./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 a31fd051 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-?-a31fd05 [2023-02-15 12:47:42,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:47:42,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:47:42,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:47:42,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:47:42,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:47:42,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:47:42,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:47:42,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:47:42,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:47:42,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:47:42,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:47:42,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:47:42,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:47:42,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:47:42,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:47:42,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:47:42,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:47:42,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:47:42,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:47:42,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:47:42,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:47:42,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:47:42,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:47:42,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:47:42,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:47:42,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:47:42,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:47:42,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:47:42,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:47:42,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:47:42,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:47:42,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:47:42,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:47:42,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:47:42,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:47:42,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:47:42,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:47:42,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:47:42,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:47:42,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:47:42,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 12:47:42,732 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:47:42,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:47:42,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:47:42,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:47:42,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:47:42,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:47:42,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:47:42,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:47:42,736 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:47:42,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:47:42,737 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:47:42,737 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 12:47:42,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:47:42,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:47:42,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:47:42,738 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 12:47:42,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 12:47:42,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 12:47:42,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:47:42,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 12:47:42,739 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:47:42,739 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:47:42,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:47:42,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:47:42,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:47:42,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:47:42,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:47:42,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:47:42,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:47:42,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:47:42,740 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:47:42,741 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:47:42,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:47:42,741 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:47:42,741 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-02-15 12:47:42,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:47:43,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:47:43,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:47:43,004 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:47:43,004 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:47:43,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-02-15 12:47:44,130 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:47:44,319 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:47:44,319 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-02-15 12:47:44,324 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3602bf34e/1b4b6051070043fea48936a85aed9b30/FLAG4f122d57f [2023-02-15 12:47:44,333 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3602bf34e/1b4b6051070043fea48936a85aed9b30 [2023-02-15 12:47:44,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:47:44,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:47:44,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:47:44,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:47:44,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:47:44,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe637af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44, skipping insertion in model container [2023-02-15 12:47:44,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:47:44,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:47:44,469 WARN L237 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] [2023-02-15 12:47:44,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:47:44,499 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:47:44,507 WARN L237 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] [2023-02-15 12:47:44,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:47:44,529 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:47:44,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44 WrapperNode [2023-02-15 12:47:44,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:47:44,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:47:44,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:47:44,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:47:44,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,563 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2023-02-15 12:47:44,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:47:44,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:47:44,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:47:44,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:47:44,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,587 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:47:44,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:47:44,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:47:44,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:47:44,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (1/1) ... [2023-02-15 12:47:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:47:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:44,642 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) [2023-02-15 12:47:44,645 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 [2023-02-15 12:47:44,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:47:44,676 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 12:47:44,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 12:47:44,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:47:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 12:47:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 12:47:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:47:44,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:47:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 12:47:44,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-02-15 12:47:44,678 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-02-15 12:47:44,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 12:47:44,789 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:47:44,791 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:47:45,181 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:47:45,186 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:47:45,186 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-15 12:47:45,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:47:45 BoogieIcfgContainer [2023-02-15 12:47:45,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:47:45,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:47:45,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:47:45,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:47:45,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:47:44" (1/3) ... [2023-02-15 12:47:45,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3863106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:47:45, skipping insertion in model container [2023-02-15 12:47:45,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:47:44" (2/3) ... [2023-02-15 12:47:45,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3863106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:47:45, skipping insertion in model container [2023-02-15 12:47:45,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:47:45" (3/3) ... [2023-02-15 12:47:45,196 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-02-15 12:47:45,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:47:45,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-02-15 12:47:45,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:47:45,270 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=PETRI_NET, 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55af93bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:47:45,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-02-15 12:47:45,274 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) [2023-02-15 12:47:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 12:47:45,282 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:45,282 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] [2023-02-15 12:47:45,283 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)] === [2023-02-15 12:47:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1116940539, now seen corresponding path program 1 times [2023-02-15 12:47:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:45,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763422639] [2023-02-15 12:47:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:45,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:45,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763422639] [2023-02-15 12:47:45,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763422639] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:45,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:45,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 12:47:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099710438] [2023-02-15 12:47:45,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:45,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 12:47:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:45,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 12:47:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 12:47:45,559 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) [2023-02-15 12:47:45,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:45,630 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-02-15 12:47:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 12:47:45,632 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 [2023-02-15 12:47:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:45,638 INFO L225 Difference]: With dead ends: 102 [2023-02-15 12:47:45,638 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 12:47:45,640 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 [2023-02-15 12:47:45,643 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:45,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:47:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 12:47:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-15 12:47:45,673 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) [2023-02-15 12:47:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-02-15 12:47:45,678 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 29 [2023-02-15 12:47:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:45,678 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-02-15 12:47:45,679 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) [2023-02-15 12:47:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-02-15 12:47:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 12:47:45,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:45,681 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] [2023-02-15 12:47:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:47:45,681 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)] === [2023-02-15 12:47:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 236420795, now seen corresponding path program 1 times [2023-02-15 12:47:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613859535] [2023-02-15 12:47:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:45,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:45,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613859535] [2023-02-15 12:47:45,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613859535] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:45,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:45,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:47:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772459973] [2023-02-15 12:47:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:47:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:47:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:47:45,908 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) [2023-02-15 12:47:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:46,007 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-02-15 12:47:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:47:46,008 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 [2023-02-15 12:47:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:46,009 INFO L225 Difference]: With dead ends: 98 [2023-02-15 12:47:46,009 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 12:47:46,010 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 [2023-02-15 12:47:46,011 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 153 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:46,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 155 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 12:47:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-15 12:47:46,018 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) [2023-02-15 12:47:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-15 12:47:46,019 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 29 [2023-02-15 12:47:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:46,021 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-15 12:47:46,021 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) [2023-02-15 12:47:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-15 12:47:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 12:47:46,022 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:46,022 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] [2023-02-15 12:47:46,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 12:47:46,022 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)] === [2023-02-15 12:47:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 236420796, now seen corresponding path program 1 times [2023-02-15 12:47:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815911861] [2023-02-15 12:47:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:46,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:46,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:46,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:46,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:46,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:46,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:46,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815911861] [2023-02-15 12:47:46,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815911861] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:46,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:46,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 12:47:46,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590759031] [2023-02-15 12:47:46,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:46,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:47:46,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:46,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:47:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:47:46,768 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 12:47:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:47,801 INFO L93 Difference]: Finished difference Result 260 states and 282 transitions. [2023-02-15 12:47:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:47:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-02-15 12:47:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:47,803 INFO L225 Difference]: With dead ends: 260 [2023-02-15 12:47:47,804 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 12:47:47,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:47:47,805 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 915 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:47,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 516 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:47:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 12:47:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2023-02-15 12:47:47,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.6728971962616823) internal successors, (179), 138 states have internal predecessors, (179), 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) [2023-02-15 12:47:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2023-02-15 12:47:47,817 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 29 [2023-02-15 12:47:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:47,817 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2023-02-15 12:47:47,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 12:47:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2023-02-15 12:47:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 12:47:47,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:47,819 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] [2023-02-15 12:47:47,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 12:47:47,819 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)] === [2023-02-15 12:47:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889940, now seen corresponding path program 1 times [2023-02-15 12:47:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735516832] [2023-02-15 12:47:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:47,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:47,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:47,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:47,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:47,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:47,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735516832] [2023-02-15 12:47:47,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735516832] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:47,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:47,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:47:47,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570157277] [2023-02-15 12:47:47,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:47,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:47:47,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:47,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:47:47,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:47:47,882 INFO L87 Difference]: Start difference. First operand 148 states and 193 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) [2023-02-15 12:47:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:47,956 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2023-02-15 12:47:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:47:47,956 