./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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/ldv-memsafety/ArraysOfVariableLength6.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 07b05923cf5c1b39a35ab81b524575a0a488c268 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 05:59:46,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:59:46,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:59:46,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:59:46,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:59:46,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:59:46,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:59:46,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:59:46,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:59:46,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:59:46,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:59:46,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:59:46,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:59:46,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:59:46,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:59:46,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:59:46,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:59:46,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:59:46,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:59:46,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:59:46,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:59:46,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:59:46,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:59:46,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:59:46,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:59:46,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:59:46,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:59:46,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:59:46,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:59:46,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:59:46,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:59:46,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:59:46,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:59:46,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:59:46,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:59:46,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:59:46,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:59:46,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:59:46,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:59:46,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:59:46,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:59:46,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 05:59:46,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:59:46,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:59:46,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:59:46,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:59:46,645 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:59:46,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:59:46,645 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:59:46,646 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:59:46,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:59:46,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:59:46,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:59:46,647 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:59:46,648 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:59:46,648 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:59:46,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:59:46,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:59:46,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:59:46,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:59:46,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:59:46,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:59:46,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:59:46,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:59:46,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:59:46,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:59:46,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:59:46,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 05:59:46,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 05:59:46,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:59:46,652 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2020-10-20 05:59:46,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:59:46,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:59:46,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:59:46,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:59:46,879 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:59:46,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-10-20 05:59:46,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91202b8ce/16a5991ec337479eb3bb471e1c1bd779/FLAGc46d5a4de [2020-10-20 05:59:47,399 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:59:47,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-10-20 05:59:47,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91202b8ce/16a5991ec337479eb3bb471e1c1bd779/FLAGc46d5a4de [2020-10-20 05:59:47,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91202b8ce/16a5991ec337479eb3bb471e1c1bd779 [2020-10-20 05:59:47,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:59:47,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:59:47,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:59:47,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:59:47,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:59:47,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:59:47" (1/1) ... [2020-10-20 05:59:47,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@209f2871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:47, skipping insertion in model container [2020-10-20 05:59:47,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:59:47" (1/1) ... [2020-10-20 05:59:47,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:59:47,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:59:48,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:59:48,060 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:59:48,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:59:48,105 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:59:48,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48 WrapperNode [2020-10-20 05:59:48,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:59:48,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:59:48,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:59:48,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:59:48,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (1/1) ... [2020-10-20 05:59:48,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:59:48,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:59:48,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:59:48,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:59:48,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (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 05:59:48,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:59:48,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:59:48,222 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-10-20 05:59:48,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:59:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-10-20 05:59:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 05:59:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:59:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 05:59:48,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 05:59:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:59:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:59:48,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:59:48,531 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:59:48,532 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-20 05:59:48,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:59:48 BoogieIcfgContainer [2020-10-20 05:59:48,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:59:48,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:59:48,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:59:48,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:59:48,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:59:47" (1/3) ... [2020-10-20 05:59:48,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e584a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:59:48, skipping insertion in model container [2020-10-20 05:59:48,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:59:48" (2/3) ... [2020-10-20 05:59:48,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e584a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:59:48, skipping insertion in model container [2020-10-20 05:59:48,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:59:48" (3/3) ... [2020-10-20 05:59:48,544 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2020-10-20 05:59:48,560 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:59:48,568 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-20 05:59:48,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-20 05:59:48,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:59:48,620 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:59:48,620 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:59:48,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:59:48,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:59:48,620 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:59:48,621 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:59:48,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:59:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-20 05:59:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 05:59:48,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:48,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:48,668 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2020-10-20 05:59:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:48,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571427549] [2020-10-20 05:59:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:48,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:48,891 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 05:59:48,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571427549] [2020-10-20 05:59:48,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:59:48,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:59:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660703590] [2020-10-20 