./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d 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_1.3.100.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/termination-crafted/NonTermination3-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash 76e89a58b9c6f7059fcf416ee7a1666558a3d440 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:17:47,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:17:47,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:17:47,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:17:47,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:17:47,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:17:47,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:17:47,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:17:47,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:17:47,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:17:47,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:17:47,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:17:47,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:17:47,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:17:47,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:17:47,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:17:47,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:17:47,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:17:47,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:17:47,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:17:47,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:17:47,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:17:47,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:17:47,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:17:47,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:17:47,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:17:47,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:17:47,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:17:47,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:17:47,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:17:47,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:17:47,378 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:17:47,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:17:47,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:17:47,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:17:47,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:17:47,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:17:47,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:17:47,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:17:47,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:17:47,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:17:47,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-10-20 06:17:47,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:17:47,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:17:47,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:17:47,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:17:47,442 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:17:47,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:17:47,443 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:17:47,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:17:47,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:17:47,444 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:17:47,444 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:17:47,444 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:17:47,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:17:47,447 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:17:47,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:17:47,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:17:47,448 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:17:47,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:17:47,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:17:47,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:17:47,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:17:47,449 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:17:47,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:17:47,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:17:47,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:17:47,452 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2020-10-20 06:17:47,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:17:47,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:17:47,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:17:47,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:17:47,726 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:17:47,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-10-20 06:17:47,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e2b3769/142d2ef1ee7f4aa0966d5ee44c0b0d21/FLAG505da53d8 [2020-10-20 06:17:48,247 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:17:48,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-10-20 06:17:48,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e2b3769/142d2ef1ee7f4aa0966d5ee44c0b0d21/FLAG505da53d8 [2020-10-20 06:17:48,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e2b3769/142d2ef1ee7f4aa0966d5ee44c0b0d21 [2020-10-20 06:17:48,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:17:48,660 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:17:48,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:17:48,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:17:48,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:17:48,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6d03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48, skipping insertion in model container [2020-10-20 06:17:48,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:17:48,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:17:48,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:17:48,926 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:17:48,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:17:48,967 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:17:48,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48 WrapperNode [2020-10-20 06:17:48,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:17:48,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:17:48,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:17:48,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:17:48,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:48,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (1/1) ... [2020-10-20 06:17:49,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:17:49,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:17:49,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:17:49,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:17:49,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (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 [2020-10-20 06:17:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:17:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:17:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:17:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:17:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:17:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:17:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:17:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:17:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:17:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:17:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:17:49,312 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:17:49,313 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-20 06:17:49,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:49 BoogieIcfgContainer [2020-10-20 06:17:49,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:17:49,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:17:49,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:17:49,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:17:49,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:17:48" (1/3) ... [2020-10-20 06:17:49,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb16c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:17:49, skipping insertion in model container [2020-10-20 06:17:49,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:17:48" (2/3) ... [2020-10-20 06:17:49,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb16c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:17:49, skipping insertion in model container [2020-10-20 06:17:49,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:49" (3/3) ... [2020-10-20 06:17:49,323 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2020-10-20 06:17:49,335 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:17:49,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-10-20 06:17:49,365 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-20 06:17:49,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:17:49,401 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:17:49,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:17:49,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:17:49,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:17:49,402 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:17:49,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:17:49,403 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:17:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-20 