/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/ldv-memsafety/memset.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:12:50,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:12:50,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:12:50,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:12:50,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:12:50,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:12:50,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:12:50,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:12:50,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:12:50,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:12:50,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:12:50,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:12:50,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:12:50,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:12:50,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:12:50,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:12:50,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:12:50,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:12:50,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:12:50,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:12:50,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:12:50,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:12:50,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:12:50,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:12:50,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 17:12:50,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 17:12:50,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 17:12:50,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 17:12:50,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 17:12:50,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 17:12:50,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:12:50,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:12:50,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:12:50,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:12:50,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:12:50,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:12:50,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:12:50,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:12:50,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:12:50,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:12:50,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:12:50,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 17:12:51,010 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:12:51,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:12:51,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:12:51,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:12:51,016 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:12:51,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:12:51,016 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:12:51,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:12:51,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:12:51,017 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:12:51,018 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:12:51,018 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:12:51,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:12:51,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:12:51,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:12:51,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:12:51,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:12:51,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:12:51,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:12:51,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:12:51,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:12:51,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:12:51,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:12:51,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:12:51,020 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:12:51,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:12:51,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:12:51,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:12:51,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:12:51,507 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:12:51,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memset.c [2020-12-23 17:12:51,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/beb4af3c7/cb8fe73373f84a07a8ca08d6add6fd17/FLAGe9f78152a [2020-12-23 17:12:52,265 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:12:52,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memset.c [2020-12-23 17:12:52,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/beb4af3c7/cb8fe73373f84a07a8ca08d6add6fd17/FLAGe9f78152a [2020-12-23 17:12:52,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/beb4af3c7/cb8fe73373f84a07a8ca08d6add6fd17 [2020-12-23 17:12:52,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:12:52,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:12:52,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:12:52,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:12:52,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:12:52,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f8e166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52, skipping insertion in model container [2020-12-23 17:12:52,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:12:52,632 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 17:12:52,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:12:52,782 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 17:12:52,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:12:52,813 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:12:52,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52 WrapperNode [2020-12-23 17:12:52,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:12:52,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:12:52,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:12:52,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:12:52,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:12:52,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:12:52,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:12:52,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:12:52,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... [2020-12-23 17:12:52,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:12:52,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:12:52,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:12:52,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:12:52,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 17:12:53,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:12:53,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:12:53,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:12:53,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 17:12:53,295 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:12:53,295 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 17:12:53,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:12:53 BoogieIcfgContainer [2020-12-23 17:12:53,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:12:53,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:12:53,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:12:53,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:12:53,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:12:52" (1/3) ... [2020-12-23 17:12:53,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307dfee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:12:53, skipping insertion in model container [2020-12-23 17:12:53,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:12:52" (2/3) ... [2020-12-23 17:12:53,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@307dfee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:12:53, skipping insertion in model container [2020-12-23 17:12:53,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:12:53" (3/3) ... [2020-12-23 17:12:53,315 INFO L111 eAbstractionObserver]: Analyzing ICFG memset.c [2020-12-23 17:12:53,322 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:12:53,328 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-23 17:12:53,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 17:12:53,389 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:12:53,389 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:12:53,389 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:12:53,390 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:12:53,390 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:12:53,390 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:12:53,390 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:12:53,390 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:12:53,412 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 17:12:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-23 17:12:53,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:53,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-23 17:12:53,422 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-23 17:12:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-12-23 17:12:53,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:53,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535456950] [2020-12-23 17:12:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:12:53,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535456950] [2020-12-23 17:12:53,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:12:53,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:12:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606599746] [2020-12-23 17:12:53,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:12:53,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:53,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:12:53,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:12:53,756 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 17:12:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:53,813 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-23 17:12:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:12:53,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-23 17:12:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:53,824 INFO L225 Difference]: With dead ends: 11 [2020-12-23 17:12:53,825 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 17:12:53,827 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 [2020-12-23 17:12:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 17:12:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 17:12:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 17:12:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 17:12:53,861 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2020-12-23 17:12:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:53,862 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 17:12:53,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:12:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 17:12:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-23 17:12:53,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:53,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-23 17:12:53,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:12:53,863 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-23 17:12:53,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-12-23 17:12:53,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:53,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999975509] [2020-12-23 17:12:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:12:53,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999975509] [2020-12-23 17:12:53,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:12:53,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:12:53,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758282047] [2020-12-23 17:12:53,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 17:12:53,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 17:12:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 17:12:53,938 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2020-12-23 17:12:53,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:53,957 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-12-23 17:12:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 17:12:53,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-23 17:12:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:53,958 INFO L225 Difference]: With dead ends: 8 [2020-12-23 17:12:53,959 INFO L226 Difference]: Without dead ends: 8 [2020-12-23 17:12:53,960 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 [2020-12-23 17:12:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-23 17:12:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-23 17:12:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-23 17:12:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-23 17:12:53,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2020-12-23 17:12:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:53,963 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-23 17:12:53,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 17:12:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-23 17:12:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:12:53,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:53,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:12:53,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:12:53,964 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-23 17:12:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2020-12-23 17:12:53,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:53,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259609010] [2020-12-23 17:12:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:12:54,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259609010] [2020-12-23 17:12:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:12:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 17:12:54,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055765210] [2020-12-23 17:12:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:12:54,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:54,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:12:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:12:54,026 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2020-12-23 17:12:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:54,049 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-23 17:12:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:12:54,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 17:12:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:54,051 INFO L225 Difference]: With dead ends: 9 [2020-12-23 17:12:54,051 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 17:12:54,052 INFO L677 BasicCegarLoop]: 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 [2020-12-23 17:12:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 17:12:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 17:12:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 17:12:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 17:12:54,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 17:12:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:54,056 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 17:12:54,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:12:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 17:12:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 17:12:54,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:54,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:12:54,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:12:54,058 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-23 17:12:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash 87920521, now seen corresponding path program 1 times [2020-12-23 17:12:54,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:54,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84856214] [2020-12-23 17:12:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:12:54,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84856214] [2020-12-23 17:12:54,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368538650] [2020-12-23 17:12:54,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 17:12:54,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:12:54,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 17:12:54,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-23 17:12:54,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132556563] [2020-12-23 17:12:54,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 17:12:54,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:54,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 17:12:54,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:12:54,417 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2020-12-23 17:12:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:54,439 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-12-23 17:12:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 17:12:54,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-23 17:12:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:54,440 INFO L225 Difference]: With dead ends: 10 [2020-12-23 17:12:54,441 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 17:12:54,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:12:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 17:12:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 17:12:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 17:12:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 17:12:54,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-23 17:12:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:54,445 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 17:12:54,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 17:12:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 17:12:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 17:12:54,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:12:54,446 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:12:54,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:54,661 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-23 17:12:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:12:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492695, now seen corresponding path program 2 times [2020-12-23 17:12:54,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:12:54,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804002736] [2020-12-23 17:12:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:12:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:12:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 17:12:54,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804002736] [2020-12-23 17:12:54,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224099792] [2020-12-23 17:12:54,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:54,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 17:12:54,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 17:12:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 17:12:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 17:12:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 17:12:54,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 17:12:54,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2020-12-23 17:12:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819340660] [2020-12-23 17:12:54,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:12:54,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:12:54,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:12:54,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:12:54,843 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-12-23 17:12:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:12:54,862 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-23 17:12:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:12:54,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 17:12:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:12:54,863 INFO L225 Difference]: With dead ends: 9 [2020-12-23 17:12:54,863 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 17:12:54,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 17:12:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 17:12:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 17:12:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 17:12:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 17:12:54,864 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-23 17:12:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:12:54,865 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 17:12:54,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:12:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 17:12:54,865 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 17:12:55,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 17:12:55,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:12:55 BoogieIcfgContainer [2020-12-23 17:12:55,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:12:55,088 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:12:55,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:12:55,088 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:12:55,089 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:12:53" (3/4) ... [2020-12-23 17:12:55,093 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 17:12:55,105 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-23 17:12:55,106 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-23 17:12:55,106 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 17:12:55,142 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-memsafety/memset.c-witness.graphml [2020-12-23 17:12:55,142 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:12:55,145 INFO L168 Benchmark]: Toolchain (without parser) took 2540.79 ms. Allocated memory was 174.1 MB in the beginning and 224.4 MB in the end (delta: 50.3 MB). Free memory was 153.7 MB in the beginning and 175.3 MB in the end (delta: -21.6 MB). Peak memory consumption was 28.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,145 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 174.1 MB. Free memory is still 144.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:12:55,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 210.13 ms. Allocated memory is still 174.1 MB. Free memory was 153.5 MB in the beginning and 144.9 MB in the end (delta: 8.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.38 ms. Allocated memory is still 174.1 MB. Free memory was 144.9 MB in the beginning and 143.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,148 INFO L168 Benchmark]: Boogie Preprocessor took 34.81 ms. Allocated memory is still 174.1 MB. Free memory was 143.5 MB in the beginning and 157.4 MB in the end (delta: -13.8 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,149 INFO L168 Benchmark]: RCFGBuilder took 411.36 ms. Allocated memory is still 174.1 MB. Free memory was 157.4 MB in the beginning and 146.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,149 INFO L168 Benchmark]: TraceAbstraction took 1785.84 ms. Allocated memory was 174.1 MB in the beginning and 224.4 MB in the end (delta: 50.3 MB). Free memory was 145.9 MB in the beginning and 177.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,150 INFO L168 Benchmark]: Witness Printer took 54.46 ms. Allocated memory is still 224.4 MB. Free memory was 177.4 MB in the beginning and 175.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:12:55,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 174.1 MB. Free memory is still 144.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 210.13 ms. Allocated memory is still 174.1 MB. Free memory was 153.5 MB in the beginning and 144.9 MB in the end (delta: 8.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 34.38 ms. Allocated memory is still 174.1 MB. Free memory was 144.9 MB in the beginning and 143.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.81 ms. Allocated memory is still 174.1 MB. Free memory was 143.5 MB in the beginning and 157.4 MB in the end (delta: -13.8 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 411.36 ms. Allocated memory is still 174.1 MB. Free memory was 157.4 MB in the beginning and 146.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1785.84 ms. Allocated memory was 174.1 MB in the beginning and 224.4 MB in the end (delta: 50.3 MB). Free memory was 145.9 MB in the beginning and 177.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * Witness Printer took 54.46 ms. Allocated memory is still 224.4 MB. Free memory was 177.4 MB in the beginning and 175.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 20 SDslu, 21 SDs, 0 SdLazy, 40 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 48 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 41 ConstructedInterpolants, 1 QuantifiedInterpolants, 1433 SizeOfPredicates, 3 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 3/8 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...