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 [2023-02-15 12:47:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:47,957 INFO L225 Difference]: With dead ends: 147 [2023-02-15 12:47:47,957 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 12:47:47,958 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 [2023-02-15 12:47:47,959 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:47,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 165 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 12:47:47,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-15 12:47:47,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.6542056074766356) internal successors, (177), 137 states have internal predecessors, (177), 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) [2023-02-15 12:47:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2023-02-15 12:47:47,967 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2023-02-15 12:47:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:47,967 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2023-02-15 12:47:47,968 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) [2023-02-15 12:47:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2023-02-15 12:47:47,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 12:47:47,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:47,969 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] [2023-02-15 12:47:47,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 12:47:47,969 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)] === [2023-02-15 12:47:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:47,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889939, now seen corresponding path program 1 times [2023-02-15 12:47:47,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:47,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977585562] [2023-02-15 12:47:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:47,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:48,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:48,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:48,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:48,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977585562] [2023-02-15 12:47:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977585562] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:48,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:48,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 12:47:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882112267] [2023-02-15 12:47:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:47:48,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:47:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:47:48,196 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2023-02-15 12:47:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:48,512 INFO L93 Difference]: Finished difference Result 257 states and 334 transitions. [2023-02-15 12:47:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:47:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 30 [2023-02-15 12:47:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:48,514 INFO L225 Difference]: With dead ends: 257 [2023-02-15 12:47:48,514 INFO L226 Difference]: Without dead ends: 257 [2023-02-15 12:47:48,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:47:48,515 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 405 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:48,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 258 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:47:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-15 12:47:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 147. [2023-02-15 12:47:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.6388888888888888) internal successors, (177), 137 states have internal predecessors, (177), 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) [2023-02-15 12:47:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2023-02-15 12:47:48,532 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2023-02-15 12:47:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:48,533 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2023-02-15 12:47:48,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2023-02-15 12:47:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2023-02-15 12:47:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 12:47:48,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:48,535 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] [2023-02-15 12:47:48,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 12:47:48,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1311333523, now seen corresponding path program 1 times [2023-02-15 12:47:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042760900] [2023-02-15 12:47:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:49,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:49,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:47:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:49,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:47:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:49,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:47:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:49,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:49,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042760900] [2023-02-15 12:47:49,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042760900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:49,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409281905] [2023-02-15 12:47:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:49,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:49,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:49,085 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) [2023-02-15 12:47:49,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:47:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:47:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:49,318 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:47:49,327 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:47:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 12:47:49,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-02-15 12:47:49,516 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:47:49,517 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:47:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:47:49,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:49,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409281905] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:49,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:47:49,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-02-15 12:47:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201688605] [2023-02-15 12:47:49,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:47:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:47:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-02-15 12:47:49,920 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 12:47:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:51,477 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2023-02-15 12:47:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:47:51,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2023-02-15 12:47:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:51,478 INFO L225 Difference]: With dead ends: 225 [2023-02-15 12:47:51,479 INFO L226 Difference]: Without dead ends: 225 [2023-02-15 12:47:51,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 12:47:51,480 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1200 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:51,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 649 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:47:51,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-15 12:47:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 150. [2023-02-15 12:47:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 112 states have (on average 1.5892857142857142) internal successors, (178), 140 states have internal predecessors, (178), 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) [2023-02-15 12:47:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2023-02-15 12:47:51,487 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 30 [2023-02-15 12:47:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:51,487 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2023-02-15 12:47:51,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 12:47:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2023-02-15 12:47:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 12:47:51,489 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:51,489 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] [2023-02-15 12:47:51,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-15 12:47:51,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:51,695 INFO L85 PathProgramCache]: Analyzing trace with hash -535927024, now seen corresponding path program 1 times [2023-02-15 12:47:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773739083] [2023-02-15 12:47:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:51,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:51,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:51,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:51,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773739083] [2023-02-15 12:47:51,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773739083] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:51,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:51,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 12:47:51,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080763986] [2023-02-15 12:47:51,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:51,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:47:51,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:51,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:47:51,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:47:51,820 INFO L87 Difference]: Start difference. First operand 150 states and 192 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) [2023-02-15 12:47:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:51,956 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2023-02-15 12:47:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:47:51,957 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 [2023-02-15 12:47:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:51,959 INFO L225 Difference]: With dead ends: 246 [2023-02-15 12:47:51,959 INFO L226 Difference]: Without dead ends: 246 [2023-02-15 12:47:51,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:47:51,961 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 334 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:51,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 471 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-15 12:47:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2023-02-15 12:47:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.5471698113207548) internal successors, (164), 134 states have internal predecessors, (164), 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) [2023-02-15 12:47:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2023-02-15 12:47:51,969 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 32 [2023-02-15 12:47:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:51,969 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2023-02-15 12:47:51,969 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) [2023-02-15 12:47:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2023-02-15 12:47:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 12:47:51,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:51,970 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] [2023-02-15 12:47:51,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 12:47:51,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash 566089799, now seen corresponding path program 1 times [2023-02-15 12:47:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419450753] [2023-02-15 12:47:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:52,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419450753] [2023-02-15 12:47:52,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419450753] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:52,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:52,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:47:52,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454808363] [2023-02-15 12:47:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:52,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 12:47:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 12:47:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:47:52,061 INFO L87 Difference]: Start difference. First operand 144 states and 178 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) [2023-02-15 12:47:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:52,156 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2023-02-15 12:47:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 12:47:52,157 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 [2023-02-15 12:47:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:52,158 INFO L225 Difference]: With dead ends: 138 [2023-02-15 12:47:52,158 INFO L226 Difference]: Without dead ends: 138 [2023-02-15 12:47:52,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:47:52,159 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 173 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 169 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 [2023-02-15 12:47:52,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 169 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-15 12:47:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-02-15 12:47:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 106 states have (on average 1.4339622641509433) internal successors, (152), 128 states have internal predecessors, (152), 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) [2023-02-15 12:47:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2023-02-15 12:47:52,163 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 33 [2023-02-15 12:47:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:52,164 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2023-02-15 12:47:52,164 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) [2023-02-15 12:47:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2023-02-15 12:47:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 12:47:52,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:52,165 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] [2023-02-15 12:47:52,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 12:47:52,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:52,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:52,166 INFO L85 PathProgramCache]: Analyzing trace with hash 566089800, now seen corresponding path program 1 times [2023-02-15 12:47:52,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:52,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946376744] [2023-02-15 12:47:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 12:47:52,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:52,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946376744] [2023-02-15 12:47:52,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946376744] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:52,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:52,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 12:47:52,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862863177] [2023-02-15 12:47:52,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:52,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:47:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:52,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:47:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:47:52,349 INFO L87 Difference]: Start difference. First operand 138 states and 166 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) [2023-02-15 12:47:52,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:52,521 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2023-02-15 12:47:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 12:47:52,521 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 [2023-02-15 12:47:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:52,524 INFO L225 Difference]: With dead ends: 178 [2023-02-15 12:47:52,524 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 12:47:52,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:47:52,527 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 409 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:52,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 572 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 12:47:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 107. [2023-02-15 12:47:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.4) internal successors, (105), 97 states have internal predecessors, (105), 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) [2023-02-15 12:47:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2023-02-15 12:47:52,535 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 33 [2023-02-15 12:47:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:52,536 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2023-02-15 12:47:52,536 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) [2023-02-15 12:47:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2023-02-15 12:47:52,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 12:47:52,537 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:52,538 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-02-15 12:47:52,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 12:47:52,538 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:52,538 INFO L85 PathProgramCache]: Analyzing trace with hash -491610599, now seen corresponding path program 1 times [2023-02-15 12:47:52,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:52,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913322595] [2023-02-15 12:47:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:52,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:52,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913322595] [2023-02-15 12:47:52,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913322595] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:52,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024023044] [2023-02-15 12:47:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:52,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:52,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:52,812 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) [2023-02-15 12:47:52,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:47:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 12:47:52,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:52,898 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 9 [2023-02-15 12:47:53,085 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-02-15 12:47:53,085 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 20 [2023-02-15 12:47:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:53,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:53,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024023044] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:53,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:47:53,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-02-15 12:47:53,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279624781] [2023-02-15 12:47:53,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:53,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 12:47:53,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:53,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 12:47:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:47:53,749 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:47:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:54,614 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2023-02-15 12:47:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:47:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2023-02-15 12:47:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:54,616 INFO L225 Difference]: With dead ends: 107 [2023-02-15 12:47:54,616 INFO L226 Difference]: Without dead ends: 107 [2023-02-15 12:47:54,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-02-15 12:47:54,617 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 313 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:54,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 241 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:47:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-15 