./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memset3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memset3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06914024aa49a34ce88c7dcbc25f89730c27c8e4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 03:42:55,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 03:42:55,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 03:42:55,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 03:42:55,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 03:42:55,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 03:42:55,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 03:42:55,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 03:42:55,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 03:42:55,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 03:42:55,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 03:42:55,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 03:42:55,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 03:42:55,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 03:42:55,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 03:42:55,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 03:42:55,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 03:42:55,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 03:42:55,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 03:42:55,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 03:42:55,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 03:42:55,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 03:42:55,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 03:42:55,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 03:42:55,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 03:42:55,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 03:42:55,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 03:42:55,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 03:42:55,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 03:42:55,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 03:42:55,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 03:42:55,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 03:42:55,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 03:42:55,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 03:42:55,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 03:42:55,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 03:42:55,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 03:42:55,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 03:42:55,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 03:42:55,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 03:42:55,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 03:42:55,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-26 03:42:55,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 03:42:55,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 03:42:55,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 03:42:55,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 03:42:55,740 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 03:42:55,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 03:42:55,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 03:42:55,740 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 03:42:55,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 03:42:55,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 03:42:55,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 03:42:55,743 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-26 03:42:55,743 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-26 03:42:55,743 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-26 03:42:55,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 03:42:55,744 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-26 03:42:55,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 03:42:55,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 03:42:55,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 03:42:55,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 03:42:55,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 03:42:55,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 03:42:55,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:42:55,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 03:42:55,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 03:42:55,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 03:42:55,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 03:42:55,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 03:42:55,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06914024aa49a34ce88c7dcbc25f89730c27c8e4 [2020-10-26 03:42:56,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 03:42:56,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 03:42:56,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 03:42:56,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 03:42:56,267 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 03:42:56,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memset3.c [2020-10-26 03:42:56,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea0dfb7d/886fa7e0f49340afa03d73eb5cf59c6d/FLAGecab65802 [2020-10-26 03:42:57,079 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 03:42:57,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memset3.c [2020-10-26 03:42:57,093 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea0dfb7d/886fa7e0f49340afa03d73eb5cf59c6d/FLAGecab65802 [2020-10-26 03:42:57,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea0dfb7d/886fa7e0f49340afa03d73eb5cf59c6d [2020-10-26 03:42:57,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 03:42:57,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-26 03:42:57,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 03:42:57,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 03:42:57,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 03:42:57,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52866935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57, skipping insertion in model container [2020-10-26 03:42:57,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 03:42:57,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 03:42:57,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:42:57,622 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 03:42:57,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:42:57,655 INFO L208 MainTranslator]: Completed translation [2020-10-26 03:42:57,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57 WrapperNode [2020-10-26 03:42:57,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 03:42:57,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 03:42:57,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 03:42:57,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 03:42:57,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (1/1) ... [2020-10-26 03:42:57,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 03:42:57,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 03:42:57,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 03:42:57,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 03:42:57,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (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 [2020-10-26 03:42:57,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 03:42:57,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 03:42:57,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 03:42:57,805 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-10-26 03:42:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-10-26 03:42:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 03:42:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 03:42:57,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-10-26 03:42:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 03:42:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 03:42:57,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 03:42:57,975 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-26 03:42:58,091 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 03:42:58,091 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-26 03:42:58,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:42:58 BoogieIcfgContainer [2020-10-26 03:42:58,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 03:42:58,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 03:42:58,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 03:42:58,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 03:42:58,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 03:42:57" (1/3) ... [2020-10-26 03:42:58,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62580d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:42:58, skipping insertion in model container [2020-10-26 03:42:58,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:42:57" (2/3) ... [2020-10-26 03:42:58,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62580d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:42:58, skipping insertion in model container [2020-10-26 03:42:58,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:42:58" (3/3) ... [2020-10-26 03:42:58,107 INFO L111 eAbstractionObserver]: Analyzing ICFG memset3.c [2020-10-26 