/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/memset2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:20:06,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:20:06,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:20:06,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:20:06,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:20:06,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:20:06,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:20:06,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:20:06,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:20:06,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:20:06,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:20:06,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:20:06,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:20:06,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:20:06,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:20:06,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:20:06,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:20:06,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:20:06,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:20:06,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:20:06,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:20:06,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:20:06,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:20:06,722 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:20:06,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:20:06,738 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:20:06,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:20:06,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:20:06,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:20:06,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:20:06,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:20:06,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:20:06,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:20:06,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:20:06,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:20:06,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:20:06,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:20:06,806 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:20:06,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:20:06,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:20:06,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:20:06,812 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:20:06,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:20:06,812 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:20:06,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:20:06,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:20:06,813 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:20:06,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:20:06,814 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:20:06,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:20:06,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:20:06,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:20:06,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:20:06,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:20:06,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:20:06,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:20:06,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:20:06,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:20:06,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:20:06,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:20:06,817 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:20:06,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:20:07,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:20:07,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:20:07,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:20:07,246 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:20:07,249 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:20:07,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memset2.c [2020-12-22 19:20:07,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2184595f/c7a707952c7d4f03a9dc55ef6d102827/FLAGcd25104db [2020-12-22 19:20:07,933 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:20:07,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memset2.c [2020-12-22 19:20:07,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2184595f/c7a707952c7d4f03a9dc55ef6d102827/FLAGcd25104db [2020-12-22 19:20:08,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2184595f/c7a707952c7d4f03a9dc55ef6d102827 [2020-12-22 19:20:08,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:20:08,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:20:08,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:20:08,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:20:08,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:20:08,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300de086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08, skipping insertion in model container [2020-12-22 19:20:08,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:20:08,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:20:08,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:20:08,515 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:20:08,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:20:08,549 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:20:08,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08 WrapperNode [2020-12-22 19:20:08,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:20:08,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:20:08,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:20:08,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:20:08,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:20:08,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:20:08,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:20:08,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:20:08,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (1/1) ... [2020-12-22 19:20:08,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:20:08,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:20:08,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:20:08,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:20:08,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (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 19:20:08,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:20:08,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:20:08,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:20:08,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:20:08,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:20:08,907 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 19:20:08,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:08 BoogieIcfgContainer [2020-12-22 19:20:08,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:20:08,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:20:08,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:20:08,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:20:08,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:08" (1/3) ... [2020-12-22 19:20:08,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d156d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:08, skipping insertion in model container [2020-12-22 19:20:08,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:08" (2/3) ... [2020-12-22 19:20:08,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d156d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:08, skipping insertion in model container [2020-12-22 19:20:08,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:08" (3/3) ... [2020-12-22 19:20:08,926 INFO L111 eAbstractionObserver]: Analyzing ICFG memset2.c [2020-12-22 19:20:08,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:20:08,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 19:20:08,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 19:20:09,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:20:09,042 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:20:09,042 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:20:09,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:20:09,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:20:09,045 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:20:09,045 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:20:09,045 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:20:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-22 19:20:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-22 19:20:09,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-22 19:20:09,079 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-12-22 19:20:09,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927318083] [2020-12-22 19:20:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,303 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 19:20:09,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927318083] [2020-12-22 19:20:09,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:20:09,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:20:09,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35971888] [2020-12-22 19:20:09,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:20:09,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:20:09,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:20:09,332 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-22 19:20:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,379 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-22 19:20:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:20:09,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-22 19:20:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,398 INFO L225 Difference]: With dead ends: 11 [2020-12-22 19:20:09,398 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 19:20:09,401 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 19:20:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 19:20:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 19:20:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 19:20:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 19:20:09,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2020-12-22 19:20:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,445 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 19:20:09,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:20:09,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 19:20:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 19:20:09,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 19:20:09,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:20:09,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-12-22 19:20:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336050482] [2020-12-22 19:20:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,563 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 19:20:09,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336050482] [2020-12-22 19:20:09,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:20:09,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:20:09,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323852292] [2020-12-22 19:20:09,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:20:09,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:20:09,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:20:09,567 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2020-12-22 19:20:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,584 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-12-22 19:20:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:20:09,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 19:20:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,586 