12:47:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2023-02-15 12:47:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 92 states have internal predecessors, (100), 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) [2023-02-15 12:47:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2023-02-15 12:47:54,620 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 35 [2023-02-15 12:47:54,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:54,620 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2023-02-15 12:47:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:47:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2023-02-15 12:47:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 12:47:54,621 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:54,621 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, 1, 1, 1] [2023-02-15 12:47:54,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:54,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 12:47:54,829 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash 7143804, now seen corresponding path program 1 times [2023-02-15 12:47:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:54,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335314892] [2023-02-15 12:47:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:54,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:54,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:54,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:54,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:54,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335314892] [2023-02-15 12:47:54,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335314892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:47:54,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:47:54,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:47:54,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39723484] [2023-02-15 12:47:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:47:54,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:47:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:47:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:47:54,893 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-02-15 12:47:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:54,960 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-02-15 12:47:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:47:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 37 [2023-02-15 12:47:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:54,962 INFO L225 Difference]: With dead ends: 101 [2023-02-15 12:47:54,962 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 12:47:54,962 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 [2023-02-15 12:47:54,963 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:54,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 162 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 12:47:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-02-15 12:47:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 89 states have internal predecessors, (97), 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) [2023-02-15 12:47:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2023-02-15 12:47:54,966 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 37 [2023-02-15 12:47:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:54,966 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2023-02-15 12:47:54,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2023-02-15 12:47:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2023-02-15 12:47:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 12:47:54,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:54,967 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, 1, 1, 1] [2023-02-15 12:47:54,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 12:47:54,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash 7143805, now seen corresponding path program 1 times [2023-02-15 12:47:54,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:54,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312132572] [2023-02-15 12:47:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:54,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:55,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312132572] [2023-02-15 12:47:55,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312132572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51384073] [2023-02-15 12:47:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:55,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:55,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:47:55,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:47:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 12:47:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:55,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51384073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:55,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:55,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-02-15 12:47:55,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834076232] [2023-02-15 12:47:55,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:55,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:47:55,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:47:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:47:55,216 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:47:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:55,380 INFO L93 Difference]: Finished difference Result 227 states and 247 transitions. [2023-02-15 12:47:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:47:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-02-15 12:47:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:55,381 INFO L225 Difference]: With dead ends: 227 [2023-02-15 12:47:55,381 INFO L226 Difference]: Without dead ends: 227 [2023-02-15 12:47:55,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:47:55,382 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 506 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:55,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 472 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-15 12:47:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 107. [2023-02-15 12:47:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.325) internal successors, (106), 97 states have internal predecessors, (106), 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) [2023-02-15 12:47:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2023-02-15 12:47:55,385 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 37 [2023-02-15 12:47:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:55,386 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2023-02-15 12:47:55,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:47:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2023-02-15 12:47:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 12:47:55,386 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:55,386 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, 1, 1, 1, 1] [2023-02-15 12:47:55,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:55,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:55,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash 221416284, now seen corresponding path program 1 times [2023-02-15 12:47:55,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884995970] [2023-02-15 12:47:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:55,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884995970] [2023-02-15 12:47:55,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884995970] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:55,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239473070] [2023-02-15 12:47:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:55,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:55,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:47:55,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:47:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 12:47:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:56,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:56,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-02-15 12:47:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:56,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239473070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:56,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:56,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-02-15 12:47:56,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147390188] [2023-02-15 12:47:56,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:56,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 12:47:56,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 12:47:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-02-15 12:47:56,237 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:47:56,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:56,965 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2023-02-15 12:47:56,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 12:47:56,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-02-15 12:47:56,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:56,966 INFO L225 Difference]: With dead ends: 169 [2023-02-15 12:47:56,967 INFO L226 Difference]: Without dead ends: 169 [2023-02-15 12:47:56,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:47:56,968 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1195 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:56,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 315 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:47:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-15 12:47:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2023-02-15 12:47:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.3125) internal successors, (105), 96 states have internal predecessors, (105), 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) [2023-02-15 12:47:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-02-15 12:47:56,971 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 38 [2023-02-15 12:47:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:56,972 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-02-15 12:47:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:47:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-02-15 12:47:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 12:47:56,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:56,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2023-02-15 12:47:56,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:57,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:57,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -311817583, now seen corresponding path program 2 times [2023-02-15 12:47:57,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:57,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711424819] [2023-02-15 12:47:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:57,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:57,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:57,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:57,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711424819] [2023-02-15 12:47:57,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711424819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347962524] [2023-02-15 12:47:57,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:47:57,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:57,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:47:57,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:47:57,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:47:57,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:47:57,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:47:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:57,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:57,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-15 12:47:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:57,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347962524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:57,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:57,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-02-15 12:47:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919084605] [2023-02-15 12:47:57,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:57,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 12:47:57,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:57,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 12:47:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-02-15 12:47:57,725 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:47:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:58,423 INFO L93 Difference]: Finished difference Result 375 states and 406 transitions. [2023-02-15 12:47:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 12:47:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2023-02-15 12:47:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:58,426 INFO L225 Difference]: With dead ends: 375 [2023-02-15 12:47:58,426 INFO L226 Difference]: Without dead ends: 375 [2023-02-15 12:47:58,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 12:47:58,428 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1727 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:58,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 636 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:47:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-02-15 12:47:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 118. [2023-02-15 12:47:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.358695652173913) internal successors, (125), 108 states have internal predecessors, (125), 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) [2023-02-15 12:47:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-02-15 12:47:58,437 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 42 [2023-02-15 12:47:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:58,437 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-02-15 12:47:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:47:58,438 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2023-02-15 12:47:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-15 12:47:58,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:58,438 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:47:58,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 12:47:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 12:47:58,644 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash -804107195, now seen corresponding path program 1 times [2023-02-15 12:47:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:58,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163237516] [2023-02-15 12:47:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:58,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:58,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:58,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:58,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:58,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163237516] [2023-02-15 12:47:58,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163237516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:58,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957315807] [2023-02-15 12:47:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:58,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:58,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:58,820 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:47:58,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:47:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 12:47:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:58,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:58,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957315807] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:58,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:58,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2023-02-15 12:47:58,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530741399] [2023-02-15 12:47:58,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:58,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:47:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:47:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:47:58,998 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:47:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:47:59,178 INFO L93 Difference]: Finished difference Result 319 states and 357 transitions. [2023-02-15 12:47:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:47:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-02-15 12:47:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:47:59,180 INFO L225 Difference]: With dead ends: 319 [2023-02-15 12:47:59,180 INFO L226 Difference]: Without dead ends: 319 [2023-02-15 12:47:59,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-02-15 12:47:59,181 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 350 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:47:59,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 851 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:47:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-15 12:47:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 125. [2023-02-15 12:47:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 115 states have internal predecessors, (133), 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) [2023-02-15 12:47:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2023-02-15 12:47:59,185 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 42 [2023-02-15 12:47:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:47:59,186 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2023-02-15 12:47:59,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:47:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-02-15 12:47:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 12:47:59,186 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:47:59,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2023-02-15 12:47:59,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:47:59,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 12:47:59,392 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:47:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:47:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1076410474, now seen corresponding path program 1 times [2023-02-15 12:47:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:47:59,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540603402] [2023-02-15 12:47:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:47:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:59,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:47:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:59,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:47:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:47:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:59,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:47:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:59,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:47:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540603402] [2023-02-15 12:47:59,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540603402] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:47:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016029267] [2023-02-15 12:47:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:47:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:47:59,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:47:59,585 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:47:59,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:47:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:47:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 12:47:59,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:47:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:59,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:47:59,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-02-15 12:47:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:47:59,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016029267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:47:59,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:47:59,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-02-15 12:47:59,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279675030] [2023-02-15 12:47:59,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:47:59,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 12:47:59,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:47:59,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 12:47:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-02-15 12:47:59,985 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:48:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:00,713 