06:17:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:17:49,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:49,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:49,442 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763092, now seen corresponding path program 1 times [2020-10-20 06:17:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:49,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273956139] [2020-10-20 06:17:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:49,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273956139] [2020-10-20 06:17:49,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:49,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:49,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902163174] [2020-10-20 06:17:49,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:49,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:49,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:49,741 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-10-20 06:17:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:49,852 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-20 06:17:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:49,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 06:17:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:49,866 INFO L225 Difference]: With dead ends: 33 [2020-10-20 06:17:49,866 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 06:17:49,869 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 [2020-10-20 06:17:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 06:17:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-20 06:17:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 06:17:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-20 06:17:49,929 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2020-10-20 06:17:49,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:49,929 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-20 06:17:49,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-20 06:17:49,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 06:17:49,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:49,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:49,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:17:49,931 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1254763091, now seen corresponding path program 1 times [2020-10-20 06:17:49,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:49,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930373425] [2020-10-20 06:17:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:50,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930373425] [2020-10-20 06:17:50,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:50,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:17:50,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843936666] [2020-10-20 06:17:50,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:50,038 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-10-20 06:17:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:50,123 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 06:17:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:50,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 06:17:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:50,126 INFO L225 Difference]: With dead ends: 24 [2020-10-20 06:17:50,126 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 06:17:50,127 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 [2020-10-20 06:17:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 06:17:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 06:17:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 06:17:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 06:17:50,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2020-10-20 06:17:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:50,135 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 06:17:50,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 06:17:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 06:17:50,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:50,136 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:50,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:17:50,136 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash 707835031, now seen corresponding path program 1 times [2020-10-20 06:17:50,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:50,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254415785] [2020-10-20 06:17:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:50,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254415785] [2020-10-20 06:17:50,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383808921] [2020-10-20 06:17:50,281 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 [2020-10-20 06:17:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:17:50,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:50,437 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-20 06:17:50,438 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:17:50,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:17:50,451 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:17:50,451 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-20 06:17:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:50,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:50,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-10-20 06:17:50,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265444945] [2020-10-20 06:17:50,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:17:50,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:17:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:17:50,496 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-20 06:17:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:50,600 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-20 06:17:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:17:50,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-20 06:17:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:50,602 INFO L225 Difference]: With dead ends: 30 [2020-10-20 06:17:50,603 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 06:17:50,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:17:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 06:17:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 06:17:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 06:17:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-20 06:17:50,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2020-10-20 06:17:50,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:50,609 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-20 06:17:50,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:17:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-20 06:17:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 06:17:50,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:50,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:50,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 06:17:50,812 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash 671779276, now seen corresponding path program 1 times [2020-10-20 06:17:50,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:50,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883162448] [2020-10-20 06:17:50,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 06:17:50,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883162448] [2020-10-20 06:17:50,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:50,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:17:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657043325] [2020-10-20 06:17:50,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:17:50,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:50,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:17:50,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:17:50,953 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-10-20 06:17:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:51,062 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-20 06:17:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:17:51,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-20 06:17:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:51,064 INFO L225 Difference]: With dead ends: 33 [2020-10-20 06:17:51,064 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 06:17:51,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-20 06:17:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 06:17:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-20 06:17:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 06:17:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-20 06:17:51,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-20 06:17:51,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:51,070 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-20 06:17:51,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:17:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-20 06:17:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:17:51,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:51,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:51,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:17:51,072 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -649672835, now seen corresponding path program 1 times [2020-10-20 06:17:51,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960004133] [2020-10-20 06:17:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 