05:59:48,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:59:48,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:59:48,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:59:48,912 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 4 states. [2020-10-20 05:59:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:49,102 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-20 05:59:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:59:49,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 05:59:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:49,114 INFO L225 Difference]: With dead ends: 58 [2020-10-20 05:59:49,115 INFO L226 Difference]: Without dead ends: 54 [2020-10-20 05:59:49,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:59:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-20 05:59:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-10-20 05:59:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-20 05:59:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-20 05:59:49,166 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2020-10-20 05:59:49,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:49,166 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-20 05:59:49,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:59:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-20 05:59:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:59:49,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:49,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:49,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 05:59:49,168 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2020-10-20 05:59:49,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:49,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428096664] [2020-10-20 05:59:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:49,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:49,277 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 05:59:49,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428096664] [2020-10-20 05:59:49,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:59:49,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:59:49,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278928262] [2020-10-20 05:59:49,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:59:49,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:49,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:59:49,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:59:49,281 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 4 states. [2020-10-20 05:59:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:49,383 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-20 05:59:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:59:49,384 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 05:59:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:49,387 INFO L225 Difference]: With dead ends: 49 [2020-10-20 05:59:49,387 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 05:59:49,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:59:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 05:59:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-20 05:59:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 05:59:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-20 05:59:49,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2020-10-20 05:59:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:49,396 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-20 05:59:49,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:59:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-20 05:59:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 05:59:49,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:49,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:49,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 05:59:49,398 INFO L429 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:49,399 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2020-10-20 05:59:49,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:49,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350675172] [2020-10-20 05:59:49,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:49,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:49,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350675172] [2020-10-20 05:59:49,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:59:49,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 05:59:49,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984348362] [2020-10-20 05:59:49,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:59:49,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:49,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:59:49,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:59:49,494 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 7 states. [2020-10-20 05:59:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:49,655 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-20 05:59:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:59:49,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-20 05:59:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:49,657 INFO L225 Difference]: With dead ends: 40 [2020-10-20 05:59:49,658 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 05:59:49,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:59:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 05:59:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-20 05:59:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 05:59:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-20 05:59:49,665 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2020-10-20 05:59:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:49,665 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-20 05:59:49,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:59:49,666 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-20 05:59:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 05:59:49,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:49,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:49,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 05:59:49,667 INFO L429 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2020-10-20 05:59:49,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:49,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444863288] [2020-10-20 05:59:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:49,775 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 05:59:49,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444863288] [2020-10-20 05:59:49,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:59:49,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 05:59:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503377885] [2020-10-20 05:59:49,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:59:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:59:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:59:49,778 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 7 states. [2020-10-20 05:59:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:49,970 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-20 05:59:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 05:59:49,971 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-20 05:59:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:49,972 INFO L225 Difference]: With dead ends: 46 [2020-10-20 05:59:49,980 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 05:59:49,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:59:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 05:59:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-20 05:59:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 05:59:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-20 05:59:49,986 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2020-10-20 05:59:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:49,987 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-20 05:59:49,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:59:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-20 05:59:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 05:59:49,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:49,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:49,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 05:59:49,988 INFO L429 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2020-10-20 05:59:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:49,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853768176] [2020-10-20 05:59:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,100 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 05:59:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853768176] [2020-10-20 05:59:50,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:59:50,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:59:50,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946678183] [2020-10-20 05:59:50,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:59:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:59:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:59:50,103 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 5 states. [2020-10-20 05:59:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:50,247 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-20 05:59:50,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:59:50,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-20 05:59:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:50,249 INFO L225 Difference]: With dead ends: 46 [2020-10-20 05:59:50,249 INFO L226 Difference]: Without dead ends: 43 [2020-10-20 05:59:50,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:59:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-20 05:59:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-20 05:59:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-20 05:59:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-20 05:59:50,255 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2020-10-20 05:59:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:50,256 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-20 05:59:50,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:59:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-20 05:59:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 05:59:50,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:50,258 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:50,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 05:59:50,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2020-10-20 