INFO L93 Difference]: Finished difference Result 311 states and 345 transitions. [2023-02-15 12:48:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 12:48:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2023-02-15 12:48:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:00,715 INFO L225 Difference]: With dead ends: 311 [2023-02-15 12:48:00,715 INFO L226 Difference]: Without dead ends: 311 [2023-02-15 12:48:00,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 12:48:00,716 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1017 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:00,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1017 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:48:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-15 12:48:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 125. [2023-02-15 12:48:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.32) internal successors, (132), 115 states have internal predecessors, (132), 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) [2023-02-15 12:48:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2023-02-15 12:48:00,727 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 43 [2023-02-15 12:48:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:00,727 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2023-02-15 12:48:00,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:48:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2023-02-15 12:48:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 12:48:00,729 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:00,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:00,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:00,934 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 842447236, now seen corresponding path program 1 times [2023-02-15 12:48:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:00,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133493217] [2023-02-15 12:48:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:01,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133493217] [2023-02-15 12:48:01,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133493217] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:01,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:48:01,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:48:01,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231395097] [2023-02-15 12:48:01,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:01,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:48:01,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:48:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:48:01,005 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-15 12:48:01,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:01,059 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2023-02-15 12:48:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:48:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 43 [2023-02-15 12:48:01,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:01,066 INFO L225 Difference]: With dead ends: 124 [2023-02-15 12:48:01,066 INFO L226 Difference]: Without dead ends: 124 [2023-02-15 12:48:01,066 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 [2023-02-15 12:48:01,067 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:01,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 185 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:48:01,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-15 12:48:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-02-15 12:48:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.31) internal successors, (131), 114 states have internal predecessors, (131), 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) [2023-02-15 12:48:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2023-02-15 12:48:01,071 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 43 [2023-02-15 12:48:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:01,071 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2023-02-15 12:48:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-15 12:48:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2023-02-15 12:48:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 12:48:01,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:01,072 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:01,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 12:48:01,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:01,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash 842447237, now seen corresponding path program 1 times [2023-02-15 12:48:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:01,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324349362] [2023-02-15 12:48:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:01,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324349362] [2023-02-15 12:48:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324349362] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36926236] [2023-02-15 12:48:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:01,323 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:01,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:48:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 12:48:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:01,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-15 12:48:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:01,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36926236] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:01,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2023-02-15 12:48:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577513900] [2023-02-15 12:48:01,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:01,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 12:48:01,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 12:48:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-15 12:48:01,576 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:48:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:02,197 INFO L93 Difference]: Finished difference Result 246 states and 279 transitions. [2023-02-15 12:48:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 12:48:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2023-02-15 12:48:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:02,198 INFO L225 Difference]: With dead ends: 246 [2023-02-15 12:48:02,198 INFO L226 Difference]: Without dead ends: 246 [2023-02-15 12:48:02,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 12:48:02,199 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 933 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:02,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 379 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:48:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-15 12:48:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2023-02-15 12:48:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 116 states have internal predecessors, (134), 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) [2023-02-15 12:48:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2023-02-15 12:48:02,203 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 43 [2023-02-15 12:48:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:02,203 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2023-02-15 12:48:02,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:48:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2023-02-15 12:48:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 12:48:02,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:02,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:02,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:02,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 12:48:02,410 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:02,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:02,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2137907964, now seen corresponding path program 1 times [2023-02-15 12:48:02,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:02,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862415766] [2023-02-15 12:48:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:02,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:02,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:02,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862415766] [2023-02-15 12:48:02,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862415766] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303664803] [2023-02-15 12:48:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:02,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:02,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:02,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:02,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 12:48:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:02,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 12:48:02,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:02,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303664803] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:02,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:02,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-02-15 12:48:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059417159] [2023-02-15 12:48:02,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:02,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:48:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:48:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:48:02,686 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:02,864 INFO L93 Difference]: Finished difference Result 222 states and 255 transitions. [2023-02-15 12:48:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 12:48:02,865 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-02-15 12:48:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:02,866 INFO L225 Difference]: With dead ends: 222 [2023-02-15 12:48:02,866 INFO L226 Difference]: Without dead ends: 222 [2023-02-15 12:48:02,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:48:02,866 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 419 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:02,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 385 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:48:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-02-15 12:48:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 126. [2023-02-15 12:48:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.303921568627451) internal successors, (133), 116 states have internal predecessors, (133), 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) [2023-02-15 12:48:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2023-02-15 12:48:02,871 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 45 [2023-02-15 12:48:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:02,871 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2023-02-15 12:48:02,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2023-02-15 12:48:02,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 12:48:02,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:02,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1] [2023-02-15 12:48:02,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:03,078 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1164235796, now seen corresponding path program 1 times [2023-02-15 12:48:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:03,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881141119] [2023-02-15 12:48:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:03,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:03,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:03,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:03,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:03,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881141119] [2023-02-15 12:48:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881141119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476158690] [2023-02-15 12:48:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:03,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:03,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:03,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 12:48:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:03,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 12:48:03,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:03,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:03,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476158690] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:03,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:03,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-02-15 12:48:03,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430248320] [2023-02-15 12:48:03,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:03,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 12:48:03,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 12:48:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:48:03,422 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:03,901 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2023-02-15 12:48:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 12:48:03,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2023-02-15 12:48:03,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:03,904 INFO L225 Difference]: With dead ends: 336 [2023-02-15 12:48:03,904 INFO L226 Difference]: Without dead ends: 336 [2023-02-15 12:48:03,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:48:03,906 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 892 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:03,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1354 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:48:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-02-15 12:48:03,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 127. [2023-02-15 12:48:03,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 117 states have internal predecessors, (131), 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) [2023-02-15 12:48:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2023-02-15 12:48:03,922 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 46 [2023-02-15 12:48:03,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:03,922 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2023-02-15 12:48:03,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2023-02-15 12:48:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 12:48:03,923 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:03,923 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:03,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:04,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:04,128 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1851808460, now seen corresponding path program 1 times [2023-02-15 12:48:04,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:04,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289662090] [2023-02-15 12:48:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:04,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:04,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:04,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:04,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:04,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:04,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289662090] [2023-02-15 12:48:04,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289662090] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080101047] [2023-02-15 12:48:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:04,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:04,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:04,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 12:48:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:04,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 12:48:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:04,676 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:48:04,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-02-15 12:48:04,787 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:48:04,788 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:48:04,809 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_316 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_316) |c_#memory_int|)) is different from true [2023-02-15 12:48:04,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-02-15 12:48:04,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-02-15 12:48:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-02-15 12:48:04,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-02-15 12:48:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-15 12:48:05,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:25,100 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2023-02-15 12:48:25,159 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2023-02-15 12:48:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080101047] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:29,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 12:48:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2023-02-15 12:48:29,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830542777] [2023-02-15 12:48:29,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:29,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 12:48:29,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:29,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 12:48:29,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=953, Unknown=21, NotChecked=192, Total=1260 [2023-02-15 12:48:29,229 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 12:48:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:31,465 INFO L93 Difference]: Finished difference Result 268 states and 295 transitions. [2023-02-15 12:48:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 12:48:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 46 [2023-02-15 12:48:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:31,466 INFO L225 Difference]: With dead ends: 268 [2023-02-15 12:48:31,466 INFO L226 Difference]: Without dead ends: 268 [2023-02-15 12:48:31,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=882, Invalid=4510, Unknown=22, NotChecked=438, Total=5852 [2023-02-15 12:48:31,468 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1283 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:31,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 1283 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1370 Invalid, 0 Unknown, 171 Unchecked, 0.7s Time] [2023-02-15 12:48:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-15 12:48:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 132. [2023-02-15 12:48:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 122 states have internal predecessors, (136), 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) [2023-02-15 12:48:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2023-02-15 12:48:31,472 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 46 [2023-02-15 12:48:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:31,473 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2023-02-15 12:48:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 12:48:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2023-02-15 12:48:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 12:48:31,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:31,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-02-15 12:48:31,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:31,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 12:48:31,675 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:31,675 INFO L85 PathProgramCache]: Analyzing trace with hash -316520070, now seen corresponding path program 1 times [2023-02-15 12:48:31,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:31,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50817359] [2023-02-15 12:48:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:31,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:31,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:31,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:31,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50817359] [2023-02-15 12:48:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50817359] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131769997] [2023-02-15 12:48:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:31,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:31,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:31,842 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:31,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 12:48:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:31,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 