./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/20051113-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/20051113-1.i -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 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:29:28,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:29:28,482 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:29:28,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:29:28,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:29:28,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:29:28,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:29:28,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:29:28,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:29:28,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:29:28,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:29:28,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:29:28,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:29:28,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:29:28,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:29:28,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:29:28,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:29:28,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:29:28,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:29:28,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:29:28,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:29:28,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:29:28,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:29:28,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:29:28,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:29:28,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:29:28,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:29:28,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:29:28,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:29:28,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:29:28,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:29:28,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:29:28,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:29:28,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:29:28,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:29:28,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:29:28,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:29:28,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:29:28,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:29:28,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:29:28,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:29:28,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:29:28,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:29:28,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:29:28,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:29:28,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:29:28,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:29:28,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:29:28,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:29:28,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:29:28,600 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:29:28,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:29:28,601 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:29:28,601 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:29:28,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:29:28,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:29:28,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:29:28,602 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:29:28,602 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:29:28,602 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:29:28,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:29:28,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:29:28,603 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:29:28,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:29:28,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:29:28,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:29:28,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:29:28,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:29:28,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:29:28,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:29:28,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:29:28,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:29:28,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:29:28,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 [2021-12-22 16:29:28,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:29:28,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:29:28,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:29:28,880 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:29:28,881 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:29:28,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20051113-1.i [2021-12-22 16:29:28,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f574fb0a/e5d9c8fc84024aa3a389aaa1bc82def7/FLAG118dfa956 [2021-12-22 16:29:29,423 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:29:29,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20051113-1.i [2021-12-22 16:29:29,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f574fb0a/e5d9c8fc84024aa3a389aaa1bc82def7/FLAG118dfa956 [2021-12-22 16:29:29,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f574fb0a/e5d9c8fc84024aa3a389aaa1bc82def7 [2021-12-22 16:29:29,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:29:29,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:29:29,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:29:29,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:29:29,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:29:29,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:29:29" (1/1) ... [2021-12-22 16:29:29,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb63034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:29, skipping insertion in model container [2021-12-22 16:29:29,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:29:29" (1/1) ... [2021-12-22 16:29:29,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:29:30,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:29:30,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:29:30,297 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:29:30,342 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:29:30,368 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:29:30,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30 WrapperNode [2021-12-22 16:29:30,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:29:30,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:29:30,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:29:30,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:29:30,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,411 INFO L137 Inliner]: procedures = 125, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2021-12-22 16:29:30,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:29:30,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:29:30,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:29:30,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:29:30,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:29:30,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:29:30,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:29:30,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:29:30,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (1/1) ... [2021-12-22 16:29:30,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:29:30,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:30,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 16:29:30,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 16:29:30,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:29:30,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:29:30,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:29:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:29:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure dummy_abort [2021-12-22 16:29:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure dummy_abort [2021-12-22 16:29:30,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:29:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:29:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:29:30,635 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:29:30,637 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:29:30,927 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:29:30,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:29:30,932 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 16:29:30,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:29:30 BoogieIcfgContainer [2021-12-22 16:29:30,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:29:30,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:29:30,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:29:30,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:29:30,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:29:29" (1/3) ... [2021-12-22 16:29:30,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbbcf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:29:30, skipping insertion in model container [2021-12-22 16:29:30,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:29:30" (2/3) ... [2021-12-22 16:29:30,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fbbcf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:29:30, skipping insertion in model container [2021-12-22 16:29:30,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:29:30" (3/3) ... [2021-12-22 16:29:30,941 INFO L111 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2021-12-22 16:29:30,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:29:30,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-22 16:29:31,003 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:29:31,012 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 16:29:31,012 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-22 16:29:31,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 16:29:31,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:31,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 16:29:31,042 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash 30849, now seen corresponding path program 1 times [2021-12-22 16:29:31,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:31,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500151644] [2021-12-22 16:29:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:31,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:31,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500151644] [2021-12-22 16:29:31,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500151644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:31,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:31,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:29:31,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981027898] [2021-12-22 16:29:31,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:31,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:29:31,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:29:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:31,283 INFO L87 Difference]: Start difference. First operand has 64 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:31,369 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-12-22 16:29:31,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 