05:59:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:50,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303752570] [2020-10-20 05:59:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,308 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 05:59:50,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303752570] [2020-10-20 05:59:50,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827843703] [2020-10-20 05:59:50,310 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 05:59:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 05:59:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:50,405 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 05:59:50,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:50,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2020-10-20 05:59:50,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870715606] [2020-10-20 05:59:50,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:59:50,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:59:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:59:50,407 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2020-10-20 05:59:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:50,521 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-20 05:59:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:59:50,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-20 05:59:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:50,523 INFO L225 Difference]: With dead ends: 52 [2020-10-20 05:59:50,523 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 05:59:50,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:59:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 05:59:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2020-10-20 05:59:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 05:59:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-20 05:59:50,530 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2020-10-20 05:59:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:50,530 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-20 05:59:50,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:59:50,531 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-20 05:59:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:59:50,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:50,532 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:50,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 05:59:50,746 INFO L429 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:50,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2020-10-20 05:59:50,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:50,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212267983] [2020-10-20 05:59:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 05:59:50,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212267983] [2020-10-20 05:59:50,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:59:50,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 05:59:50,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285078927] [2020-10-20 05:59:50,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 05:59:50,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:50,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 05:59:50,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 05:59:50,860 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2020-10-20 05:59:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:51,033 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-20 05:59:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:59:51,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-20 05:59:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:51,035 INFO L225 Difference]: With dead ends: 44 [2020-10-20 05:59:51,035 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 05:59:51,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:59:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 05:59:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-20 05:59:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-20 05:59:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-20 05:59:51,041 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2020-10-20 05:59:51,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:51,041 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-20 05:59:51,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 05:59:51,042 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-20 05:59:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 05:59:51,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:51,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:51,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 05:59:51,044 INFO L429 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:51,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2020-10-20 05:59:51,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:51,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597018887] [2020-10-20 05:59:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:51,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:51,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:51,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597018887] [2020-10-20 05:59:51,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889085225] [2020-10-20 05:59:51,216 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 05:59:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 05:59:51,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:51,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:51,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-20 05:59:51,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075825417] [2020-10-20 05:59:51,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 05:59:51,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 05:59:51,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:59:51,317 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-10-20 05:59:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:51,538 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-20 05:59:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:59:51,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-20 05:59:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:51,540 INFO L225 Difference]: With dead ends: 50 [2020-10-20 05:59:51,540 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 05:59:51,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:59:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 05:59:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-20 05:59:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-20 05:59:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-20 05:59:51,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2020-10-20 05:59:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:51,556 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-20 05:59:51,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 05:59:51,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-20 05:59:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 05:59:51,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:51,557 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:51,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:51,770 INFO L429 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:51,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2020-10-20 05:59:51,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:51,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583952943] [2020-10-20 05:59:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:51,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583952943] [2020-10-20 05:59:51,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611239175] [2020-10-20 05:59:51,825 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 05:59:51,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 05:59:51,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:59:51,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 05:59:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 05:59:51,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:51,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2020-10-20 05:59:51,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336766863] [2020-10-20 05:59:51,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 05:59:51,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 05:59:51,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-20 05:59:51,948 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 11 states. [2020-10-20 05:59:52,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:52,201 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-20 05:59:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:59:52,202 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-20 05:59:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:52,204 INFO L225 Difference]: With dead ends: 58 [2020-10-20 05:59:52,204 INFO L226 Difference]: Without dead ends: 58 [2020-10-20 05:59:52,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-20 05:59:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-20 05:59:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-10-20 05:59:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-20 05:59:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-20 05:59:52,209 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2020-10-20 05:59:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:52,210 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-20 05:59:52,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 05:59:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-20 05:59:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 05:59:52,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:52,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:52,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:52,425 INFO L429 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:52,426 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2020-10-20 05:59:52,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:52,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75213626] [2020-10-20 05:59:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:52,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:52,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:52,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75213626] [2020-10-20 05:59:52,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741687927] [2020-10-20 05:59:52,593 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 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 05:59:52,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 