12:48:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:32,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:32,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131769997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:32,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:32,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-02-15 12:48:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357671584] [2023-02-15 12:48:32,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 12:48:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:32,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 12:48:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-02-15 12:48:32,091 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:32,507 INFO L93 Difference]: Finished difference Result 392 states and 429 transitions. [2023-02-15 12:48:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 12:48:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2023-02-15 12:48:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:32,509 INFO L225 Difference]: With dead ends: 392 [2023-02-15 12:48:32,509 INFO L226 Difference]: Without dead ends: 392 [2023-02-15 12:48:32,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:48:32,510 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1160 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:32,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 924 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:48:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-02-15 12:48:32,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 157. [2023-02-15 12:48:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 147 states have internal predecessors, (166), 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) [2023-02-15 12:48:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2023-02-15 12:48:32,515 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2023-02-15 12:48:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:32,515 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2023-02-15 12:48:32,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2023-02-15 12:48:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 12:48:32,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:32,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:32,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:32,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 12:48:32,721 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491564, now seen corresponding path program 1 times [2023-02-15 12:48:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:32,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631128101] [2023-02-15 12:48:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:32,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631128101] [2023-02-15 12:48:32,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631128101] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:32,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:48:32,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:48:32,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873237848] [2023-02-15 12:48:32,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:32,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:48:32,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:32,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:48:32,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:48:32,780 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2023-02-15 12:48:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:32,835 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2023-02-15 12:48:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:48:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 47 [2023-02-15 12:48:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:32,837 INFO L225 Difference]: With dead ends: 156 [2023-02-15 12:48:32,837 INFO L226 Difference]: Without dead ends: 156 [2023-02-15 12:48:32,838 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 [2023-02-15 12:48:32,838 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 62 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:32,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 193 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:48:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-15 12:48:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-02-15 12:48:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 133 states have (on average 1.2406015037593985) internal successors, (165), 146 states have internal predecessors, (165), 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) [2023-02-15 12:48:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2023-02-15 12:48:32,843 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 47 [2023-02-15 12:48:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:32,843 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2023-02-15 12:48:32,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2023-02-15 12:48:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2023-02-15 12:48:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 12:48:32,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:32,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 12:48:32,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491565, now seen corresponding path program 1 times [2023-02-15 12:48:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:32,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066808224] [2023-02-15 12:48:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:32,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:32,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066808224] [2023-02-15 12:48:32,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066808224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301738759] [2023-02-15 12:48:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:32,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:32,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:32,981 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:33,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 12:48:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 12:48:33,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:33,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:33,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-15 12:48:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:33,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301738759] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:33,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:33,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-02-15 12:48:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750027483] [2023-02-15 12:48:33,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:33,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 12:48:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 12:48:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:48:33,273 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 12:48:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:33,468 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2023-02-15 12:48:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:48:33,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2023-02-15 12:48:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:33,469 INFO L225 Difference]: With dead ends: 164 [2023-02-15 12:48:33,469 INFO L226 Difference]: Without dead ends: 164 [2023-02-15 12:48:33,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-02-15 12:48:33,470 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 305 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:33,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 223 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:48:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-15 12:48:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2023-02-15 12:48:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2408759124087592) internal successors, (170), 150 states have internal predecessors, (170), 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) [2023-02-15 12:48:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2023-02-15 12:48:33,473 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 47 [2023-02-15 12:48:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:33,473 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2023-02-15 12:48:33,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 12:48:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2023-02-15 12:48:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 12:48:33,474 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:33,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2023-02-15 12:48:33,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-15 12:48:33,675 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1797796267, now seen corresponding path program 1 times [2023-02-15 12:48:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:33,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737651513] [2023-02-15 12:48:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:33,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737651513] [2023-02-15 12:48:33,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737651513] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:33,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128406212] [2023-02-15 12:48:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:33,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:33,813 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 12:48:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 12:48:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:33,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:34,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128406212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:34,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:34,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-02-15 12:48:34,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135617293] [2023-02-15 12:48:34,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:34,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 12:48:34,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 12:48:34,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:48:34,046 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:34,336 INFO L93 Difference]: Finished difference Result 381 states and 418 transitions. [2023-02-15 12:48:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:48:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-02-15 12:48:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:34,338 INFO L225 Difference]: With dead ends: 381 [2023-02-15 12:48:34,338 INFO L226 Difference]: Without dead ends: 381 [2023-02-15 12:48:34,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-02-15 12:48:34,339 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 914 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:34,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 734 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:48:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-15 12:48:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 150. [2023-02-15 12:48:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 140 states have internal predecessors, (156), 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) [2023-02-15 12:48:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2023-02-15 12:48:34,343 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 51 [2023-02-15 12:48:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:34,343 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2023-02-15 12:48:34,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2023-02-15 12:48:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 12:48:34,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:34,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:34,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:34,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:34,544 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:34,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1655469456, now seen corresponding path program 1 times [2023-02-15 12:48:34,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:34,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083899902] [2023-02-15 12:48:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:34,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:34,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:34,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:34,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:34,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:34,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083899902] [2023-02-15 12:48:34,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083899902] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:34,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73288199] [2023-02-15 12:48:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:34,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:34,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:34,695 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:34,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 12:48:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 12:48:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:34,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:34,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73288199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:34,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:34,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2023-02-15 12:48:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027838337] [2023-02-15 12:48:34,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 12:48:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 12:48:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:48:34,901 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:35,071 INFO L93 Difference]: Finished difference Result 262 states and 292 transitions. [2023-02-15 12:48:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 12:48:35,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-02-15 12:48:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:35,073 INFO L225 Difference]: With dead ends: 262 [2023-02-15 12:48:35,073 INFO L226 Difference]: Without dead ends: 262 [2023-02-15 12:48:35,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:48:35,073 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 235 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:35,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 503 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:48:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-15 12:48:35,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2023-02-15 12:48:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 145 states have internal predecessors, (161), 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) [2023-02-15 12:48:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2023-02-15 12:48:35,079 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 51 [2023-02-15 12:48:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:35,080 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2023-02-15 12:48:35,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2023-02-15 12:48:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 12:48:35,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:35,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1] [2023-02-15 12:48:35,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:35,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 12:48:35,286 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash 772147598, now seen corresponding path program 2 times [2023-02-15 12:48:35,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:35,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726589936] [2023-02-15 12:48:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:35,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:35,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:35,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:35,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:35,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:35,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726589936] [2023-02-15 12:48:35,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726589936] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:35,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818375812] [2023-02-15 12:48:35,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:48:35,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:35,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:35,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:35,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 12:48:35,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:48:35,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:48:35,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 12:48:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:35,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:35,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-02-15 12:48:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:36,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818375812] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:36,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:36,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-02-15 12:48:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764268478] [2023-02-15 12:48:36,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:36,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 12:48:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:36,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 12:48:36,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-02-15 12:48:36,010 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 31 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:48:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:36,723 INFO L93 Difference]: Finished difference Result 282 states and 307 transitions. [2023-02-15 12:48:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 12:48:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2023-02-15 12:48:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:36,725 INFO L225 Difference]: With dead ends: 282 [2023-02-15 12:48:36,725 INFO L226 Difference]: Without dead ends: 282 [2023-02-15 12:48:36,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 12:48:36,726 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 907 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:36,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1042 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:48:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-15 12:48:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 159. [2023-02-15 12:48:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 149 states have internal predecessors, (166), 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) [2023-02-15 12:48:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-15 12:48:36,731 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 52 [2023-02-15 12:48:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:36,731 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-15 12:48:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:48:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-15 12:48:36,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 12:48:36,732 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:36,732 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2023-02-15 12:48:36,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:36,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 12:48:36,937 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1833228231, now seen corresponding path program 1 times [2023-02-15 12:48:36,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:36,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817774918] [2023-02-15 12:48:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:36,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:37,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:37,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:37,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:37,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:37,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817774918] [2023-02-15 12:48:37,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817774918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686622416] [2023-02-15 12:48:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:37,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:37,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:37,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:37,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 