16:29:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:31,378 INFO L225 Difference]: With dead ends: 63 [2021-12-22 16:29:31,378 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 16:29:31,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:31,384 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:31,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 40 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 16:29:31,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-22 16:29:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-12-22 16:29:31,420 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 3 [2021-12-22 16:29:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:31,422 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-12-22 16:29:31,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-12-22 16:29:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 16:29:31,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:31,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 16:29:31,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:29:31,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash 956356, now seen corresponding path program 1 times [2021-12-22 16:29:31,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:31,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127563652] [2021-12-22 16:29:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:31,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:31,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127563652] [2021-12-22 16:29:31,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127563652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:31,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:31,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:29:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371492666] [2021-12-22 16:29:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:29:31,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:29:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:31,520 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:31,576 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-22 16:29:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-22 16:29:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:31,578 INFO L225 Difference]: With dead ends: 60 [2021-12-22 16:29:31,579 INFO L226 Difference]: Without dead ends: 60 [2021-12-22 16:29:31,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:31,581 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:31,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 39 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-22 16:29:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-22 16:29:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-12-22 16:29:31,591 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 4 [2021-12-22 16:29:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:31,592 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-12-22 16:29:31,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-12-22 16:29:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:29:31,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:31,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:31,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:29:31,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1573926710, now seen corresponding path program 1 times [2021-12-22 16:29:31,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023115749] [2021-12-22 16:29:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:31,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:31,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:31,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023115749] [2021-12-22 16:29:31,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023115749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:31,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:31,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:29:31,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538439103] [2021-12-22 16:29:31,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:31,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:29:31,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:29:31,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:31,679 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:31,769 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-12-22 16:29:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:29:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:31,771 INFO L225 Difference]: With dead ends: 53 [2021-12-22 16:29:31,771 INFO L226 Difference]: Without dead ends: 53 [2021-12-22 16:29:31,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:31,773 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:31,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 32 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-22 16:29:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-22 16:29:31,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-12-22 16:29:31,795 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 7 [2021-12-22 16:29:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:31,796 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-12-22 16:29:31,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-12-22 16:29:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:29:31,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:31,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:31,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:29:31,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1573926709, now seen corresponding path program 1 times [2021-12-22 16:29:31,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272739331] [2021-12-22 16:29:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:31,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:31,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:31,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272739331] [2021-12-22 16:29:31,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272739331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:31,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:31,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:29:31,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6394226] [2021-12-22 16:29:31,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:31,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:29:31,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:29:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:31,839 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:31,875 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-12-22 16:29:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:29:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:29:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:31,876 INFO L225 Difference]: With dead ends: 46 [2021-12-22 16:29:31,876 INFO L226 Difference]: Without dead ends: 46 [2021-12-22 16:29:31,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:29:31,878 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:31,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-22 16:29:31,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-22 16:29:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 44 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-22 16:29:31,882 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 7 [2021-12-22 16:29:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:31,883 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-22 16:29:31,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-22 16:29:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:29:31,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:31,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:31,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:29:31,884 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:31,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1365553495, now seen corresponding path program 1 times [2021-12-22 16:29:31,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:31,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149002985] [2021-12-22 16:29:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:31,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:31,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:31,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149002985] [2021-12-22 16:29:31,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149002985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:31,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:31,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:29:31,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877461255] [2021-12-22 16:29:31,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:31,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:29:31,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:29:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:29:31,950 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:32,009 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-22 16:29:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-22 16:29:32,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:32,010 INFO L225 Difference]: With dead ends: 44 [2021-12-22 16:29:32,010 INFO L226 Difference]: Without dead ends: 44 [2021-12-22 16:29:32,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:29:32,012 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:32,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 35 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-22 16:29:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-22 16:29:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 42 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-12-22 16:29:32,017 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 15 [2021-12-22 16:29:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:32,017 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-12-22 16:29:32,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-12-22 16:29:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:29:32,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:32,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:32,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:29:32,019 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1365553496, now seen corresponding path program 1 times [2021-12-22 16:29:32,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145342121] [2021-12-22 16:29:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:32,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:32,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145342121] [2021-12-22 16:29:32,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145342121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:32,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:32,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:29:32,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484310209] [2021-12-22 16:29:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:32,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:32,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:29:32,095 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:32,136 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-12-22 16:29:32,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:32,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-22 16:29:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:32,137 INFO L225 Difference]: With dead ends: 43 [2021-12-22 16:29:32,138 INFO