05:59:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:59:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 05:59:52,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:52,689 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 05:59:52,690 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 05:59:52,690 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:52,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:52,697 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 05:59:52,698 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-10-20 05:59:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 05:59:52,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 05:59:52,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2020-10-20 05:59:52,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460601561] [2020-10-20 05:59:52,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:59:52,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:52,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:59:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:59:52,839 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 4 states. [2020-10-20 05:59:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:52,873 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-20 05:59:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:59:52,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-20 05:59:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:52,875 INFO L225 Difference]: With dead ends: 40 [2020-10-20 05:59:52,875 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 05:59:52,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:59:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 05:59:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-20 05:59:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 05:59:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-20 05:59:52,884 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2020-10-20 05:59:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:52,884 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-20 05:59:52,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:59:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-20 05:59:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 05:59:52,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:52,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:53,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:53,090 INFO L429 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:53,091 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2020-10-20 05:59:53,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:53,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65095526] [2020-10-20 05:59:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:53,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:53,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:53,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65095526] [2020-10-20 05:59:53,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598221311] [2020-10-20 05:59:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:59:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 05:59:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:53,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:53,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-20 05:59:53,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210830628] [2020-10-20 05:59:53,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 05:59:53,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:53,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 05:59:53,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-20 05:59:53,337 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-10-20 05:59:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:53,610 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-20 05:59:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:59:53,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-20 05:59:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:53,611 INFO L225 Difference]: With dead ends: 52 [2020-10-20 05:59:53,612 INFO L226 Difference]: Without dead ends: 49 [2020-10-20 05:59:53,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:59:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-20 05:59:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-20 05:59:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-20 05:59:53,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-20 05:59:53,623 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-10-20 05:59:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:53,626 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-20 05:59:53,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 05:59:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-20 05:59:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 05:59:53,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:53,628 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:53,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-20 05:59:53,829 INFO L429 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2020-10-20 05:59:53,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:53,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132353029] [2020-10-20 05:59:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:53,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:53,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:54,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132353029] [2020-10-20 05:59:54,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949081457] [2020-10-20 05:59:54,019 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 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 05:59:54,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 05:59:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:59:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 05:59:54,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:54,081 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_25|]} [2020-10-20 05:59:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:59:54,090 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 05:59:54,091 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:54,101 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:59:54,110 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-20 05:59:54,111 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:54,120 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:54,121 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 05:59:54,121 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-10-20 05:59:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 05:59:54,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 05:59:54,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2020-10-20 05:59:54,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376593282] [2020-10-20 05:59:54,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:59:54,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:59:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:59:54,257 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-10-20 05:59:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:54,308 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-20 05:59:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:59:54,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-20 05:59:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:54,310 INFO L225 Difference]: With dead ends: 50 [2020-10-20 05:59:54,310 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 05:59:54,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:59:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 05:59:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-20 05:59:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-20 05:59:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-20 05:59:54,320 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2020-10-20 05:59:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:54,321 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-20 05:59:54,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:59:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-20 05:59:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-20 05:59:54,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:54,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:54,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:54,533 INFO L429 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2020-10-20 05:59:54,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:54,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240230343] [2020-10-20 05:59:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:54,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 05:59:54,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240230343] [2020-10-20 05:59:54,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655383916] [2020-10-20 05:59:54,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:59:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 05:59:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:59:54,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:54,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-10-20 05:59:54,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397193211] [2020-10-20 05:59:54,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 05:59:54,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 05:59:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:59:54,733 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-20 05:59:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:54,997 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-10-20 05:59:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 05:59:54,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-20 05:59:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:54,999 INFO L225 Difference]: With dead ends: 84 [2020-10-20 05:59:54,999 INFO L226 Difference]: Without dead ends: 81 [2020-10-20 05:59:54,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:59:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-20 05:59:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2020-10-20 05:59:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 05:59:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-20 05:59:55,005 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2020-10-20 05:59:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:55,005 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-20 05:59:55,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 