/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/diff_usafe.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 18:56:29,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 18:56:29,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 18:56:29,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 18:56:29,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 18:56:29,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 18:56:29,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 18:56:29,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 18:56:29,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 18:56:29,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 18:56:29,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 18:56:29,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 18:56:29,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 18:56:29,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 18:56:29,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 18:56:29,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 18:56:29,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 18:56:29,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 18:56:29,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 18:56:29,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 18:56:29,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 18:56:29,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 18:56:29,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 18:56:29,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 18:56:29,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 18:56:29,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 18:56:29,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 18:56:29,406 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 18:56:29,407 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 18:56:29,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 18:56:29,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 18:56:29,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 18:56:29,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 18:56:29,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 18:56:29,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 18:56:29,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 18:56:29,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 18:56:29,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 18:56:29,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 18:56:29,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 18:56:29,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 18:56:29,473 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 18:56:29,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 18:56:29,473 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 18:56:29,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 18:56:29,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 18:56:29,474 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 18:56:29,475 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 18:56:29,475 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 18:56:29,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 18:56:29,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 18:56:29,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 18:56:29,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 18:56:29,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 18:56:29,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 18:56:29,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 18:56:29,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 18:56:29,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 18:56:29,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 18:56:29,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 18:56:29,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 18:56:29,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 18:56:29,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 18:56:29,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 18:56:29,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 18:56:29,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 18:56:29,913 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 18:56:29,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/diff_usafe.c [2020-12-22 18:56:30,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de52bba9b/8272c48c35a94bdfb98b589bfba9118f/FLAGf1afe334e [2020-12-22 18:56:30,682 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 18:56:30,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/diff_usafe.c [2020-12-22 18:56:30,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de52bba9b/8272c48c35a94bdfb98b589bfba9118f/FLAGf1afe334e [2020-12-22 18:56:31,075 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de52bba9b/8272c48c35a94bdfb98b589bfba9118f [2020-12-22 18:56:31,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 18:56:31,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 18:56:31,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:31,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 18:56:31,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 18:56:31,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f079c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31, skipping insertion in model container [2020-12-22 18:56:31,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 18:56:31,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 18:56:31,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:31,372 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 18:56:31,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 18:56:31,422 INFO L208 MainTranslator]: Completed translation [2020-12-22 18:56:31,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31 WrapperNode [2020-12-22 18:56:31,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 18:56:31,424 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:31,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 18:56:31,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 18:56:31,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 18:56:31,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 18:56:31,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 18:56:31,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 18:56:31,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (1/1) ... [2020-12-22 18:56:31,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 18:56:31,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 18:56:31,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 18:56:31,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 18:56:31,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (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 [2020-12-22 18:56:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 18:56:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 18:56:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 18:56:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 18:56:31,956 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 18:56:31,956 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 18:56:31,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:31 BoogieIcfgContainer [2020-12-22 18:56:31,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 18:56:31,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 18:56:31,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 18:56:31,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 18:56:31,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:56:31" (1/3) ... [2020-12-22 18:56:31,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53331f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:31, skipping insertion in model container [2020-12-22 18:56:31,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:56:31" (2/3) ... [2020-12-22 18:56:31,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53331f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:56:31, skipping insertion in model container [2020-12-22 18:56:31,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:31" (3/3) ... [2020-12-22 18:56:31,972 INFO L111 eAbstractionObserver]: Analyzing ICFG diff_usafe.c [2020-12-22 18:56:31,980 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 18:56:31,987 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-22 18:56:32,017 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-22 18:56:32,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 18:56:32,051 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 18:56:32,051 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 18:56:32,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 18:56:32,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 