./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/memsetNonZero3.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 6b14dd63832ca953bb678ff696ab3d8598ab5b62 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:11:30,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:11:30,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:11:30,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:11:30,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:11:30,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:11:30,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:11:30,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:11:30,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:11:30,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:11:30,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:11:30,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:11:30,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:11:30,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:11:30,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:11:30,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:11:30,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:11:30,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:11:30,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:11:30,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:11:30,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:11:30,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:11:30,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:11:30,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:11:30,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:11:30,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:11:30,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:11:30,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:11:30,498 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:11:30,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:11:30,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:11:30,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:11:30,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:11:30,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:11:30,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:11:30,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:11:30,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:11:30,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:11:30,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:11:30,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:11:30,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:11:30,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:11:30,529 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:11:30,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:11:30,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:11:30,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:11:30,531 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:11:30,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:11:30,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:11:30,532 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:11:30,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:11:30,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:11:30,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:11:30,533 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:11:30,533 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:11:30,533 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:11:30,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:11:30,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:11:30,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:11:30,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:11:30,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:11:30,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:11:30,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:11:30,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:11:30,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:11:30,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:11:30,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:11:30,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:11:30,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:11:30,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:11:30,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 6b14dd63832ca953bb678ff696ab3d8598ab5b62 [2020-10-19 18:11:30,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:11:30,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:11:30,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:11:30,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:11:30,882 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:11:30,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c [2020-10-19 18:11:30,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f381169/f3a47190309542a4bd5fa69f7525d1d9/FLAGd71623a3e [2020-10-19 18:11:31,451 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:11:31,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c [2020-10-19 18:11:31,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f381169/f3a47190309542a4bd5fa69f7525d1d9/FLAGd71623a3e [2020-10-19 18:11:31,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f381169/f3a47190309542a4bd5fa69f7525d1d9 [2020-10-19 18:11:31,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:11:31,823 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:11:31,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:11:31,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:11:31,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:11:31,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:11:31" (1/1) ... [2020-10-19 18:11:31,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155cf29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:31, skipping insertion in model container [2020-10-19 18:11:31,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:11:31" (1/1) ... [2020-10-19 18:11:31,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:11:31,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:11:32,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:11:32,101 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:11:32,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:11:32,130 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:11:32,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32 WrapperNode [2020-10-19 18:11:32,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:11:32,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:11:32,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:11:32,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:11:32,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (1/1) ... [2020-10-19 18:11:32,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:11:32,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:11:32,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:11:32,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:11:32,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (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 [2020-10-19 18:11:32,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:11:32,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:11:32,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:11:32,290 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-10-19 18:11:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-10-19 18:11:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:11:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:11:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-10-19 18:11:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:11:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:11:32,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:11:32,409 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-19 18:11:32,504 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:11:32,505 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-19 18:11:32,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:11:32 BoogieIcfgContainer [2020-10-19 18:11:32,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:11:32,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:11:32,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:11:32,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:11:32,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:11:31" (1/3) ... [2020-10-19 18:11:32,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357e55fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:11:32, skipping insertion in model container [2020-10-19 18:11:32,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:11:32" (2/3) ... [2020-10-19 18:11:32,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@357e55fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:11:32, skipping insertion in model container [2020-10-19 18:11:32,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:11:32" (3/3) ... [2020-10-19 18:11:32,539 INFO L111 eAbstractionObserver]: Analyzing ICFG memsetNonZero3.c [2020-10-19 18:11:32,561 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:11:32,569 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-10-19 18:11:32,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-19 18:11:32,626 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:11:32,626 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:11:32,628 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:11:32,629 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:11:32,629 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:11:32,629 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:11:32,629 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:11:32,630 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:11:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 18:11:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-19 18:11:32,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:32,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:32,664 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847368, now seen corresponding path program 1 times [2020-10-19 18:11:32,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:32,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140645542] [2020-10-19 18:11:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:32,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:11:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140645542] [2020-10-19 18:11:32,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:11:32,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:11:32,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836457152] [2020-10-19 18:11:32,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:11:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:11:32,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:11:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:11:32,933 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-10-19 18:11:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:11:33,019 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-19 18:11:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:11:33,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-19 18:11:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:11:33,029 INFO L225 Difference]: With dead ends: 19 [2020-10-19 18:11:33,030 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 18:11:33,032 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 [2020-10-19 18:11:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 18:11:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 18:11:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 18:11:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-19 18:11:33,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2020-10-19 18:11:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:11:33,064 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-19 18:11:33,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:11:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-19 18:11:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-19 18:11:33,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:33,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:33,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:11:33,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:33,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:33,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1092847367, now seen corresponding path program 1 times [2020-10-19 18:11:33,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:33,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950374230] [2020-10-19 18:11:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:11:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:33,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950374230] [2020-10-19 18:11:33,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:11:33,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:11:33,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382858469] [2020-10-19 