12:48:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:37,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 12:48:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:37,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:37,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686622416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:37,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:37,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2023-02-15 12:48:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274203205] [2023-02-15 12:48:37,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:37,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 12:48:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 12:48:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-02-15 12:48:37,833 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 32 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-02-15 12:48:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:38,490 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2023-02-15 12:48:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 12:48:38,490 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2023-02-15 12:48:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:38,492 INFO L225 Difference]: With dead ends: 290 [2023-02-15 12:48:38,492 INFO L226 Difference]: Without dead ends: 290 [2023-02-15 12:48:38,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 12:48:38,493 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 734 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:38,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1205 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:48:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-02-15 12:48:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 194. [2023-02-15 12:48:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 171 states have (on average 1.1754385964912282) internal successors, (201), 184 states have internal predecessors, (201), 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) [2023-02-15 12:48:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 215 transitions. [2023-02-15 12:48:38,497 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 215 transitions. Word has length 53 [2023-02-15 12:48:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:38,498 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 215 transitions. [2023-02-15 12:48:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2023-02-15 12:48:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 215 transitions. [2023-02-15 12:48:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 12:48:38,499 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:38,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:38,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 12:48:38,705 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1768212551, now seen corresponding path program 1 times [2023-02-15 12:48:38,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:38,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570318122] [2023-02-15 12:48:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:38,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570318122] [2023-02-15 12:48:38,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570318122] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:38,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:48:38,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:48:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368229476] [2023-02-15 12:48:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:48:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:38,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:48:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:48:38,758 INFO L87 Difference]: Start difference. First operand 194 states and 215 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2023-02-15 12:48:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:38,808 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2023-02-15 12:48:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:48:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 53 [2023-02-15 12:48:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:38,809 INFO L225 Difference]: With dead ends: 193 [2023-02-15 12:48:38,809 INFO L226 Difference]: Without dead ends: 193 [2023-02-15 12:48:38,810 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 [2023-02-15 12:48:38,810 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 108 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:38,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:48:38,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-15 12:48:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-15 12:48:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 171 states have (on average 1.1695906432748537) internal successors, (200), 183 states have internal predecessors, (200), 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) [2023-02-15 12:48:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2023-02-15 12:48:38,814 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 53 [2023-02-15 12:48:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:38,815 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2023-02-15 12:48:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2023-02-15 12:48:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2023-02-15 12:48:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 12:48:38,816 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:38,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1, 1] [2023-02-15 12:48:38,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 12:48:38,816 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:38,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1495879408, now seen corresponding path program 1 times [2023-02-15 12:48:38,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:38,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014303974] [2023-02-15 12:48:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:38,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:38,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:38,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014303974] [2023-02-15 12:48:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014303974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986462920] [2023-02-15 12:48:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:38,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:38,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:38,978 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:38,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 12:48:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 12:48:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:39,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986462920] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:39,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:39,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-02-15 12:48:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083501798] [2023-02-15 12:48:39,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 12:48:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 12:48:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-02-15 12:48:39,523 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 12:48:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:39,903 INFO L93 Difference]: Finished difference Result 341 states and 377 transitions. [2023-02-15 12:48:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 12:48:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2023-02-15 12:48:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:39,905 INFO L225 Difference]: With dead ends: 341 [2023-02-15 12:48:39,905 INFO L226 Difference]: Without dead ends: 341 [2023-02-15 12:48:39,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:48:39,906 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1001 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:39,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 976 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:48:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-02-15 12:48:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 203. [2023-02-15 12:48:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 193 states have internal predecessors, (211), 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) [2023-02-15 12:48:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 225 transitions. [2023-02-15 12:48:39,914 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 225 transitions. Word has length 54 [2023-02-15 12:48:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:39,915 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 225 transitions. [2023-02-15 12:48:39,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-02-15 12:48:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 225 transitions. [2023-02-15 12:48:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 12:48:39,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:39,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:39,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:40,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:40,123 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash -953582912, now seen corresponding path program 1 times [2023-02-15 12:48:40,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:40,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590673981] [2023-02-15 12:48:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:40,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:40,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:40,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590673981] [2023-02-15 12:48:40,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590673981] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:40,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:48:40,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 12:48:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682753609] [2023-02-15 12:48:40,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:40,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:48:40,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:48:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:48:40,183 INFO L87 Difference]: Start difference. First operand 203 states and 225 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-02-15 12:48:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:40,228 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2023-02-15 12:48:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:48:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 56 [2023-02-15 12:48:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:40,230 INFO L225 Difference]: With dead ends: 202 [2023-02-15 12:48:40,230 INFO L226 Difference]: Without dead ends: 202 [2023-02-15 12:48:40,231 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 [2023-02-15 12:48:40,231 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 102 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:40,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 151 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:48:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-15 12:48:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-02-15 12:48:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 181 states have (on average 1.160220994475138) internal successors, (210), 192 states have internal predecessors, (210), 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) [2023-02-15 12:48:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2023-02-15 12:48:40,237 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 56 [2023-02-15 12:48:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:40,237 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2023-02-15 12:48:40,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-02-15 12:48:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2023-02-15 12:48:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 12:48:40,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:40,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:40,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 12:48:40,239 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 841059847, now seen corresponding path program 1 times [2023-02-15 12:48:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:40,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420608063] [2023-02-15 12:48:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:40,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420608063] [2023-02-15 12:48:40,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420608063] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287855586] [2023-02-15 12:48:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:40,556 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:40,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 12:48:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 12:48:40,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:40,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:41,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-02-15 12:48:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:41,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287855586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:41,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:41,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-02-15 12:48:41,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816334345] [2023-02-15 12:48:41,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:41,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 12:48:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 12:48:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 12:48:41,432 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand has 37 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:48:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:45,017 INFO L93 Difference]: Finished difference Result 598 states and 646 transitions. [2023-02-15 12:48:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 12:48:45,017 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2023-02-15 12:48:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:45,019 INFO L225 Difference]: With dead ends: 598 [2023-02-15 12:48:45,019 INFO L226 Difference]: Without dead ends: 598 [2023-02-15 12:48:45,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1641, Invalid=5841, Unknown=0, NotChecked=0, Total=7482 [2023-02-15 12:48:45,022 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2038 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:45,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2039 Valid, 1592 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 12:48:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-02-15 12:48:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 202. [2023-02-15 12:48:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 183 states have (on average 1.1530054644808743) internal successors, (211), 192 states have internal predecessors, (211), 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) [2023-02-15 12:48:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 225 transitions. [2023-02-15 12:48:45,028 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 225 transitions. Word has length 56 [2023-02-15 12:48:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:45,028 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 225 transitions. [2023-02-15 12:48:45,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:48:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 225 transitions. [2023-02-15 12:48:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 12:48:45,029 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:45,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:45,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:45,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:45,236 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash 503701003, now seen corresponding path program 1 times [2023-02-15 12:48:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:45,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726349739] [2023-02-15 12:48:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:45,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:45,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:45,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726349739] [2023-02-15 12:48:45,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726349739] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:45,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:48:45,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 12:48:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673284873] [2023-02-15 12:48:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:45,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:48:45,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:45,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:48:45,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 12:48:45,347 INFO L87 Difference]: Start difference. First operand 202 states and 225 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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) [2023-02-15 12:48:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:45,439 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2023-02-15 12:48:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:48:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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 57 [2023-02-15 12:48:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:45,440 INFO L225 Difference]: With dead ends: 201 [2023-02-15 12:48:45,440 INFO L226 Difference]: Without dead ends: 201 [2023-02-15 12:48:45,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:48:45,441 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 148 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:45,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 140 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:48:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-15 12:48:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-02-15 12:48:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 183 states have (on average 1.1475409836065573) internal successors, (210), 191 states have internal predecessors, (210), 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) [2023-02-15 12:48:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 224 transitions. [2023-02-15 12:48:45,445 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 224 transitions. Word has length 57 [2023-02-15 12:48:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:45,445 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 224 transitions. [2023-02-15 12:48:45,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 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) [2023-02-15 12:48:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 224 transitions. [2023-02-15 12:48:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 12:48:45,446 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:45,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:45,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 12:48:45,447 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1565137885, now seen corresponding path program 1 times [2023-02-15 12:48:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:45,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977927026] [2023-02-15 12:48:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:45,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 12:48:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 12:48:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 12:48:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:45,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977927026] [2023-02-15 12:48:45,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977927026] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:45,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:48:45,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 12:48:45,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150064767] [2023-02-15 12:48:45,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:45,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 12:48:45,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:45,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 12:48:45,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 12:48:45,725 INFO L87 Difference]: Start difference. First operand 201 states and 224 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2023-02-15 12:48:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:45,877 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2023-02-15 