./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/verifythis/prefixsum_iter.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:32:47,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:32:47,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:32:47,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:32:47,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:32:47,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:32:47,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:32:47,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:32:47,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:32:47,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:32:47,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:32:47,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:32:47,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:32:47,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:32:47,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:32:47,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:32:47,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:32:47,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:32:47,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:32:47,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:32:47,546 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:32:47,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:32:47,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:32:47,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:32:47,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:32:47,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:32:47,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:32:47,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:32:47,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:32:47,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:32:47,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:32:47,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:32:47,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:32:47,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:32:47,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:32:47,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:32:47,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:32:47,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:32:47,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:32:47,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:32:47,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:32:47,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:32:47,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:32:47,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:32:47,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:32:47,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:32:47,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:32:47,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:32:47,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:32:47,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:32:47,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:32:47,598 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:32:47,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:32:47,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:32:47,599 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:32:47,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:32:47,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:32:47,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:32:47,600 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:32:47,600 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:32:47,600 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:32:47,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:32:47,602 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:32:47,602 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:32:47,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:32:47,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:32:47,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:32:47,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:32:47,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:32:47,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:32:47,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:32:47,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:32:47,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:32:47,604 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-07-20 05:32:47,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:32:47,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:32:47,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:32:47,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:32:47,835 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:32:47,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-07-20 05:32:47,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32dbc912/852101c7f1a644a698dbbc6fef8da49d/FLAG6acebb508 [2022-07-20 05:32:48,277 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:32:48,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-07-20 05:32:48,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32dbc912/852101c7f1a644a698dbbc6fef8da49d/FLAG6acebb508 [2022-07-20 05:32:48,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32dbc912/852101c7f1a644a698dbbc6fef8da49d [2022-07-20 05:32:48,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:32:48,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:32:48,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:32:48,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:32:48,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:32:48,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:48,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a81992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48, skipping insertion in model container [2022-07-20 05:32:48,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:48,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:32:48,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:32:48,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-07-20 05:32:48,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:32:48,912 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:32:48,923 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-07-20 05:32:48,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:32:48,946 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:32:48,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48 WrapperNode [2022-07-20 05:32:48,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:32:48,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:32:48,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:32:48,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:32:48,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:48,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:48,986 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-07-20 05:32:48,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:32:48,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:32:48,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:32:48,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:32:48,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:48,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:32:49,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:32:49,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:32:49,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:32:49,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (1/1) ... [2022-07-20 05:32:49,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:32:49,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:32:49,049 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) [2022-07-20 05:32:49,051 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 [2022-07-20 05:32:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:32:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-20 05:32:49,078 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-20 05:32:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 05:32:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:32:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:32:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:32:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:32:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:32:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-07-20 05:32:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-07-20 05:32:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:32:49,157 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:32:49,158 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:32:49,486 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:32:49,493 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:32:49,493 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-20 05:32:49,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:32:49 BoogieIcfgContainer [2022-07-20 05:32:49,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:32:49,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:32:49,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:32:49,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:32:49,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:32:48" (1/3) ... [2022-07-20 05:32:49,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6090fcff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:32:49, skipping insertion in model container [2022-07-20 05:32:49,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:32:48" (2/3) ... [2022-07-20 05:32:49,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6090fcff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:32:49, skipping insertion in model container [2022-07-20 05:32:49,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:32:49" (3/3) ... [2022-07-20 05:32:49,502 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-07-20 05:32:49,514 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:32:49,515 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-07-20 05:32:49,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:32:49,570 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d6c4759, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4417bc76 [2022-07-20 05:32:49,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-20 05:32:49,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:32:49,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:49,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:49,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1116940539, now seen corresponding path program 1 times [2022-07-20 05:32:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256622578] [2022-07-20 05:32:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:49,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:49,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256622578] [2022-07-20 05:32:49,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256622578] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:49,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:49,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:32:49,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988047334] [2022-07-20 05:32:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:49,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:32:49,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:32:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:49,863 INFO L87 Difference]: Start difference. First operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:49,939 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-07-20 05:32:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:32:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-20 05:32:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:49,949 INFO L225 Difference]: With dead ends: 102 [2022-07-20 05:32:49,950 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 05:32:49,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:32:49,955 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:49,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 195 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:32:49,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 05:32:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-20 05:32:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 93 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2022-07-20 05:32:49,998 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 29 [2022-07-20 05:32:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:49,998 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2022-07-20 05:32:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2022-07-20 05:32:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:32:50,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:50,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:50,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:32:50,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash 236420795, now seen corresponding path program 1 times [2022-07-20 