03:42:58,124 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 03:42:58,131 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-10-26 03:42:58,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-26 03:42:58,199 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 03:42:58,200 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-26 03:42:58,200 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 03:42:58,200 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 03:42:58,201 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 03:42:58,201 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 03:42:58,201 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 03:42:58,201 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 03:42:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-26 03:42:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-26 03:42:58,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:42:58,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:42:58,231 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-26 03:42:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:42:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2020-10-26 03:42:58,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:42:58,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541542572] [2020-10-26 03:42:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:42:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:58,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:42:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:42:58,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541542572] [2020-10-26 03:42:58,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:42:58,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:42:58,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568100516] [2020-10-26 03:42:58,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:42:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:42:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:42:58,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:42:58,519 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-10-26 03:42:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:42:58,677 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-26 03:42:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:42:58,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-26 03:42:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:42:58,690 INFO L225 Difference]: With dead ends: 19 [2020-10-26 03:42:58,690 INFO L226 Difference]: Without dead ends: 16 [2020-10-26 03:42:58,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:42:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-26 03:42:58,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-26 03:42:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-26 03:42:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-26 03:42:58,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2020-10-26 03:42:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:42:58,734 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-26 03:42:58,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:42:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-26 03:42:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-26 03:42:58,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:42:58,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:42:58,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 03:42:58,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-26 03:42:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:42:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2020-10-26 03:42:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:42:58,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571488569] [2020-10-26 03:42:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:42:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:58,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:42:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:42:58,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571488569] [2020-10-26 03:42:58,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:42:58,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:42:58,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576707010] [2020-10-26 03:42:58,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:42:58,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:42:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:42:58,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:42:58,892 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2020-10-26 03:42:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:42:58,995 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-26 03:42:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:42:58,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-26 03:42:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:42:58,998 INFO L225 Difference]: With dead ends: 15 [2020-10-26 03:42:58,998 INFO L226 Difference]: Without dead ends: 15 [2020-10-26 03:42:59,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:42:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-26 03:42:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-26 03:42:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-26 03:42:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-26 03:42:59,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2020-10-26 03:42:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:42:59,010 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-26 03:42:59,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:42:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-26 03:42:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 03:42:59,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:42:59,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:42:59,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 03:42:59,015 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-26 03:42:59,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:42:59,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2020-10-26 03:42:59,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:42:59,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952563524] [2020-10-26 03:42:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:42:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:42:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 03:42:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:42:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952563524] [2020-10-26 03:42:59,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:42:59,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 03:42:59,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972525676] [2020-10-26 03:42:59,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 03:42:59,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:42:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 03:42:59,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:42:59,187 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-26 03:42:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:42:59,345 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-26 03:42:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 03:42:59,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-26 03:42:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:42:59,347 INFO L225 Difference]: With dead ends: 18 [2020-10-26 03:42:59,347 INFO L226 Difference]: Without dead ends: 16 [2020-10-26 03:42:59,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 03:42:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-26 03:42:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-26 03:42:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-26 03:42:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-26 03:42:59,354 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-26 03:42:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:42:59,355 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-26 03:42:59,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 03:42:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-26 03:42:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-26 03:42:59,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:42:59,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:42:59,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 03:42:59,357 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-26 03:42:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:42:59,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1971150090, now seen corresponding path program 1 times [2020-10-26 03:42:59,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:42:59,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157625556] [2020-10-26 03:42:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:42:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:42:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 03:42:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:42:59,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157625556] [2020-10-26 03:42:59,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459287707] [2020-10-26 03:42:59,453 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 [2020-10-26 03:42:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 03:42:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:42:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:42:59,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-26 03:42:59,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-10-26 03:42:59,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482409084] [2020-10-26 03:42:59,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 03:42:59,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:42:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 03:42:59,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 03:42:59,572 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-10-26 03:42:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:42:59,659 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-26 03:42:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 03:42:59,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-26 03:42:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:42:59,661 INFO L225 Difference]: With dead ends: 19 [2020-10-26 03:42:59,661 INFO L226 Difference]: Without dead ends: 17 [2020-10-26 03:42:59,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-26 03:42:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-26 03:42:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-26 03:42:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-26 03:42:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-26 03:42:59,666 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-26 03:42:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:42:59,667 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-26 03:42:59,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 03:42:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-26 03:42:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 03:42:59,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:42:59,668 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:42:59,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 03:42:59,878 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-26 03:42:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:42:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 2 times [2020-10-26 03:42:59,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:42:59,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40196190] [2020-10-26 03:42:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:42:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:42:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 03:42:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:42:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:42:59,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40196190] [2020-10-26 03:42:59,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108198632] [2020-10-26 03:42:59,980 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 [2020-10-26 03:43:00,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-26 03:43:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-26 03:43:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-26 03:43:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:43:00,104 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2020-10-26 03:43:00,106 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:43:00,110 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:43:00,111 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-26 03:43:00,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-10-26 03:43:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 03:43:00,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-26 03:43:00,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-10-26 03:43:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769307630] [2020-10-26 03:43:00,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 03:43:00,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:43:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 03:43:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-26 03:43:00,222 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-10-26 03:43:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:43:00,292 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-26 03:43:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 03:43:00,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-26 03:43:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:43:00,293 INFO L225 Difference]: With dead ends: 16 [2020-10-26 03:43:00,294 INFO L226 Difference]: Without dead ends: 0 [2020-10-26 03:43:00,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-26 03:43:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-26 03:43:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-26 03:43:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-26 03:43:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-26 03:43:00,295 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-10-26 03:43:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:43:00,296 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-26 03:43:00,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 03:43:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-26 03:43:00,297 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-26 03:43:00,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-26 03:43:00,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 03:43:00 BoogieIcfgContainer [2020-10-26 03:43:00,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 03:43:00,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 03:43:00,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 03:43:00,511 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 03:43:00,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:42:58" (3/4) ... [2020-10-26 03:43:00,516 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-26 03:43:00,523 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-26 03:43:00,523 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2020-10-26 03:43:00,524 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-26 03:43:00,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-26 03:43:00,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-10-26 03:43:00,529 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-26 03:43:00,530 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-26 03:43:00,564 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 03:43:00,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 03:43:00,566 INFO L168 Benchmark]: Toolchain (without parser) took 3136.73 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 30.6 MB in the beginning and 28.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2020-10-26 03:43:00,566 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 37.7 MB. Free memory is still 17.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:43:00,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.81 ms. Allocated memory is still 46.1 MB. Free memory was 29.9 MB in the beginning and 21.2 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-26 03:43:00,568 INFO L168 Benchmark]: Boogie Preprocessor took 35.21 ms. Allocated memory is still 46.1 MB. Free memory was 21.2 MB in the beginning and 19.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:43:00,569 INFO L168 Benchmark]: RCFGBuilder took 400.62 ms. Allocated memory is still 46.1 MB. Free memory was 19.8 MB in the beginning and 21.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-26 03:43:00,570 INFO L168 Benchmark]: TraceAbstraction took 2413.72 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.7 MB in the beginning and 30.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 182.0 kB. Max. memory is 16.1 GB. [2020-10-26 03:43:00,570 INFO L168 Benchmark]: Witness Printer took 53.06 ms. Allocated memory is still 56.6 MB. Free memory was 30.6 MB in the beginning and 28.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 03:43:00,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 37.7 MB. Free memory is still 17.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 222.81 ms. Allocated memory is still 46.1 MB. Free memory was 29.9 MB in the beginning and 21.2 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.21 ms. Allocated memory is still 46.1 MB. Free memory was 21.2 MB in the beginning and 19.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 400.62 ms. Allocated memory is still 46.1 MB. Free memory was 19.8 MB in the beginning and 21.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2413.72 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.7 MB in the beginning and 30.6 MB in the end (delta: -9.9 MB). Peak memory consumption was 182.0 kB. Max. memory is 16.1 GB. * Witness Printer took 53.06 ms. Allocated memory is still 56.6 MB. Free memory was 30.6 MB in the beginning and 28.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: 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 4 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 36 SDslu, 64 SDs, 0 SdLazy, 127 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 0.7s InterpolantComputationTime, 90 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 83 ConstructedInterpolants, 8 QuantifiedInterpolants, 3203 SizeOfPredicates, 2 NumberOfNonLiveVariables, 137 ConjunctsInSsa, 14 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...