18:56:32,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 18:56:32,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 18:56:32,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 18:56:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-22 18:56:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 18:56:32,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 18:56:32,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash 28739442, now seen corresponding path program 1 times [2020-12-22 18:56:32,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:32,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159936302] [2020-12-22 18:56:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:32,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159936302] [2020-12-22 18:56:32,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:32,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:32,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566934093] [2020-12-22 18:56:32,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 18:56:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 18:56:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 18:56:32,373 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-22 18:56:32,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:32,388 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 18:56:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 18:56:32,390 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-22 18:56:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:32,399 INFO L225 Difference]: With dead ends: 25 [2020-12-22 18:56:32,400 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 18:56:32,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 18:56:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 18:56:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 18:56:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 18:56:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-22 18:56:32,440 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2020-12-22 18:56:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:32,440 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-22 18:56:32,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 18:56:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-22 18:56:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 18:56:32,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 18:56:32,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 18:56:32,442 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 28699080, now seen corresponding path program 1 times [2020-12-22 18:56:32,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:32,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694452564] [2020-12-22 18:56:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 18:56:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 18:56:32,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694452564] [2020-12-22 18:56:32,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 18:56:32,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 18:56:32,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390737820] [2020-12-22 18:56:32,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 18:56:32,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 18:56:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 18:56:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:32,525 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-12-22 18:56:32,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 18:56:32,576 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-22 18:56:32,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 18:56:32,577 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 18:56:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 18:56:32,578 INFO L225 Difference]: With dead ends: 22 [2020-12-22 18:56:32,579 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 18:56:32,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 18:56:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 18:56:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 18:56:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 18:56:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 18:56:32,586 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 5 [2020-12-22 18:56:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 18:56:32,586 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 18:56:32,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 18:56:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 18:56:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 18:56:32,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 18:56:32,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 18:56:32,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 18:56:32,589 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 18:56:32,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 18:56:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash 28699946, now seen corresponding path program 1 times [2020-12-22 18:56:32,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 18:56:32,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445040219] [2020-12-22 18:56:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 18:56:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 18:56:32,641 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 18:56:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 18:56:32,657 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 18:56:32,680 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 18:56:32,680 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 18:56:32,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 18:56:32,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:56:32 BoogieIcfgContainer [2020-12-22 18:56:32,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 18:56:32,707 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 18:56:32,707 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 18:56:32,708 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 18:56:32,708 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:56:31" (3/4) ... [2020-12-22 18:56:32,711 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 18:56:32,779 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/diff_usafe.c-witness.graphml [2020-12-22 18:56:32,779 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 18:56:32,782 INFO L168 Benchmark]: Toolchain (without parser) took 1699.20 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 103.9 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,783 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 18:56:32,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.29 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 116.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,786 INFO L168 Benchmark]: Boogie Preprocessor took 30.39 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,787 INFO L168 Benchmark]: RCFGBuilder took 464.15 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 131.7 MB in the end (delta: -18.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,790 INFO L168 Benchmark]: TraceAbstraction took 743.07 ms. Allocated memory is still 151.0 MB. Free memory was 131.2 MB in the beginning and 106.0 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,795 INFO L168 Benchmark]: Witness Printer took 72.20 ms. Allocated memory is still 151.0 MB. Free memory was 106.0 MB in the beginning and 103.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 18:56:32,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 336.29 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 116.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.39 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.15 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 131.7 MB in the end (delta: -18.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 743.07 ms. Allocated memory is still 151.0 MB. Free memory was 131.2 MB in the beginning and 106.0 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 8.0 GB. * Witness Printer took 72.20 ms. Allocated memory is still 151.0 MB. Free memory was 106.0 MB in the beginning and 103.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L30] int *A; [L31] int Alen = __VERIFIER_nondet_int(); [L32] int *B; [L33] int Blen = __VERIFIER_nondet_int(); [L34] int *D; [L5] int k = 0; [L6] int i = 0; [L7] int l1 = Alen; [L8] int l2 = Blen; [L9] int found; [L11] COND TRUE i < l1 [L12] int j = 0; [L13] found = 0 [L14] COND TRUE j < l2 && !found [L15] A[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 21 SDslu, 0 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 incorrect! Received shutdown request...