06:17:51,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960004133] [2020-10-20 06:17:51,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:17:51,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:17:51,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17278493] [2020-10-20 06:17:51,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:17:51,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:51,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:17:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:51,129 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-20 06:17:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:51,183 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-20 06:17:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:17:51,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 06:17:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:51,184 INFO L225 Difference]: With dead ends: 30 [2020-10-20 06:17:51,185 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 06:17:51,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:17:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 06:17:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 06:17:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 06:17:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-20 06:17:51,192 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2020-10-20 06:17:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:51,192 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-20 06:17:51,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:17:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-20 06:17:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 06:17:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:51,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:51,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 06:17:51,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1334976847, now seen corresponding path program 1 times [2020-10-20 06:17:51,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:51,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695410513] [2020-10-20 06:17:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:51,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695410513] [2020-10-20 06:17:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675908704] [2020-10-20 06:17:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 06:17:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 06:17:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:51,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:51,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-20 06:17:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356649794] [2020-10-20 06:17:51,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:17:51,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:17:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:17:51,440 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-20 06:17:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:51,502 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-20 06:17:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:17:51,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-20 06:17:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:51,504 INFO L225 Difference]: With dead ends: 37 [2020-10-20 06:17:51,504 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 06:17:51,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:17:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 06:17:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-20 06:17:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 06:17:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-20 06:17:51,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-10-20 06:17:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:51,509 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-20 06:17:51,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:17:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-20 06:17:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 06:17:51,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:51,510 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:51,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:51,711 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1360643474, now seen corresponding path program 2 times [2020-10-20 06:17:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614307065] [2020-10-20 06:17:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:51,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614307065] [2020-10-20 06:17:51,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889409922] [2020-10-20 06:17:51,807 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:51,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 06:17:51,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:17:51,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 06:17:51,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:17:51,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2020-10-20 06:17:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069309548] [2020-10-20 06:17:51,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:17:51,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:17:51,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-20 06:17:51,932 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 5 states. [2020-10-20 06:17:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:51,969 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-20 06:17:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:17:51,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-20 06:17:51,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:51,970 INFO L225 Difference]: With dead ends: 33 [2020-10-20 06:17:51,971 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 06:17:51,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-20 06:17:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 06:17:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 06:17:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 06:17:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-20 06:17:51,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2020-10-20 06:17:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:51,975 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-20 06:17:51,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:17:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-20 06:17:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 06:17:51,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:51,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:52,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:52,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -775549161, now seen corresponding path program 1 times [2020-10-20 06:17:52,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:52,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898155518] [2020-10-20 06:17:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:52,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:52,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898155518] [2020-10-20 06:17:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346490095] [2020-10-20 06:17:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 06:17:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:52,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:52,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-20 06:17:52,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070198516] [2020-10-20 06:17:52,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 06:17:52,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 06:17:52,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:17:52,333 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 9 states. [2020-10-20 06:17:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:52,400 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-20 06:17:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 06:17:52,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-20 06:17:52,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:52,401 INFO L225 Difference]: With dead ends: 37 [2020-10-20 06:17:52,401 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 06:17:52,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:17:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 06:17:52,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-20 06:17:52,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 06:17:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-20 06:17:52,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2020-10-20 06:17:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:52,406 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-20 06:17:52,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 06:17:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-20 06:17:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-20 06:17:52,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:52,407 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:52,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:52,617 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:52,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:52,619 INFO L82 PathProgramCache]: Analyzing trace with hash -105276236, now seen corresponding path program 2 times [2020-10-20 06:17:52,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:52,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691029869] [2020-10-20 