05:59:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-20 05:59:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-20 05:59:55,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:55,007 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:55,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:55,208 INFO L429 AbstractCegarLoop]: === Iteration 14 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:55,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:55,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2020-10-20 05:59:55,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:55,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499220619] [2020-10-20 05:59:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:55,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:55,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-20 05:59:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-20 05:59:55,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499220619] [2020-10-20 05:59:55,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618817581] [2020-10-20 05:59:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:59:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 05:59:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-20 05:59:55,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:55,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-20 05:59:55,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707140648] [2020-10-20 05:59:55,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 05:59:55,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:55,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 05:59:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:59:55,601 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 15 states. [2020-10-20 05:59:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:56,021 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-20 05:59:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:59:56,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-20 05:59:56,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:56,023 INFO L225 Difference]: With dead ends: 72 [2020-10-20 05:59:56,023 INFO L226 Difference]: Without dead ends: 69 [2020-10-20 05:59:56,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-20 05:59:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-20 05:59:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-20 05:59:56,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 05:59:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2020-10-20 05:59:56,028 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2020-10-20 05:59:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:56,028 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2020-10-20 05:59:56,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 05:59:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2020-10-20 05:59:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-20 05:59:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:56,030 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:56,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-20 05:59:56,240 INFO L429 AbstractCegarLoop]: === Iteration 15 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2020-10-20 05:59:56,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:56,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953608866] [2020-10-20 05:59:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:56,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:56,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:56,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-20 05:59:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-20 05:59:56,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953608866] [2020-10-20 05:59:56,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269110697] [2020-10-20 05:59:56,527 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 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 05:59:56,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 05:59:56,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:59:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 05:59:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-20 05:59:56,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:56,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2020-10-20 05:59:56,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715838223] [2020-10-20 05:59:56,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 05:59:56,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 05:59:56,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-20 05:59:56,744 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 17 states. [2020-10-20 05:59:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:57,220 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-10-20 05:59:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 05:59:57,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-20 05:59:57,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:57,222 INFO L225 Difference]: With dead ends: 77 [2020-10-20 05:59:57,222 INFO L226 Difference]: Without dead ends: 74 [2020-10-20 05:59:57,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2020-10-20 05:59:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-20 05:59:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-20 05:59:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 05:59:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-20 05:59:57,231 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2020-10-20 05:59:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:57,232 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-20 05:59:57,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 05:59:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-20 05:59:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-20 05:59:57,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:57,234 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:57,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-20 05:59:57,441 INFO L429 AbstractCegarLoop]: === Iteration 16 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2020-10-20 05:59:57,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:57,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992880274] [2020-10-20 05:59:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:57,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:57,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-20 05:59:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-20 05:59:57,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992880274] [2020-10-20 05:59:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378191758] [2020-10-20 05:59:57,767 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:57,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 05:59:57,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:59:57,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 05:59:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:57,866 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_26|]} [2020-10-20 05:59:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:59:57,889 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 05:59:57,889 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:57,902 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:59:57,907 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-20 05:59:57,908 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:57,916 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:57,916 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:59:57,917 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-10-20 05:59:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2020-10-20 05:59:58,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:59:58,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2020-10-20 05:59:58,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020817715] [2020-10-20 05:59:58,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 05:59:58,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:58,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 05:59:58,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-20 05:59:58,243 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 16 states. [2020-10-20 05:59:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:58,907 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-20 05:59:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 05:59:58,907 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-10-20 05:59:58,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:58,908 INFO L225 Difference]: With dead ends: 87 [2020-10-20 05:59:58,908 INFO L226 Difference]: Without dead ends: 84 [2020-10-20 05:59:58,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-10-20 05:59:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-20 05:59:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2020-10-20 05:59:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-20 05:59:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-20 05:59:58,913 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2020-10-20 05:59:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:58,914 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-20 05:59:58,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 05:59:58,914 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-20 05:59:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-20 05:59:58,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:58,915 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:59,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-20 05:59:59,126 INFO L429 AbstractCegarLoop]: === Iteration 17 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2020-10-20 05:59:59,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:59,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893819879] [2020-10-20 05:59:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:59,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:59,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-20 05:59:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2020-10-20 05:59:59,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893819879] [2020-10-20 05:59:59,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744726994] [2020-10-20 05:59:59,259 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:59:59,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 05:59:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:59:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 05:59:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:59:59,303 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_27|]} [2020-10-20 