L226 Difference]: Without dead ends: 43 [2021-12-22 16:29:32,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:32,139 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:32,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-22 16:29:32,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-22 16:29:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-12-22 16:29:32,143 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 15 [2021-12-22 16:29:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:32,144 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-12-22 16:29:32,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-12-22 16:29:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:29:32,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:32,145 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:32,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 16:29:32,145 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1963083303, now seen corresponding path program 1 times [2021-12-22 16:29:32,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:32,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662282205] [2021-12-22 16:29:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:32,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:32,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662282205] [2021-12-22 16:29:32,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662282205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:32,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:32,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:29:32,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351654060] [2021-12-22 16:29:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:32,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:32,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:29:32,212 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:32,272 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-12-22 16:29:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:32,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 16:29:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:32,274 INFO L225 Difference]: With dead ends: 69 [2021-12-22 16:29:32,274 INFO L226 Difference]: Without dead ends: 69 [2021-12-22 16:29:32,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:32,275 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:32,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 54 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-22 16:29:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2021-12-22 16:29:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 44 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-12-22 16:29:32,281 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 17 [2021-12-22 16:29:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:32,281 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-12-22 16:29:32,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-12-22 16:29:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 16:29:32,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:32,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:32,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 16:29:32,283 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash -58695891, now seen corresponding path program 1 times [2021-12-22 16:29:32,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:32,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145550078] [2021-12-22 16:29:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:32,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:32,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145550078] [2021-12-22 16:29:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145550078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:32,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:32,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:29:32,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88488720] [2021-12-22 16:29:32,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:32,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:29:32,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:29:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:32,342 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:32,399 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-22 16:29:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 16:29:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 16:29:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:32,400 INFO L225 Difference]: With dead ends: 44 [2021-12-22 16:29:32,401 INFO L226 Difference]: Without dead ends: 44 [2021-12-22 16:29:32,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:29:32,402 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:32,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-22 16:29:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-22 16:29:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 42 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-22 16:29:32,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2021-12-22 16:29:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:32,423 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-22 16:29:32,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-22 16:29:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 16:29:32,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:32,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:32,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 16:29:32,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash -58695890, now seen corresponding path program 1 times [2021-12-22 16:29:32,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:32,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906345464] [2021-12-22 16:29:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:32,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:32,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906345464] [2021-12-22 16:29:32,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906345464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:32,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:32,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:29:32,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900741712] [2021-12-22 16:29:32,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:32,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:29:32,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:29:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:32,476 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:32,503 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-12-22 16:29:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 16:29:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:32,504 INFO L225 Difference]: With dead ends: 64 [2021-12-22 16:29:32,504 INFO L226 Difference]: Without dead ends: 64 [2021-12-22 16:29:32,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:29:32,505 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:32,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 171 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-22 16:29:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2021-12-22 16:29:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.225) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-12-22 16:29:32,509 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 21 [2021-12-22 16:29:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:32,509 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-12-22 16:29:32,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-12-22 16:29:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 16:29:32,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:32,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:32,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 16:29:32,510 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:32,511 INFO L85 PathProgramCache]: Analyzing trace with hash -309999949, now seen corresponding path program 1 times [2021-12-22 16:29:32,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:32,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061614699] [2021-12-22 16:29:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:32,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:32,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061614699] [2021-12-22 16:29:32,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061614699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362339921] [2021-12-22 16:29:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:32,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:32,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:32,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:32,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:29:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:29:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:32,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:33,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:29:33,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-22 16:29:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:33,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362339921] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:33,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:33,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2021-12-22 16:29:33,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404535179] [2021-12-22 16:29:33,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:33,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 16:29:33,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 16:29:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:29:33,270 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:33,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:33,545 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2021-12-22 16:29:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 16:29:33,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 16:29:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:33,547 INFO L225 Difference]: With dead ends: 111 [2021-12-22 16:29:33,547 INFO L226 Difference]: Without dead ends: 111 [2021-12-22 16:29:33,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:29:33,548 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 422 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:33,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 148 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:29:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-22 16:29:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 57. [2021-12-22 16:29:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-12-22 16:29:33,552 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 22 [2021-12-22 16:29:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:33,552 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-12-22 16:29:33,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-12-22 16:29:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 16:29:33,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:33,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:33,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:33,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 16:29:33,771 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -612311662, now seen corresponding path program 1 times [2021-12-22 16:29:33,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776104156] [2021-12-22 