.3MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 21:02:38,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.15ms. Allocated memory is still 242.2MB. Free memory was 174.5MB in the beginning and 163.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 21:02:38,525 INFO L158 Benchmark]: Boogie Preprocessor took 25.20ms. Allocated memory is still 242.2MB. Free memory was 163.7MB in the beginning and 161.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 21:02:38,525 INFO L158 Benchmark]: RCFGBuilder took 506.78ms. Allocated memory was 242.2MB in the beginning and 291.5MB in the end (delta: 49.3MB). Free memory was 161.9MB in the beginning and 249.2MB in the end (delta: -87.3MB). Peak memory consumption was 18.6MB. Max. memory is 8.0GB. [2023-03-31 21:02:38,525 INFO L158 Benchmark]: TraceAbstraction took 818.69ms. Allocated memory is still 291.5MB. Free memory was 248.7MB in the beginning and 202.0MB in the end (delta: 46.7MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. [2023-03-31 21:02:38,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 242.2MB. Free memory was 188.4MB in the beginning and 188.3MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.15ms. Allocated memory is still 242.2MB. Free memory was 174.5MB in the beginning and 163.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.20ms. Allocated memory is still 242.2MB. Free memory was 163.7MB in the beginning and 161.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 506.78ms. Allocated memory was 242.2MB in the beginning and 291.5MB in the end (delta: 49.3MB). Free memory was 161.9MB in the beginning and 249.2MB in the end (delta: -87.3MB). Peak memory consumption was 18.6MB. Max. memory is 8.0GB. * TraceAbstraction took 818.69ms. Allocated memory is still 291.5MB. Free memory was 248.7MB in the beginning and 202.0MB in the end (delta: 46.7MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) VAL [N=1, \old(N)=0] [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=1, \old(N)=0, \old(cond)=1] [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [N=1, \old(N)=0] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L30] int *b = malloc(sizeof(int)*N); [L31] int *c = malloc(sizeof(int)*N); [L33] sum[0] = 0 [L34] i=0 VAL [N=1, \old(N)=0, a={-2:0}, b={-3:0}, c={-1:0}, i=0, sum={5:0}] [L34] COND TRUE i