05:59:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:59:59,307 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 05:59:59,308 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:59,315 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:59:59,331 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-20 05:59:59,332 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 05:59:59,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:59:59,338 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 05:59:59,339 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-20 05:59:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-20 05:59:59,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 05:59:59,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2020-10-20 05:59:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900402109] [2020-10-20 05:59:59,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:59:59,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:59:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:59:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:59:59,557 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 5 states. [2020-10-20 05:59:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:59:59,607 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-10-20 05:59:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:59:59,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2020-10-20 05:59:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:59:59,608 INFO L225 Difference]: With dead ends: 79 [2020-10-20 05:59:59,609 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 05:59:59,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:59:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 05:59:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-20 05:59:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-20 05:59:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-20 05:59:59,613 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2020-10-20 05:59:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:59:59,614 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-20 05:59:59,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:59:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-20 05:59:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-20 05:59:59,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:59:59,615 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:59:59,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-20 05:59:59,817 INFO L429 AbstractCegarLoop]: === Iteration 18 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:59:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:59:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2020-10-20 05:59:59,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:59:59,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752375570] [2020-10-20 05:59:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:59:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:59,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:59:59,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:59:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 05:59:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:00,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-20 06:00:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-20 06:00:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752375570] [2020-10-20 06:00:00,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35974029] [2020-10-20 06:00:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:00,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 06:00:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-20 06:00:00,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:00:00,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-10-20 06:00:00,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002036037] [2020-10-20 06:00:00,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 06:00:00,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 06:00:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-20 06:00:00,488 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 21 states. [2020-10-20 06:00:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:01,081 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-10-20 06:00:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 06:00:01,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-10-20 06:00:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:01,082 INFO L225 Difference]: With dead ends: 90 [2020-10-20 06:00:01,082 INFO L226 Difference]: Without dead ends: 87 [2020-10-20 06:00:01,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-10-20 06:00:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-20 06:00:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-20 06:00:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-20 06:00:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-20 06:00:01,087 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2020-10-20 06:00:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:01,088 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-20 06:00:01,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 06:00:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-20 06:00:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-20 06:00:01,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:01,089 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:01,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-20 06:00:01,290 INFO L429 AbstractCegarLoop]: === Iteration 19 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:01,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2020-10-20 06:00:01,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:01,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297589167] [2020-10-20 06:00:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:01,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:01,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:01,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-20 06:00:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2020-10-20 06:00:01,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297589167] [2020-10-20 06:00:01,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599581100] [2020-10-20 06:00:01,692 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:01,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 06:00:01,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:00:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 06:00:01,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:01,798 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-20 06:00:01,799 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-10-20 06:00:01,800 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:00:01,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:00:01,808 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-20 06:00:01,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-20 06:00:02,020 INFO L350 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2020-10-20 06:00:02,021 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 29 [2020-10-20 06:00:02,022 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:00:02,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:00:02,029 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-20 06:00:02,029 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2020-10-20 06:00:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-20 06:00:02,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:00:02,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2020-10-20 06:00:02,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310812125] [2020-10-20 06:00:02,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:00:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:00:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-20 06:00:02,276 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 6 states. [2020-10-20 06:00:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:02,387 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-20 06:00:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:00:02,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-10-20 06:00:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:02,389 INFO L225 Difference]: With dead ends: 82 [2020-10-20 06:00:02,389 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 06:00:02,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-20 06:00:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 06:00:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-10-20 06:00:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-20 06:00:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2020-10-20 06:00:02,394 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2020-10-20 06:00:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:02,395 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2020-10-20 06:00:02,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:00:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2020-10-20 06:00:02,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-20 06:00:02,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:02,398 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:02,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:02,599 INFO L429 AbstractCegarLoop]: === Iteration 20 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:02,600 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2020-10-20 06:00:02,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:02,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472710888] [2020-10-20 06:00:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:02,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:02,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:02,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-20 06:00:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-20 06:00:02,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472710888] [2020-10-20 06:00:02,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406921995] [2020-10-20 06:00:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 06:00:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-20 06:00:03,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:00:03,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-20 06:00:03,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550064443] [2020-10-20 06:00:03,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-20 06:00:03,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:03,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 