12:48:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 12:48:45,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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 58 [2023-02-15 12:48:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:45,878 INFO L225 Difference]: With dead ends: 200 [2023-02-15 12:48:45,878 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 12:48:45,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:48:45,879 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:45,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 244 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:48:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 12:48:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-02-15 12:48:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 156 states have (on average 1.1538461538461537) internal successors, (180), 163 states have internal predecessors, (180), 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) [2023-02-15 12:48:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2023-02-15 12:48:45,882 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 58 [2023-02-15 12:48:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:45,883 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2023-02-15 12:48:45,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 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) [2023-02-15 12:48:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2023-02-15 12:48:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 12:48:45,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:45,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:45,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 12:48:45,884 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:45,884 INFO L85 PathProgramCache]: Analyzing trace with hash 804662856, now seen corresponding path program 1 times [2023-02-15 12:48:45,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:45,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302719365] [2023-02-15 12:48:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:45,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:46,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:46,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:46,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:46,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:46,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302719365] [2023-02-15 12:48:46,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302719365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49836782] [2023-02-15 12:48:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:46,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:46,359 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:46,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 12:48:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-15 12:48:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:46,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:46,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-02-15 12:48:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:47,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49836782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:47,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:47,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 41 [2023-02-15 12:48:47,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930625834] [2023-02-15 12:48:47,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:47,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 12:48:47,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:47,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 12:48:47,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 12:48:47,208 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 42 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:48:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:52,343 INFO L93 Difference]: Finished difference Result 772 states and 861 transitions. [2023-02-15 12:48:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-15 12:48:52,344 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2023-02-15 12:48:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:52,346 INFO L225 Difference]: With dead ends: 772 [2023-02-15 12:48:52,346 INFO L226 Difference]: Without dead ends: 772 [2023-02-15 12:48:52,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2331, Invalid=8175, Unknown=0, NotChecked=0, Total=10506 [2023-02-15 12:48:52,349 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1854 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:52,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1855 Valid, 1666 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 12:48:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-02-15 12:48:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 198. [2023-02-15 12:48:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 182 states have (on average 1.1758241758241759) internal successors, (214), 188 states have internal predecessors, (214), 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) [2023-02-15 12:48:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 228 transitions. [2023-02-15 12:48:52,356 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 228 transitions. Word has length 58 [2023-02-15 12:48:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:52,356 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 228 transitions. [2023-02-15 12:48:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 12:48:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 228 transitions. [2023-02-15 12:48:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 12:48:52,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:52,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 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, 1, 1, 1] [2023-02-15 12:48:52,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-15 12:48:52,563 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -226038058, now seen corresponding path program 2 times [2023-02-15 12:48:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:52,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972351131] [2023-02-15 12:48:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:52,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:52,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:52,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:52,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972351131] [2023-02-15 12:48:52,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972351131] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986357354] [2023-02-15 12:48:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:48:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:52,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:52,825 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:52,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 12:48:52,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:48:52,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:48:52,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 12:48:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:53,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-02-15 12:48:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:53,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986357354] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:53,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:53,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2023-02-15 12:48:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070119204] [2023-02-15 12:48:53,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 12:48:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 12:48:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-02-15 12:48:53,345 INFO L87 Difference]: Start difference. First operand 198 states and 228 transitions. Second operand has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:48:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:54,246 INFO L93 Difference]: Finished difference Result 330 states and 373 transitions. [2023-02-15 12:48:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:48:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2023-02-15 12:48:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:54,250 INFO L225 Difference]: With dead ends: 330 [2023-02-15 12:48:54,250 INFO L226 Difference]: Without dead ends: 330 [2023-02-15 12:48:54,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 12:48:54,251 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 645 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:54,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 952 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 12:48:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-15 12:48:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 199. [2023-02-15 12:48:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 183 states have (on average 1.174863387978142) internal successors, (215), 189 states have internal predecessors, (215), 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) [2023-02-15 12:48:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2023-02-15 12:48:54,256 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 59 [2023-02-15 12:48:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:54,256 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2023-02-15 12:48:54,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 12:48:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2023-02-15 12:48:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 12:48:54,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:54,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:54,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:54,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 12:48:54,462 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:54,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:54,463 INFO L85 PathProgramCache]: Analyzing trace with hash -812323954, now seen corresponding path program 1 times [2023-02-15 12:48:54,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531457712] [2023-02-15 12:48:54,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:54,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:54,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:54,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:54,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531457712] [2023-02-15 12:48:54,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531457712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:54,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225665056] [2023-02-15 12:48:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:54,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:54,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:54,636 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:54,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 12:48:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 12:48:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:48:54,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 12:48:54,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225665056] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:48:54,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 12:48:54,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 13 [2023-02-15 12:48:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739101433] [2023-02-15 12:48:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:48:54,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 12:48:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 12:48:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:48:54,785 INFO L87 Difference]: Start difference. First operand 199 states and 229 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:54,837 INFO L93 Difference]: Finished difference Result 203 states and 231 transitions. [2023-02-15 12:48:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 12:48:54,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 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 60 [2023-02-15 12:48:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:54,840 INFO L225 Difference]: With dead ends: 203 [2023-02-15 12:48:54,840 INFO L226 Difference]: Without dead ends: 203 [2023-02-15 12:48:54,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-02-15 12:48:54,841 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:54,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 234 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:48:54,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-15 12:48:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2023-02-15 12:48:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 185 states have (on average 1.172972972972973) internal successors, (217), 191 states have internal predecessors, (217), 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) [2023-02-15 12:48:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 231 transitions. [2023-02-15 12:48:54,846 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 231 transitions. Word has length 60 [2023-02-15 12:48:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:54,848 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 231 transitions. [2023-02-15 12:48:54,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 231 transitions. [2023-02-15 12:48:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 12:48:54,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:54,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1] [2023-02-15 12:48:54,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:55,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-15 12:48:55,055 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash 563297452, now seen corresponding path program 1 times [2023-02-15 12:48:55,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:55,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288708712] [2023-02-15 12:48:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:55,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:55,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:55,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 12:48:55,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:55,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288708712] [2023-02-15 12:48:55,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288708712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:55,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395374520] [2023-02-15 12:48:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:55,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:55,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:55,157 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:55,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 12:48:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 12:48:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:55,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395374520] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:55,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2023-02-15 12:48:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389121542] [2023-02-15 12:48:55,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 12:48:55,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 12:48:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-02-15 12:48:55,458 INFO L87 Difference]: Start difference. First operand 201 states and 231 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:55,829 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2023-02-15 12:48:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:48:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-02-15 12:48:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:55,830 INFO L225 Difference]: With dead ends: 246 [2023-02-15 12:48:55,830 INFO L226 Difference]: Without dead ends: 246 [2023-02-15 12:48:55,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 12:48:55,831 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 403 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:55,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 884 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:48:55,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-15 12:48:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 201. [2023-02-15 12:48:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 191 states have internal predecessors, (216), 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) [2023-02-15 12:48:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 230 transitions. [2023-02-15 12:48:55,839 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 230 transitions. Word has length 62 [2023-02-15 12:48:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:55,840 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 230 transitions. [2023-02-15 12:48:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 230 transitions. [2023-02-15 12:48:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 12:48:55,841 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:55,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 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] [2023-02-15 12:48:55,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:56,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:56,046 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1697403066, now seen corresponding path program 1 times [2023-02-15 12:48:56,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:56,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679548501] [2023-02-15 12:48:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:56,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:56,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:56,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:56,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 12:48:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679548501] [2023-02-15 12:48:56,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679548501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899288505] [2023-02-15 12:48:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:56,247 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:56,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 12:48:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 12:48:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:56,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:48:56,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899288505] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:56,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:56,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-02-15 12:48:56,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687909523] [2023-02-15 12:48:56,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:56,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 12:48:56,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 12:48:56,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-15 12:48:56,575 INFO L87 Difference]: Start difference. First operand 201 states and 230 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:57,154 INFO L93 Difference]: Finished difference Result 514 states and 595 transitions. [2023-02-15 12:48:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 12:48:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-02-15 12:48:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:57,157 INFO L225 Difference]: With dead ends: 514 [2023-02-15 12:48:57,157 INFO L226 Difference]: Without dead ends: 514 [2023-02-15 12:48:57,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:48:57,158 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 829 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:57,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 1319 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:48:57,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-02-15 12:48:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 242. [2023-02-15 12:48:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 226 states have (on average 1.1902654867256637) internal successors, (269), 232 states have internal predecessors, (269), 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) [2023-02-15 12:48:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 283 transitions. [2023-02-15 12:48:57,163 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 283 transitions. Word has length 63 [2023-02-15 12:48:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:57,164 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 283 transitions. [2023-02-15 12:48:57,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 283 transitions. [2023-02-15 12:48:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 12:48:57,165 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:57,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:57,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:57,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 