16:29:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:33,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:33,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 16:29:33,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:33,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776104156] [2021-12-22 16:29:33,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776104156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:33,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:33,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:29:33,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24781333] [2021-12-22 16:29:33,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:33,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:33,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:29:33,861 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:33,905 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-12-22 16:29:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-22 16:29:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:33,907 INFO L225 Difference]: With dead ends: 56 [2021-12-22 16:29:33,907 INFO L226 Difference]: Without dead ends: 56 [2021-12-22 16:29:33,907 INFO L932 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 [2021-12-22 16:29:33,908 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:33,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 44 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:33,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-22 16:29:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-22 16:29:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.2) internal successors, (60), 54 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-12-22 16:29:33,914 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 24 [2021-12-22 16:29:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:33,914 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-12-22 16:29:33,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-12-22 16:29:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:29:33,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:33,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:33,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 16:29:33,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash -20987021, now seen corresponding path program 1 times [2021-12-22 16:29:33,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:33,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463864535] [2021-12-22 16:29:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:33,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 16:29:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:34,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:34,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463864535] [2021-12-22 16:29:34,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463864535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:34,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:34,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:29:34,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556785851] [2021-12-22 16:29:34,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:34,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:34,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:29:34,014 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:34,069 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-12-22 16:29:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-12-22 16:29:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:34,070 INFO L225 Difference]: With dead ends: 68 [2021-12-22 16:29:34,070 INFO L226 Difference]: Without dead ends: 68 [2021-12-22 16:29:34,070 INFO L932 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 [2021-12-22 16:29:34,071 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:34,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:34,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-22 16:29:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-12-22 16:29:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-12-22 16:29:34,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 26 [2021-12-22 16:29:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:34,077 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-12-22 16:29:34,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-12-22 16:29:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:29:34,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:34,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:34,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 16:29:34,082 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:34,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1184799620, now seen corresponding path program 1 times [2021-12-22 16:29:34,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:34,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419803710] [2021-12-22 16:29:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:34,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 16:29:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:34,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:34,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419803710] [2021-12-22 16:29:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419803710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:34,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:34,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:29:34,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765765368] [2021-12-22 16:29:34,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:29:34,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:29:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:34,132 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:34,156 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-12-22 16:29:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 16:29:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:34,158 INFO L225 Difference]: With dead ends: 67 [2021-12-22 16:29:34,159 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 16:29:34,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:29:34,160 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:34,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 169 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 16:29:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-12-22 16:29:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-12-22 16:29:34,163 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 30 [2021-12-22 16:29:34,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:34,163 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-12-22 16:29:34,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-12-22 16:29:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:29:34,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:34,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:34,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 16:29:34,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -416344648, now seen corresponding path program 1 times [2021-12-22 16:29:34,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:34,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726758795] [2021-12-22 16:29:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:34,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 16:29:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:34,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:34,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726758795] [2021-12-22 16:29:34,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726758795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:34,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:34,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:29:34,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143576682] [2021-12-22 16:29:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:34,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:29:34,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:29:34,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:29:34,277 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:34,398 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-12-22 16:29:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:29:34,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-12-22 16:29:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:34,399 INFO L225 Difference]: With dead ends: 73 [2021-12-22 16:29:34,399 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 16:29:34,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:29:34,400 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:34,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 175 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 16:29:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2021-12-22 16:29:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:29:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-12-22 16:29:34,404 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 31 [2021-12-22 16:29:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:34,404 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-12-22 16:29:34,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:29:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-12-22 16:29:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 16:29:34,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:34,405 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:34,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 16:29:34,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash 241915192, now seen corresponding path program 1 times [2021-12-22 16:29:34,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:34,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012553364] [2021-12-22 16:29:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:34,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 16:29:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 16:29:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 16:29:34,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012553364] [2021-12-22 16:29:34,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012553364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:34,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:29:34,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:29:34,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926502529] [2021-12-22 16:29:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:29:34,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:29:34,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:29:34,490 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:34,541 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-12-22 16:29:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:29:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-22 16:29:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:34,542 INFO L225 Difference]: With dead ends: 65 [2021-12-22 16:29:34,542 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 16:29:34,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:29:34,543 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:34,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 16:29:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-22 16:29:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-12-22 16:29:34,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 33 [2021-12-22 16:29:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-12-22 16:29:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-12-22 