06:00:03,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-20 06:00:03,277 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 23 states. [2020-10-20 06:00:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:03,910 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2020-10-20 06:00:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 06:00:03,911 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-10-20 06:00:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:03,912 INFO L225 Difference]: With dead ends: 88 [2020-10-20 06:00:03,912 INFO L226 Difference]: Without dead ends: 85 [2020-10-20 06:00:03,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 06:00:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-20 06:00:03,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-10-20 06:00:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-20 06:00:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-20 06:00:03,917 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2020-10-20 06:00:03,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:03,917 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-20 06:00:03,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-20 06:00:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-20 06:00:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-20 06:00:03,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:03,920 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:04,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:04,131 INFO L429 AbstractCegarLoop]: === Iteration 21 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2020-10-20 06:00:04,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:04,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225185917] [2020-10-20 06:00:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:04,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:04,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:04,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-20 06:00:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-20 06:00:04,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225185917] [2020-10-20 06:00:04,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266612004] [2020-10-20 06:00:04,565 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:04,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 06:00:04,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:00:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 06:00:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-20 06:00:04,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:00:04,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2020-10-20 06:00:04,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283058973] [2020-10-20 06:00:04,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-20 06:00:04,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:04,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-20 06:00:04,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-10-20 06:00:04,913 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 25 states. [2020-10-20 06:00:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:05,635 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-10-20 06:00:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 06:00:05,635 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2020-10-20 06:00:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:05,636 INFO L225 Difference]: With dead ends: 93 [2020-10-20 06:00:05,636 INFO L226 Difference]: Without dead ends: 90 [2020-10-20 06:00:05,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2020-10-20 06:00:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-20 06:00:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-20 06:00:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-20 06:00:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-10-20 06:00:05,641 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2020-10-20 06:00:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:05,642 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-10-20 06:00:05,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-20 06:00:05,642 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-10-20 06:00:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-20 06:00:05,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:05,644 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:05,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-20 06:00:05,855 INFO L429 AbstractCegarLoop]: === Iteration 22 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2020-10-20 06:00:05,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:05,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419466123] [2020-10-20 06:00:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:05,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:05,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:06,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-20 06:00:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-20 06:00:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419466123] [2020-10-20 06:00:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421714673] [2020-10-20 06:00:06,354 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:06,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 06:00:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:00:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 06:00:06,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2020-10-20 06:00:06,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:00:06,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2020-10-20 06:00:06,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409381445] [2020-10-20 06:00:06,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 06:00:06,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 06:00:06,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-10-20 06:00:06,608 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-10-20 06:00:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:07,414 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2020-10-20 06:00:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 06:00:07,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-10-20 06:00:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:07,417 INFO L225 Difference]: With dead ends: 109 [2020-10-20 06:00:07,417 INFO L226 Difference]: Without dead ends: 106 [2020-10-20 06:00:07,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-10-20 06:00:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-20 06:00:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2020-10-20 06:00:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-20 06:00:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-20 06:00:07,422 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2020-10-20 06:00:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:07,422 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-20 06:00:07,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 06:00:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-20 06:00:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-20 06:00:07,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:07,424 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:07,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:07,635 INFO L429 AbstractCegarLoop]: === Iteration 23 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:07,636 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2020-10-20 06:00:07,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:07,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258785155] [2020-10-20 06:00:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:07,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:07,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:08,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-20 06:00:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-20 06:00:08,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258785155] [2020-10-20 06:00:08,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428289393] [2020-10-20 06:00:08,244 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:08,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 06:00:08,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:00:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 06:00:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-10-20 06:00:08,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:00:08,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2020-10-20 06:00:08,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255002835] [2020-10-20 06:00:08,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-20 06:00:08,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-20 06:00:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2020-10-20 06:00:08,756 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 29 states. [2020-10-20 06:00:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:09,694 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-10-20 06:00:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 06:00:09,695 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 150 [2020-10-20 06:00:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:09,697 INFO L225 Difference]: With dead ends: 107 [2020-10-20 06:00:09,697 INFO L226 Difference]: Without dead ends: 104 [2020-10-20 06:00:09,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-20 06:00:09,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-20 06:00:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2020-10-20 06:00:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-20 06:00:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-10-20 06:00:09,703 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2020-10-20 06:00:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:09,703 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-10-20 06:00:09,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-20 06:00:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-10-20 06:00:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-20 06:00:09,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:09,705 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:09,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-20 06:00:09,906 INFO L429 AbstractCegarLoop]: === Iteration 24 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2020-10-20 06:00:09,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:09,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497224079] [2020-10-20 06:00:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:09,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:09,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:10,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-20 