05:32:50,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:50,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194104045] [2022-07-20 05:32:50,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:50,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:50,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:50,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194104045] [2022-07-20 05:32:50,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194104045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:50,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:50,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:32:50,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132500732] [2022-07-20 05:32:50,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:50,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:32:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:50,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:32:50,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:32:50,151 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:50,298 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-07-20 05:32:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:32:50,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-20 05:32:50,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:50,300 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:32:50,300 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:32:50,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:50,302 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 153 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:50,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 158 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:32:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-20 05:32:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 91 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-07-20 05:32:50,310 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 29 [2022-07-20 05:32:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:50,312 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-07-20 05:32:50,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-07-20 05:32:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:32:50,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:50,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:32:50,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:32:50,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:50,314 INFO L85 PathProgramCache]: Analyzing trace with hash 236420796, now seen corresponding path program 1 times [2022-07-20 05:32:50,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:50,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568582300] [2022-07-20 05:32:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:50,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:50,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568582300] [2022-07-20 05:32:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568582300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:50,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:50,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:32:50,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757688268] [2022-07-20 05:32:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:50,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:32:50,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:32:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:32:50,478 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:50,804 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2022-07-20 05:32:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:32:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-20 05:32:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:50,806 INFO L225 Difference]: With dead ends: 173 [2022-07-20 05:32:50,806 INFO L226 Difference]: Without dead ends: 173 [2022-07-20 05:32:50,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:32:50,808 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 395 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:50,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 192 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:32:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-20 05:32:50,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2022-07-20 05:32:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 92 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2022-07-20 05:32:50,833 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 29 [2022-07-20 05:32:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:50,833 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2022-07-20 05:32:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2022-07-20 05:32:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 05:32:50,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:50,834 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 05:32:50,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:32:50,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:50,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889940, now seen corresponding path program 1 times [2022-07-20 05:32:50,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:50,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271781110] [2022-07-20 05:32:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:50,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:50,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271781110] [2022-07-20 05:32:50,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271781110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:50,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:50,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:32:50,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063611230] [2022-07-20 05:32:50,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:50,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:32:50,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:50,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:32:50,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:32:50,935 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:51,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:51,005 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-07-20 05:32:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:32:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-20 05:32:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:51,007 INFO L225 Difference]: With dead ends: 98 [2022-07-20 05:32:51,007 INFO L226 Difference]: Without dead ends: 98 [2022-07-20 05:32:51,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:51,017 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 148 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:51,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 166 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-20 05:32:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-20 05:32:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 1.596774193548387) internal successors, (99), 91 states have internal predecessors, (99), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-07-20 05:32:51,037 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 30 [2022-07-20 05:32:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:51,037 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-07-20 05:32:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-07-20 05:32:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 05:32:51,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:51,040 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 05:32:51,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:32:51,041 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:51,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889939, now seen corresponding path program 1 times [2022-07-20 05:32:51,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:51,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479105796] [2022-07-20 05:32:51,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:51,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479105796] [2022-07-20 05:32:51,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479105796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:51,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:51,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:32:51,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015697882] [2022-07-20 05:32:51,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:51,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:32:51,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:32:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:51,133 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:51,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:51,328 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2022-07-20 05:32:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:32:51,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-20 05:32:51,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:51,330 INFO L225 Difference]: With dead ends: 169 [2022-07-20 05:32:51,330 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 05:32:51,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:51,331 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 241 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:51,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 230 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:32:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 05:32:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 136. [2022-07-20 05:32:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 100 states have (on average 1.66) internal successors, (166), 129 states have internal predecessors, (166), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2022-07-20 05:32:51,343 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 30 [2022-07-20 05:32:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:51,344 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2022-07-20 05:32:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-20 05:32:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2022-07-20 05:32:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:32:51,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:51,346 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 05:32:51,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:32:51,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -535927024, now seen corresponding path program 1 times [2022-07-20 05:32:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177494411] [2022-07-20 05:32:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:51,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177494411] [2022-07-20 05:32:51,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177494411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:51,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:51,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:32:51,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621182979] [2022-07-20 05:32:51,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:51,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:32:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:32:51,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:32:51,435 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:53,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-20 05:32:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:53,791 INFO L93 Difference]: Finished difference Result 303 states and 326 transitions. [2022-07-20 05:32:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:32:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-07-20 05:32:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:53,794 INFO L225 Difference]: With dead ends: 303 [2022-07-20 05:32:53,794 INFO L226 Difference]: Without dead ends: 303 [2022-07-20 05:32:53,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:32:53,794 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 508 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:53,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 477 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 05:32:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-20 05:32:53,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 130. [2022-07-20 05:32:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 94 states have (on average 1.6170212765957446) internal successors, (152), 123 states have internal predecessors, (152), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2022-07-20 05:32:53,801 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 32 [2022-07-20 05:32:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:53,802 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2022-07-20 05:32:53,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-20 05:32:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2022-07-20 05:32:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:32:53,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:53,803 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 05:32:53,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:32:53,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash 566089799, now seen corresponding path program 1 times [2022-07-20 05:32:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:53,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808215759] [2022-07-20 05:32:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:53,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:53,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:53,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:53,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:32:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:53,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808215759] [2022-07-20 05:32:53,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808215759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:53,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:53,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:32:53,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436678181] [2022-07-20 05:32:53,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:53,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:32:53,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:32:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:32:53,862 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:32:53,992 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2022-07-20 05:32:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:32:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-07-20 05:32:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:32:53,993 INFO L225 Difference]: With dead ends: 124 [2022-07-20 05:32:53,994 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 05:32:53,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:32:53,994 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 175 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:32:53,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 172 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:32:53,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 05:32:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-20 05:32:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 117 states have internal predecessors, (140), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 05:32:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2022-07-20 05:32:53,999 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 33 [2022-07-20 05:32:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:32:53,999 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2022-07-20 05:32:53,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2022-07-20 05:32:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:32:54,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:32:54,000 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 05:32:54,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:32:54,000 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:32:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:32:54,001 INFO L85 PathProgramCache]: Analyzing trace with hash 566089800, now seen corresponding path program 1 times [2022-07-20 05:32:54,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:32:54,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410873228] [2022-07-20 05:32:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:32:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:32:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:54,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:32:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:54,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:32:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:54,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:32:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:54,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:32:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:32:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:32:54,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:32:54,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410873228] [2022-07-20 05:32:54,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410873228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:32:54,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:32:54,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:32:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837927334] [2022-07-20 05:32:54,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:32:54,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:32:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:32:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:32:54,163 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:32:56,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-20 05:32:58,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-20 05:33:00,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-20 05:33:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:33:00,859 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2022-07-20 05:33:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:33:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-07-20 05:33:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:33:00,860 INFO L225 Difference]: With dead ends: 208 [2022-07-20 05:33:00,860 INFO L226 Difference]: Without dead ends: 208 [2022-07-20 05:33:00,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:33:00,861 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 422 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:33:00,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 855 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-07-20 05:33:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-20 05:33:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2022-07-20 05:33:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 101 states have (on average 1.4653465346534653) internal successors, (148), 124 states have internal predecessors, (148), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 05:33:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2022-07-20 05:33:00,867 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 33 [2022-07-20 05:33:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:33:00,874 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2022-07-20 05:33:00,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 05:33:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2022-07-20 05:33:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:33:00,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:33:00,876 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-07-20 05:33:00,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:33:00,877 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:33:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:33:00,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1785256912, now seen corresponding path program 1 times [2022-07-20 05:33:00,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:33:00,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366762358] [2022-07-20 05:33:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:33:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:33:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:01,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:33:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-20 05:33:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:01,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-20 05:33:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:01,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-20 05:33:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:33:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:33:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366762358] [2022-07-20 05:33:01,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366762358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:33:01,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743725335] [2022-07-20 05:33:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:33:01,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:33:01,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:33:01,059 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) [2022-07-20 05:33:01,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:33:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:33:01,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:33:01,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:33:01,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:33:01,340 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:33:01,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-20 05:33:01,370 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:33:01,371 INFO L390 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 11 treesize of output 11 [2022-07-20 05:33:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:33:01,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:33:02,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743725335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:33:02,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:33:02,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-20 05:33:02,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119907755] [2022-07-20 05:33:02,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:33:02,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:33:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:33:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:33:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:33:02,036 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:33:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:33:02,433 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2022-07-20 05:33:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:33:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-07-20 05:33:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:33:02,434 INFO L225 Difference]: With dead ends: 157 [2022-07-20 05:33:02,434 INFO L226 Difference]: Without dead ends: 157 [2022-07-20 05:33:02,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:33:02,435 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 386 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:33:02,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 395 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 308 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-07-20 05:33:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-20 05:33:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 136. [2022-07-20 05:33:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 125 states have internal predecessors, (149), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-20 05:33:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2022-07-20 05:33:02,440 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 34 [2022-07-20 05:33:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:33:02,440 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2022-07-20 05:33:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:33:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2022-07-20 05:33:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:33:02,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:33:02,442 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 05:33:02,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:33:02,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:33:02,652 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-20 05:33:02,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:33:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 661582495, now seen corresponding path program 1 times [2022-07-20 05:33:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:33:02,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853935416] [2022-07-20 05:33:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:33:02,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:33:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:02,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 05:33:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:02,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-20 05:33:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-20 05:33:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:02,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-20 05:33:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:33:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:33:02,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:33:02,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853935416] [2022-07-20 05:33:02,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853935416] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:33:02,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626382315] [2022-07-20 05:33:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:33:02,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:33:02,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:33:02,815 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) [2022-07-20 05:33:02,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process