16:29:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 16:29:34,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:34,546 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:34,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 16:29:34,547 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:34,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash 701429363, now seen corresponding path program 2 times [2021-12-22 16:29:34,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:34,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251646843] [2021-12-22 16:29:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:34,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:29:34,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:34,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251646843] [2021-12-22 16:29:34,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251646843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:34,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328902649] [2021-12-22 16:29:34,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:34,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:34,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:34,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:34,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:29:34,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-22 16:29:34,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:34,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:29:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 16:29:34,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:29:34,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328902649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:29:34,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:29:34,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-22 16:29:34,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382104936] [2021-12-22 16:29:34,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:29:34,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:29:34,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:29:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:29:34,784 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:34,794 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-12-22 16:29:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:29:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-22 16:29:34,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:34,795 INFO L225 Difference]: With dead ends: 57 [2021-12-22 16:29:34,795 INFO L226 Difference]: Without dead ends: 57 [2021-12-22 16:29:34,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:29:34,796 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:34,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 81 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-22 16:29:34,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-22 16:29:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 55 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-12-22 16:29:34,800 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 32 [2021-12-22 16:29:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:34,800 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-12-22 16:29:34,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-12-22 16:29:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 16:29:34,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:34,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:34,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 16:29:35,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-22 16:29:35,019 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1203352596, now seen corresponding path program 1 times [2021-12-22 16:29:35,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:35,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22775010] [2021-12-22 16:29:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:35,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:35,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:35,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22775010] [2021-12-22 16:29:35,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22775010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:35,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639305294] [2021-12-22 16:29:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:35,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:35,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:35,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:35,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:29:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 16:29:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:35,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:29:35,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:35,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:35,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:35,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:35,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:35,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:35,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:35,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:35,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:35,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-22 16:29:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:35,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:35,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639305294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:35,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:35,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2021-12-22 16:29:35,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020062625] [2021-12-22 16:29:35,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:35,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:29:35,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:35,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:29:35,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:29:35,756 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:36,062 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-12-22 16:29:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:29:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 16:29:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:36,063 INFO L225 Difference]: With dead ends: 97 [2021-12-22 16:29:36,063 INFO L226 Difference]: Without dead ends: 97 [2021-12-22 16:29:36,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:29:36,064 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 123 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:36,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 401 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:29:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-22 16:29:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2021-12-22 16:29:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-22 16:29:36,066 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 33 [2021-12-22 16:29:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-22 16:29:36,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-22 16:29:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 16:29:36,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:36,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:36,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:36,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:36,268 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -149943807, now seen corresponding path program 1 times [2021-12-22 16:29:36,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:36,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687870452] [2021-12-22 16:29:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:36,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 16:29:36,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687870452] [2021-12-22 16:29:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687870452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834097638] [2021-12-22 16:29:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:36,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:36,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:36,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:36,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:29:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 16:29:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 16:29:36,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:36,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:29:36,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-12-22 16:29:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 16:29:36,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834097638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:36,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:36,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2021-12-22 16:29:36,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583529389] [2021-12-22 16:29:36,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:36,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:29:36,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:36,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:29:36,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:29:36,985 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:37,324 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-12-22 16:29:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:29:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 16:29:37,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:37,325 INFO L225 Difference]: With dead ends: 79 [2021-12-22 16:29:37,325 INFO L226 Difference]: Without dead ends: 79 [2021-12-22 16:29:37,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-12-22 16:29:37,326 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 185 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:37,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 126 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-22 16:29:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2021-12-22 16:29:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-12-22 16:29:37,329 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 34 [2021-12-22 16:29:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:37,329 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-12-22 16:29:37,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-12-22 16:29:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 16:29:37,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:37,330 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:37,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:37,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 16:29:37,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1336889422, now seen corresponding path program 1 times [2021-12-22 16:29:37,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:37,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026971397] [2021-12-22 16:29:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:37,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 16:29:37,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:37,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026971397] [2021-12-22 16:29:37,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026971397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:37,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518574204] [2021-12-22 