06:00:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-10-20 06:00:10,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497224079] [2020-10-20 06:00:10,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432011893] [2020-10-20 06:00:10,450 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:10,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-20 06:00:10,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:00:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 06:00:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2020-10-20 06:00:11,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:00:11,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2020-10-20 06:00:11,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611000550] [2020-10-20 06:00:11,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-20 06:00:11,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-20 06:00:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2020-10-20 06:00:11,029 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 31 states. [2020-10-20 06:00:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:12,057 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-20 06:00:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 06:00:12,058 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 160 [2020-10-20 06:00:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:12,059 INFO L225 Difference]: With dead ends: 112 [2020-10-20 06:00:12,059 INFO L226 Difference]: Without dead ends: 109 [2020-10-20 06:00:12,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2020-10-20 06:00:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-20 06:00:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-10-20 06:00:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-20 06:00:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-20 06:00:12,063 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2020-10-20 06:00:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:12,064 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-20 06:00:12,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-20 06:00:12,064 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-20 06:00:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-20 06:00:12,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:00:12,065 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:00:12,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-20 06:00:12,273 INFO L429 AbstractCegarLoop]: === Iteration 25 === [fooErr1REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 06:00:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:00:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2020-10-20 06:00:12,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:00:12,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633745262] [2020-10-20 06:00:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:00:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:00:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:12,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-20 06:00:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-20 06:00:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:00:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-20 06:00:12,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633745262] [2020-10-20 06:00:12,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343191558] [2020-10-20 06:00:12,948 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:00:12,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-20 06:00:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 06:00:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:00:13,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:00:13,004 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_30|]} [2020-10-20 06:00:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 06:00:13,008 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-20 06:00:13,008 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:00:13,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:00:13,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 06:00:13,024 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-10-20 06:00:13,025 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 06:00:13,033 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:00:13,034 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 06:00:13,034 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-10-20 06:00:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2020-10-20 06:00:13,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:00:13,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2020-10-20 06:00:13,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967679212] [2020-10-20 06:00:13,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 06:00:13,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:00:13,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 06:00:13,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-20 06:00:13,533 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 7 states. [2020-10-20 06:00:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:00:13,606 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2020-10-20 06:00:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 06:00:13,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-10-20 06:00:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:00:13,608 INFO L225 Difference]: With dead ends: 103 [2020-10-20 06:00:13,608 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:00:13,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-20 06:00:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:00:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:00:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:00:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:00:13,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2020-10-20 06:00:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:00:13,610 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:00:13,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 06:00:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:00:13,611 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:00:13,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-20 06:00:13,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:00:13 BoogieIcfgContainer [2020-10-20 06:00:13,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:00:13,816 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:00:13,816 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:00:13,817 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:00:13,817 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:59:48" (3/4) ... [2020-10-20 06:00:13,820 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:00:13,827 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-20 06:00:13,827 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2020-10-20 06:00:13,828 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-20 06:00:13,833 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-20 06:00:13,834 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-10-20 06:00:13,834 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-10-20 06:00:13,834 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:00:13,870 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:00:13,871 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:00:13,872 INFO L168 Benchmark]: Toolchain (without parser) took 26167.66 ms. Allocated memory was 35.1 MB in the beginning and 145.8 MB in the end (delta: 110.6 MB). Free memory was 14.9 MB in the beginning and 118.9 MB in the end (delta: -103.9 MB). Peak memory consumption was 6.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:00:13,873 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 33.6 MB. Free memory was 9.5 MB in the beginning and 9.5 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:00:13,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.18 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 14.0 MB in the beginning and 25.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:00:13,873 INFO L168 Benchmark]: Boogie Preprocessor took 57.61 ms. Allocated memory is still 43.5 MB. Free memory was 25.3 MB in the beginning and 23.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:00:13,876 INFO L168 Benchmark]: RCFGBuilder took 368.63 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 23.4 MB in the beginning and 18.1 MB in the end (delta: 5.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:00:13,876 INFO L168 Benchmark]: TraceAbstraction took 25280.66 ms. Allocated memory was 45.1 MB in the beginning and 145.8 MB in the end (delta: 100.7 MB). Free memory was 17.6 MB in the beginning and 121.2 MB in the end (delta: -103.6 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:00:13,877 INFO L168 Benchmark]: Witness Printer took 54.38 ms. Allocated memory is still 145.8 MB. Free memory was 121.2 MB in the beginning and 118.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:00:13,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 33.6 MB. Free memory was 9.5 MB in the beginning and 9.5 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 395.18 ms. Allocated memory was 35.1 MB in the beginning and 43.5 MB in the end (delta: 8.4 MB). Free memory was 14.0 MB in the beginning and 25.3 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 57.61 ms. Allocated memory is still 43.5 MB. Free memory was 25.3 MB in the beginning and 23.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 368.63 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 23.4 MB in the beginning and 18.1 MB in the end (delta: 5.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 25280.66 ms. Allocated memory was 45.1 MB in the beginning and 145.8 MB in the end (delta: 100.7 MB). Free memory was 17.6 MB in the beginning and 121.2 MB in the end (delta: -103.6 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 54.38 ms. Allocated memory is still 145.8 MB. Free memory was 121.2 MB in the beginning and 118.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.1s, OverallIterations: 25, TraceHistogramMax: 26, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 617 SDtfs, 1841 SDslu, 3160 SDs, 0 SdLazy, 3438 SolverSat, 273 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1988 GetRequests, 1548 SyntacticMatches, 14 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 2350632 SizeOfPredicates, 32 NumberOfNonLiveVariables, 3223 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10777/18637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...