INFO L225 Difference]: With dead ends: 8 [2020-12-22 19:20:09,586 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 19:20:09,587 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 19:20:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 19:20:09,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 19:20:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 19:20:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 19:20:09,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2020-12-22 19:20:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,591 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 19:20:09,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:20:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 19:20:09,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:20:09,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:20:09,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:20:09,593 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2020-12-22 19:20:09,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216582235] [2020-12-22 19:20:09,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,665 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 19:20:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216582235] [2020-12-22 19:20:09,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:20:09,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:20:09,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231186303] [2020-12-22 19:20:09,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:20:09,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:20:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:20:09,668 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2020-12-22 19:20:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,695 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-22 19:20:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:20:09,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:20:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,697 INFO L225 Difference]: With dead ends: 9 [2020-12-22 19:20:09,697 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 19:20:09,697 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 [2020-12-22 19:20:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 19:20:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 19:20:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 19:20:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 19:20:09,700 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 19:20:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,701 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 19:20:09,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:20:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 19:20:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 19:20:09,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:20:09,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:20:09,702 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:09,703 INFO L82 PathProgramCache]: Analyzing trace with hash 87920521, now seen corresponding path program 1 times [2020-12-22 19:20:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:09,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195802705] [2020-12-22 19:20:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:20:09,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195802705] [2020-12-22 19:20:09,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796235355] [2020-12-22 19:20:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 19:20:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 19:20:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:20:09,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:20:09,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 19:20:09,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760390732] [2020-12-22 19:20:09,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:20:09,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:20:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:09,901 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2020-12-22 19:20:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:09,919 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-12-22 19:20:09,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:20:09,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-12-22 19:20:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:09,920 INFO L225 Difference]: With dead ends: 10 [2020-12-22 19:20:09,920 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 19:20:09,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 19:20:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 19:20:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 19:20:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 19:20:09,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 19:20:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:09,924 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 19:20:09,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:20:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 19:20:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 19:20:09,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:20:09,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:20:10,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:10,142 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-22 19:20:10,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:20:10,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492695, now seen corresponding path program 2 times [2020-12-22 19:20:10,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:20:10,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488487349] [2020-12-22 19:20:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:20:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:20:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:20:10,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488487349] [2020-12-22 19:20:10,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712002499] [2020-12-22 19:20:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 19:20:10,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 19:20:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:20:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 19:20:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:20:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 19:20:10,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:20:10,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2020-12-22 19:20:10,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986048641] [2020-12-22 19:20:10,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:20:10,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:20:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:20:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:20:10,327 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 4 states. [2020-12-22 19:20:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:20:10,343 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-22 19:20:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:20:10,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-22 19:20:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:20:10,344 INFO L225 Difference]: With dead ends: 9 [2020-12-22 19:20:10,344 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 19:20:10,345 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 [2020-12-22 19:20:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 19:20:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 19:20:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 19:20:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 19:20:10,346 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-22 19:20:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:20:10,347 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 19:20:10,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:20:10,347 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 19:20:10,347 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 19:20:10,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:20:10,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:20:10 BoogieIcfgContainer [2020-12-22 19:20:10,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:20:10,568 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:20:10,568 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:20:10,569 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:20:10,569 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:08" (3/4) ... [2020-12-22 19:20:10,573 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 19:20:10,587 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-22 19:20:10,588 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-22 19:20:10,588 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 19:20:10,637 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-memsafety/memset2.c-witness.graphml [2020-12-22 19:20:10,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:20:10,640 INFO L168 Benchmark]: Toolchain (without parser) took 2311.60 ms. Allocated memory is still 153.1 MB. Free memory was 128.3 MB in the beginning and 72.2 MB in the end (delta: 56.1 MB). Peak memory consumption was 55.7 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,641 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:20:10,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.99 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 119.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,649 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.46 ms. Allocated memory is still 153.1 MB. Free memory was 119.5 MB in the beginning and 118.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,649 INFO L168 Benchmark]: Boogie Preprocessor took 21.30 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 117.2 MB in the end (delta: 905.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,650 INFO L168 Benchmark]: RCFGBuilder took 299.58 ms. Allocated memory is still 153.1 MB. Free memory was 117.1 MB in the beginning and 106.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,651 INFO L168 Benchmark]: TraceAbstraction took 1654.52 ms. Allocated memory is still 153.1 MB. Free memory was 105.6 MB in the beginning and 74.3 MB in the end (delta: 31.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,654 INFO L168 Benchmark]: Witness Printer took 69.31 ms. Allocated memory is still 153.1 MB. Free memory was 74.3 MB in the beginning and 72.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:20:10,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.99 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 119.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.46 ms. Allocated memory is still 153.1 MB. Free memory was 119.5 MB in the beginning and 118.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.30 ms. Allocated memory is still 153.1 MB. Free memory was 118.1 MB in the beginning and 117.2 MB in the end (delta: 905.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 299.58 ms. Allocated memory is still 153.1 MB. Free memory was 117.1 MB in the beginning and 106.0 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1654.52 ms. Allocated memory is still 153.1 MB. Free memory was 105.6 MB in the beginning and 74.3 MB in the end (delta: 31.3 MB). Peak memory consumption was 30.5 MB. Max. memory is 8.0 GB. * Witness Printer took 69.31 ms. Allocated memory is still 153.1 MB. Free memory was 74.3 MB in the beginning and 72.2 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: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: 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: 1.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, 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, 0.1s 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, 0.4s 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...