16:29:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:37,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:37,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:37,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:29:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 16:29:37,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:37,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:29:38,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-22 16:29:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:38,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518574204] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:38,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:38,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2021-12-22 16:29:38,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560018233] [2021-12-22 16:29:38,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:38,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 16:29:38,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 16:29:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:29:38,225 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:38,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:38,739 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-12-22 16:29:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 16:29:38,740 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 16:29:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:38,741 INFO L225 Difference]: With dead ends: 65 [2021-12-22 16:29:38,741 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 16:29:38,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 16:29:38,742 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:38,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 219 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:29:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 16:29:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-22 16:29:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-12-22 16:29:38,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 43 [2021-12-22 16:29:38,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:38,745 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-12-22 16:29:38,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-12-22 16:29:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 16:29:38,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:38,746 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:29:38,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:38,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:38,968 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -990509317, now seen corresponding path program 2 times [2021-12-22 16:29:38,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662927468] [2021-12-22 16:29:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:38,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 16:29:39,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:39,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662927468] [2021-12-22 16:29:39,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662927468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:39,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059020666] [2021-12-22 16:29:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:39,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:39,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:39,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:29:39,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:29:39,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 16:29:39,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:39,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:29:39,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-22 16:29:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:39,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:39,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059020666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:39,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:39,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2021-12-22 16:29:39,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571036345] [2021-12-22 16:29:39,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:39,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-22 16:29:39,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-22 16:29:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:29:39,881 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 27 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:40,376 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-12-22 16:29:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 16:29:40,376 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 27 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-22 16:29:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:40,377 INFO L225 Difference]: With dead ends: 67 [2021-12-22 16:29:40,377 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 16:29:40,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-12-22 16:29:40,378 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:40,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 182 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:29:40,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 16:29:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-12-22 16:29:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-12-22 16:29:40,381 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2021-12-22 16:29:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-12-22 16:29:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 27 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-12-22 16:29:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 16:29:40,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:40,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2021-12-22 16:29:40,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 16:29:40,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:40,596 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash 868555041, now seen corresponding path program 2 times [2021-12-22 16:29:40,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:40,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646243202] [2021-12-22 16:29:40,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:40,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:29:40,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646243202] [2021-12-22 16:29:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646243202] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081182585] [2021-12-22 16:29:40,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:29:40,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:40,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:40,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:29:40,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:29:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 16:29:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:40,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:29:40,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:40,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:40,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:40,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:41,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:41,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:41,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:29:41,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-22 16:29:41,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-22 16:29:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 16:29:41,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 16:29:41,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081182585] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:41,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:41,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 23 [2021-12-22 16:29:41,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957587962] [2021-12-22 16:29:41,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:41,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-22 16:29:41,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:41,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-22 16:29:41,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:29:41,455 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:41,896 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-12-22 16:29:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:29:41,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-22 16:29:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:41,897 INFO L225 Difference]: With dead ends: 63 [2021-12-22 16:29:41,897 INFO L226 Difference]: Without dead ends: 63 [2021-12-22 16:29:41,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 16:29:41,898 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:41,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 258 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:29:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-22 16:29:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-22 16:29:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-22 16:29:41,901 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2021-12-22 16:29:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:41,901 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-22 16:29:41,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:41,901 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-22 16:29:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 16:29:41,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:41,902 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-12-22 16:29:41,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:42,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:42,103 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:42,103 INFO L85 PathProgramCache]: Analyzing trace with hash 679832114, now seen corresponding path program 3 times [2021-12-22 16:29:42,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:42,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514122752] [2021-12-22 16:29:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:42,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:42,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:42,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514122752] [2021-12-22 16:29:42,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514122752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:42,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14480127] [2021-12-22 16:29:42,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 16:29:42,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:42,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:42,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:42,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:29:42,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-22 16:29:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:29:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:42,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:42,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14480127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:42,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:42,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-22 16:29:42,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702770965] [2021-12-22 