18:11:33,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:11:33,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:11:33,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:11:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:11:33,140 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2020-10-19 18:11:33,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:11:33,175 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-19 18:11:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:11:33,175 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-19 18:11:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:11:33,176 INFO L225 Difference]: With dead ends: 15 [2020-10-19 18:11:33,177 INFO L226 Difference]: Without dead ends: 15 [2020-10-19 18:11:33,178 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 [2020-10-19 18:11:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-19 18:11:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-19 18:11:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 18:11:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-19 18:11:33,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2020-10-19 18:11:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:11:33,182 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-19 18:11:33,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:11:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-19 18:11:33,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 18:11:33,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:33,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:33,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:11:33,184 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1462327129, now seen corresponding path program 1 times [2020-10-19 18:11:33,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:33,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340508279] [2020-10-19 18:11:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:11:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 18:11:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340508279] [2020-10-19 18:11:33,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:11:33,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:11:33,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629953422] [2020-10-19 18:11:33,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:11:33,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:11:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:11:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:11:33,267 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-19 18:11:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:11:33,341 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-19 18:11:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:11:33,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-19 18:11:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:11:33,343 INFO L225 Difference]: With dead ends: 18 [2020-10-19 18:11:33,343 INFO L226 Difference]: Without dead ends: 16 [2020-10-19 18:11:33,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:11:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-19 18:11:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-19 18:11:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 18:11:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-19 18:11:33,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-19 18:11:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:11:33,349 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-19 18:11:33,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:11:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-19 18:11:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 18:11:33,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:33,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:33,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:11:33,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1971150090, now seen corresponding path program 1 times [2020-10-19 18:11:33,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:33,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044448476] [2020-10-19 18:11:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:11:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 18:11:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:33,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044448476] [2020-10-19 18:11:33,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842021115] [2020-10-19 18:11:33,495 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 [2020-10-19 18:11:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:33,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:11:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:11:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:33,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:11:33,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-10-19 18:11:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709959477] [2020-10-19 18:11:33,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:11:33,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:11:33,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:11:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:11:33,640 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2020-10-19 18:11:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:11:33,733 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-19 18:11:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:11:33,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-19 18:11:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:11:33,736 INFO L225 Difference]: With dead ends: 19 [2020-10-19 18:11:33,736 INFO L226 Difference]: Without dead ends: 17 [2020-10-19 18:11:33,737 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 [2020-10-19 18:11:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-19 18:11:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-19 18:11:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 18:11:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-19 18:11:33,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-19 18:11:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:11:33,742 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-19 18:11:33,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:11:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-19 18:11:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:11:33,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:11:33,744 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:11:33,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:11:33,956 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 18:11:33,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:11:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1034761479, now seen corresponding path program 2 times [2020-10-19 18:11:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:11:33,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619005548] [2020-10-19 18:11:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:11:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:34,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:11:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 18:11:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:11:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:11:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619005548] [2020-10-19 18:11:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318977085] [2020-10-19 18:11:34,051 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 [2020-10-19 18:11:34,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:11:34,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:11:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:11:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:11:34,171 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 [2020-10-19 18:11:34,179 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:11:34,184 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:11:34,185 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. [2020-10-19 18:11:34,186 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2020-10-19 18:11:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-19 18:11:34,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:11:34,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-10-19 18:11:34,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503934917] [2020-10-19 18:11:34,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:11:34,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:11:34,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:11:34,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:11:34,333 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2020-10-19 18:11:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:11:34,421 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-19 18:11:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:11:34,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-19 18:11:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:11:34,422 INFO L225 Difference]: With dead ends: 16 [2020-10-19 18:11:34,423 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 18:11:34,423 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 [2020-10-19 18:11:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 18:11:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 18:11:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 18:11:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 18:11:34,425 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-10-19 18:11:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:11:34,425 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:11:34,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:11:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:11:34,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 18:11:34,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:11:34,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:11:34 BoogieIcfgContainer [2020-10-19 18:11:34,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:11:34,638 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:11:34,638 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:11:34,638 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:11:34,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:11:32" (3/4) ... [2020-10-19 18:11:34,642 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 18:11:34,649 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 18:11:34,649 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.C_memset [2020-10-19 18:11:34,650 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 18:11:34,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-19 18:11:34,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-10-19 18:11:34,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:11:34,655 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 18:11:34,691 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:11:34,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:11:34,693 INFO L168 Benchmark]: Toolchain (without parser) took 2875.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 960.0 MB in the beginning and 974.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 120.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:34,693 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:11:34,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.50 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:34,695 INFO L168 Benchmark]: Boogie Preprocessor took 91.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -175.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:34,696 INFO L168 Benchmark]: RCFGBuilder took 284.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:34,697 INFO L168 Benchmark]: TraceAbstraction took 2128.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 981.3 MB in the end (delta: 123.7 MB). Peak memory consumption was 123.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:34,697 INFO L168 Benchmark]: Witness Printer took 53.02 ms. Allocated memory is still 1.2 GB. Free memory was 981.3 MB in the beginning and 974.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:11:34,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 306.50 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 91.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -175.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 284.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2128.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 981.3 MB in the end (delta: 123.7 MB). Peak memory consumption was 123.7 MB. Max. memory is 11.5 GB. * Witness Printer took 53.02 ms. Allocated memory is still 1.2 GB. Free memory was 981.3 MB in the beginning and 974.7 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 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: 2.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s 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...