06:17:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:52,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691029869] [2020-10-20 06:17:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99286339] [2020-10-20 06:17:52,700 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:52,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 06:17:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:17:52,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:52,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:52,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-20 06:17:52,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157003878] [2020-10-20 06:17:52,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 06:17:52,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:52,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 06:17:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:17:52,772 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 10 states. [2020-10-20 06:17:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:52,827 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-20 06:17:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:17:52,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-20 06:17:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:52,829 INFO L225 Difference]: With dead ends: 41 [2020-10-20 06:17:52,829 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 06:17:52,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:17:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 06:17:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-20 06:17:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 06:17:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-20 06:17:52,834 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-10-20 06:17:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:52,834 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-20 06:17:52,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 06:17:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-20 06:17:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 06:17:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:52,836 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:53,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:53,046 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1144843311, now seen corresponding path program 3 times [2020-10-20 06:17:53,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:53,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255630493] [2020-10-20 06:17:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:53,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255630493] [2020-10-20 06:17:53,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993818376] [2020-10-20 06:17:53,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:53,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-20 06:17:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 06:17:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:53,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:53,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-20 06:17:53,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823598923] [2020-10-20 06:17:53,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 06:17:53,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:53,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 06:17:53,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-20 06:17:53,233 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2020-10-20 06:17:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:53,306 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-20 06:17:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 06:17:53,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-20 06:17:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:53,307 INFO L225 Difference]: With dead ends: 45 [2020-10-20 06:17:53,307 INFO L226 Difference]: Without dead ends: 45 [2020-10-20 06:17:53,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-20 06:17:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-20 06:17:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-20 06:17:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 06:17:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-20 06:17:53,312 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-10-20 06:17:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:53,312 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-20 06:17:53,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 06:17:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-20 06:17:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-20 06:17:53,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:53,313 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:53,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:53,523 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:53,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:53,523 INFO L82 PathProgramCache]: Analyzing trace with hash -539904914, now seen corresponding path program 4 times [2020-10-20 06:17:53,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:53,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980262327] [2020-10-20 06:17:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:53,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:53,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980262327] [2020-10-20 06:17:53,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063666547] [2020-10-20 06:17:53,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:53,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 06:17:53,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 06:17:53,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:53,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:53,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-20 06:17:53,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334279327] [2020-10-20 06:17:53,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 06:17:53,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:53,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 06:17:53,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-20 06:17:53,712 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2020-10-20 06:17:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:53,778 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-20 06:17:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 06:17:53,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-20 06:17:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:53,779 INFO L225 Difference]: With dead ends: 49 [2020-10-20 06:17:53,779 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 06:17:53,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-20 06:17:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 06:17:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-20 06:17:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-20 06:17:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-20 06:17:53,784 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2020-10-20 06:17:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:53,784 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-20 06:17:53,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 06:17:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-20 06:17:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-20 06:17:53,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:53,786 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:53,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:53,996 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 607436427, now seen corresponding path program 5 times [2020-10-20 06:17:53,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:53,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389212295] [2020-10-20 06:17:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:54,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:54,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389212295] [2020-10-20 06:17:54,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719526527] [2020-10-20 06:17:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:54,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-20 06:17:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 06:17:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:54,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:54,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-20 06:17:54,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532419327] [2020-10-20 06:17:54,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 06:17:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 06:17:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-20 06:17:54,200 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-10-20 06:17:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:54,275 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-20 06:17:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 06:17:54,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-20 06:17:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:54,276 INFO L225 Difference]: With dead ends: 53 [2020-10-20 06:17:54,276 INFO L226 Difference]: Without dead ends: 53 [2020-10-20 06:17:54,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-20 06:17:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-20 06:17:54,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-10-20 06:17:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-20 