16:29:42,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:42,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 16:29:42,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:42,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 16:29:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:29:42,591 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:42,628 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-12-22 16:29:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:29:42,629 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-22 16:29:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:42,629 INFO L225 Difference]: With dead ends: 66 [2021-12-22 16:29:42,629 INFO L226 Difference]: Without dead ends: 66 [2021-12-22 16:29:42,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:29:42,630 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:42,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:29:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-22 16:29:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-22 16:29:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-12-22 16:29:42,632 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2021-12-22 16:29:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:42,633 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-12-22 16:29:42,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-12-22 16:29:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 16:29:42,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:42,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2021-12-22 16:29:42,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:42,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 16:29:42,834 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -220059533, now seen corresponding path program 4 times [2021-12-22 16:29:42,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293335721] [2021-12-22 16:29:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:42,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:42,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293335721] [2021-12-22 16:29:42,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293335721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725754663] [2021-12-22 16:29:42,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 16:29:42,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:42,953 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:42,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:29:43,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 16:29:43,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:29:43,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:43,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:43,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725754663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:43,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:43,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2021-12-22 16:29:43,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016530745] [2021-12-22 16:29:43,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:43,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:29:43,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:29:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:29:43,638 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:29:43,996 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-12-22 16:29:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:29:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-22 16:29:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:29:43,997 INFO L225 Difference]: With dead ends: 72 [2021-12-22 16:29:43,997 INFO L226 Difference]: Without dead ends: 72 [2021-12-22 16:29:43,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:29:43,998 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:29:43,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 270 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:29:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-22 16:29:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-22 16:29:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:29:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2021-12-22 16:29:44,001 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 61 [2021-12-22 16:29:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:29:44,002 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2021-12-22 16:29:44,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:29:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2021-12-22 16:29:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 16:29:44,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:29:44,002 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2021-12-22 16:29:44,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:29:44,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:44,212 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:29:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:29:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -179470317, now seen corresponding path program 5 times [2021-12-22 16:29:44,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:29:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266028024] [2021-12-22 16:29:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:29:44,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:29:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:29:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:44,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:29:44,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266028024] [2021-12-22 16:29:44,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266028024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:29:44,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005059563] [2021-12-22 16:29:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 16:29:44,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:29:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:29:44,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:29:44,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:29:44,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-22 16:29:44,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:29:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-22 16:29:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:29:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:45,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:29:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:29:45,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005059563] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:29:45,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:29:45,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2021-12-22 16:29:45,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483266978] [2021-12-22 16:29:45,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:29:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-22 16:29:45,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:29:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-22 16:29:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 16:29:45,949 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:03,762 WARN L227 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 70 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-22 16:30:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:30:04,019 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-12-22 16:30:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 16:30:04,019 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-22 16:30:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:30:04,020 INFO L225 Difference]: With dead ends: 84 [2021-12-22 16:30:04,020 INFO L226 Difference]: Without dead ends: 84 [2021-12-22 16:30:04,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=674, Invalid=1582, Unknown=0, NotChecked=0, Total=2256 [2021-12-22 16:30:04,021 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:30:04,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 262 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 16:30:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-22 16:30:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-22 16:30:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:30:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-12-22 16:30:04,023 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 67 [2021-12-22 16:30:04,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:30:04,023 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-12-22 16:30:04,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:30:04,023 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-12-22 16:30:04,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 16:30:04,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:30:04,027 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1] [2021-12-22 16:30:04,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-22 16:30:04,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-22 16:30:04,228 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-12-22 16:30:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:30:04,229 INFO L85 PathProgramCache]: Analyzing trace with hash -595228845, now seen corresponding path program 6 times [2021-12-22 16:30:04,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:30:04,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330950611] [2021-12-22 16:30:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:30:04,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:30:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:30:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:30:04,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:30:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330950611] [2021-12-22 16:30:04,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330950611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:30:04,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894824257] [2021-12-22 16:30:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 16:30:04,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:30:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:30:04,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:30:04,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:30:13,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-22 16:30:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:30:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-22 16:30:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:30:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:30:14,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:30:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-22 16:30:15,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894824257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:30:15,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:30:15,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 72 [2021-12-22 16:30:15,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330252548] [2021-12-22 16:30:15,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:30:15,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-22 16:30:15,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:30:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-22 16:30:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2021-12-22 16:30:15,823 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 72 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 72 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)