06:17:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-20 06:17:54,282 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2020-10-20 06:17:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:54,282 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-20 06:17:54,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 06:17:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-20 06:17:54,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-20 06:17:54,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:54,292 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:54,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 06:17:54,503 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash 228291112, now seen corresponding path program 6 times [2020-10-20 06:17:54,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:54,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880343222] [2020-10-20 06:17:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:17:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:17:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:54,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880343222] [2020-10-20 06:17:54,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96740579] [2020-10-20 06:17:54,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:54,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-20 06:17:54,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:17:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 06:17:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:17:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:17:54,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:17:54,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-20 06:17:54,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085754364] [2020-10-20 06:17:54,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 06:17:54,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:17:54,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 06:17:54,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-20 06:17:54,807 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 14 states. [2020-10-20 06:17:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:17:54,883 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-20 06:17:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 06:17:54,884 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-20 06:17:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:17:54,885 INFO L225 Difference]: With dead ends: 54 [2020-10-20 06:17:54,885 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 06:17:54,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-20 06:17:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 06:17:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-20 06:17:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 06:17:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-20 06:17:54,895 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2020-10-20 06:17:54,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:17:54,896 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-20 06:17:54,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 06:17:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-20 06:17:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-20 06:17:54,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:17:54,901 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:17:55,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:17:55,112 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr6ENSURES_VIOLATIONMEMORY_LEAK, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:17:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:17:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1223356603, now seen corresponding path program 7 times [2020-10-20 06:17:55,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:17:55,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393844496] [2020-10-20 06:17:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:17:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:17:55,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:17:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:17:55,165 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:17:55,189 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:17:55,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:17:55,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 06:17:55,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:17:55 BoogieIcfgContainer [2020-10-20 06:17:55,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:17:55,231 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:17:55,231 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:17:55,231 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:17:55,232 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:17:49" (3/4) ... [2020-10-20 06:17:55,235 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:17:55,294 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:17:55,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:17:55,296 INFO L168 Benchmark]: Toolchain (without parser) took 6641.73 ms. Allocated memory was 36.2 MB in the beginning and 65.5 MB in the end (delta: 29.4 MB). Free memory was 16.7 MB in the beginning and 16.8 MB in the end (delta: -117.9 kB). Peak memory consumption was 29.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,297 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 34.1 MB. Free memory was 9.9 MB in the beginning and 9.8 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,298 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.62 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 15.8 MB in the beginning and 26.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,298 INFO L168 Benchmark]: Boogie Preprocessor took 33.13 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,299 INFO L168 Benchmark]: RCFGBuilder took 313.21 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 24.8 MB in the beginning and 23.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,300 INFO L168 Benchmark]: TraceAbstraction took 5914.25 ms. Allocated memory was 46.7 MB in the beginning and 65.5 MB in the end (delta: 18.9 MB). Free memory was 22.9 MB in the beginning and 19.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,301 INFO L168 Benchmark]: Witness Printer took 63.55 ms. Allocated memory is still 65.5 MB. Free memory was 19.8 MB in the beginning and 16.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:17:55,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 34.1 MB. Free memory was 9.9 MB in the beginning and 9.8 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 306.62 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 15.8 MB in the beginning and 26.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 33.13 ms. Allocated memory is still 44.6 MB. Free memory was 26.6 MB in the beginning and 25.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 313.21 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 24.8 MB in the beginning and 23.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 5914.25 ms. Allocated memory was 46.7 MB in the beginning and 65.5 MB in the end (delta: 18.9 MB). Free memory was 22.9 MB in the beginning and 19.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.3 GB. * Witness Printer took 63.55 ms. Allocated memory is still 65.5 MB. Free memory was 19.8 MB in the beginning and 16.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; VAL [a={2:0}, i=0, n=0] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, a={2:0}, i=0, n=0] [L13] ++n VAL [a={2:0}, i=0, n=1] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, a={2:0}, i=0, n=1] [L13] ++n VAL [a={2:0}, i=0, n=2] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=3, a={2:0}, i=0, n=2] [L13] ++n VAL [a={2:0}, i=0, n=3] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, a={2:0}, i=0, n=3] [L13] ++n VAL [a={2:0}, i=0, n=4] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-4, a={2:0}, i=0, n=4] [L13] ++n VAL [a={2:0}, i=0, n=5] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, a={2:0}, i=0, n=5] [L13] ++n VAL [a={2:0}, i=0, n=6] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-5, a={2:0}, i=0, n=6] [L13] ++n VAL [a={2:0}, i=0, n=7] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=6, a={2:0}, i=0, n=7] [L13] ++n VAL [a={2:0}, i=0, n=8] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-6, a={2:0}, i=0, n=8] [L13] ++n VAL [a={2:0}, i=0, n=9] [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=7, a={2:0}, i=0, n=9] [L13] ++n VAL [a={2:0}, i=0, n=10] [L13] COND FALSE !(n < 10) VAL [a={2:0}, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, i=0, n=10] [L17] EXPR a[i] VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=9, i=0, n=10] [L17] 0 <= i && i < 10 && a[i] >= 0 VAL [0 <= i && i < 10 && a[i] >= 0=1, a={2:0}, a[i]=9, i=0, n=10] [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 208 SDslu, 581 SDs, 0 SdLazy, 608 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 401 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=13, 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, 13 MinimizatonAttempts, 25 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 710 NumberOfCodeBlocks, 694 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 635 ConstructedInterpolants, 1 QuantifiedInterpolants, 63976 SizeOfPredicates, 7 NumberOfNonLiveVariables, 967 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 58/1126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...