12:48:57,370 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:57,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1085543347, now seen corresponding path program 1 times [2023-02-15 12:48:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:57,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445315819] [2023-02-15 12:48:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:57,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445315819] [2023-02-15 12:48:57,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445315819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:57,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719196118] [2023-02-15 12:48:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:57,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:57,529 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:57,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 12:48:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:57,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 12:48:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:57,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:57,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719196118] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:57,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:57,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2023-02-15 12:48:57,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369776211] [2023-02-15 12:48:57,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:57,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 12:48:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 12:48:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:48:57,806 INFO L87 Difference]: Start difference. First operand 242 states and 283 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:58,163 INFO L93 Difference]: Finished difference Result 381 states and 442 transitions. [2023-02-15 12:48:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 12:48:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-02-15 12:48:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:58,165 INFO L225 Difference]: With dead ends: 381 [2023-02-15 12:48:58,165 INFO L226 Difference]: Without dead ends: 381 [2023-02-15 12:48:58,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-15 12:48:58,166 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 270 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:58,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 604 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:48:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-15 12:48:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 244. [2023-02-15 12:48:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 228 states have (on average 1.1885964912280702) internal successors, (271), 234 states have internal predecessors, (271), 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) [2023-02-15 12:48:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 285 transitions. [2023-02-15 12:48:58,171 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 285 transitions. Word has length 63 [2023-02-15 12:48:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:58,172 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 285 transitions. [2023-02-15 12:48:58,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 285 transitions. [2023-02-15 12:48:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 12:48:58,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:58,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:48:58,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:58,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 12:48:58,378 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:58,379 INFO L85 PathProgramCache]: Analyzing trace with hash -593864845, now seen corresponding path program 1 times [2023-02-15 12:48:58,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:58,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537692186] [2023-02-15 12:48:58,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:58,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:58,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:58,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:58,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:58,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:48:58,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:58,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537692186] [2023-02-15 12:48:58,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537692186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099504486] [2023-02-15 12:48:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:58,537 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:58,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 12:48:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 12:48:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:48:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:58,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:48:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:48:58,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099504486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:48:58,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:48:58,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2023-02-15 12:48:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145327578] [2023-02-15 12:48:58,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:48:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 12:48:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:48:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 12:48:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-15 12:48:58,827 INFO L87 Difference]: Start difference. First operand 244 states and 285 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:48:59,227 INFO L93 Difference]: Finished difference Result 393 states and 457 transitions. [2023-02-15 12:48:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 12:48:59,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2023-02-15 12:48:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:48:59,228 INFO L225 Difference]: With dead ends: 393 [2023-02-15 12:48:59,228 INFO L226 Difference]: Without dead ends: 393 [2023-02-15 12:48:59,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2023-02-15 12:48:59,229 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 215 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:48:59,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1294 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:48:59,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-15 12:48:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 262. [2023-02-15 12:48:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 246 states have (on average 1.1829268292682926) internal successors, (291), 252 states have internal predecessors, (291), 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) [2023-02-15 12:48:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2023-02-15 12:48:59,234 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 65 [2023-02-15 12:48:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:48:59,234 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2023-02-15 12:48:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:48:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2023-02-15 12:48:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 12:48:59,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:48:59,235 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 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, 1] [2023-02-15 12:48:59,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 12:48:59,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-15 12:48:59,441 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:48:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:48:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1577858453, now seen corresponding path program 2 times [2023-02-15 12:48:59,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:48:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324275742] [2023-02-15 12:48:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:48:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:48:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:59,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:48:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:59,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:48:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:48:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:48:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:48:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:48:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:48:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324275742] [2023-02-15 12:48:59,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324275742] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:48:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79209334] [2023-02-15 12:48:59,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:48:59,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:48:59,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:48:59,709 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:48:59,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 12:48:59,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:48:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:48:59,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 12:48:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:49:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 12:49:00,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:49:00,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-02-15 12:49:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-15 12:49:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79209334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:49:00,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:49:00,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-02-15 12:49:00,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859176278] [2023-02-15 12:49:00,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:49:00,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 12:49:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:49:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 12:49:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 12:49:00,439 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:49:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:49:02,582 INFO L93 Difference]: Finished difference Result 563 states and 649 transitions. [2023-02-15 12:49:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 12:49:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2023-02-15 12:49:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:49:02,584 INFO L225 Difference]: With dead ends: 563 [2023-02-15 12:49:02,584 INFO L226 Difference]: Without dead ends: 563 [2023-02-15 12:49:02,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1267, Invalid=3989, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 12:49:02,585 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1099 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:49:02,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 938 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:49:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-02-15 12:49:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 285. [2023-02-15 12:49:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 269 states have (on average 1.1933085501858736) internal successors, (321), 275 states have internal predecessors, (321), 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) [2023-02-15 12:49:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 335 transitions. [2023-02-15 12:49:02,591 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 335 transitions. Word has length 67 [2023-02-15 12:49:02,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:49:02,592 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 335 transitions. [2023-02-15 12:49:02,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:49:02,592 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 335 transitions. [2023-02-15 12:49:02,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 12:49:02,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:49:02,593 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2023-02-15 12:49:02,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 12:49:02,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:02,801 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:49:02,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:49:02,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1797398521, now seen corresponding path program 1 times [2023-02-15 12:49:02,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:49:02,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383812444] [2023-02-15 12:49:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:49:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:02,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:49:02,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:02,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:49:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:03,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:49:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:03,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:49:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 12:49:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:49:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383812444] [2023-02-15 12:49:03,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383812444] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:49:03,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769731206] [2023-02-15 12:49:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:49:03,014 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:49:03,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 12:49:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:03,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 12:49:03,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:49:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:49:03,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:49:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 12:49:03,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769731206] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:49:03,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:49:03,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2023-02-15 12:49:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207352059] [2023-02-15 12:49:03,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:49:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 12:49:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:49:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 12:49:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-02-15 12:49:03,390 INFO L87 Difference]: Start difference. First operand 285 states and 335 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:49:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:49:03,847 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2023-02-15 12:49:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 12:49:03,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 71 [2023-02-15 12:49:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:49:03,849 INFO L225 Difference]: With dead ends: 519 [2023-02-15 12:49:03,849 INFO L226 Difference]: Without dead ends: 519 [2023-02-15 12:49:03,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 12:49:03,850 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 883 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:49:03,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1373 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:49:03,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-02-15 12:49:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 268. [2023-02-15 12:49:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 252 states have (on average 1.1746031746031746) internal successors, (296), 258 states have internal predecessors, (296), 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) [2023-02-15 12:49:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 310 transitions. [2023-02-15 12:49:03,856 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 310 transitions. Word has length 71 [2023-02-15 12:49:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:49:03,856 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 310 transitions. [2023-02-15 12:49:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:49:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 310 transitions. [2023-02-15 12:49:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 12:49:03,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:49:03,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:49:03,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-15 12:49:04,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:04,063 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:49:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:49:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2098065761, now seen corresponding path program 1 times [2023-02-15 12:49:04,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:49:04,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691431359] [2023-02-15 12:49:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:49:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:05,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:49:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:05,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:49:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:05,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:49:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:05,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:49:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 12:49:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:49:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691431359] [2023-02-15 12:49:05,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691431359] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:49:05,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598837060] [2023-02-15 12:49:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:05,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:05,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:49:05,972 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:49:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 12:49:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-15 12:49:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:49:06,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-02-15 12:49:06,804 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 12:49:06,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-02-15 12:49:06,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-15 12:49:06,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-02-15 12:49:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 12:49:07,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:49:07,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2023-02-15 12:49:07,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-02-15 12:49:07,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-02-15 12:49:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 12:49:07,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598837060] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:49:07,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:49:07,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 21] total 64 [2023-02-15 12:49:07,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679220171] [2023-02-15 12:49:07,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:49:07,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 12:49:07,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:49:07,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 12:49:07,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3813, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 12:49:07,941 INFO L87 Difference]: Start difference. First operand 268 states and 310 transitions. Second operand has 64 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 12:49:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:49:21,184 INFO L93 Difference]: Finished difference Result 471 states and 539 transitions. [2023-02-15 12:49:21,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-15 12:49:21,184 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 72 [2023-02-15 12:49:21,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:49:21,185 INFO L225 Difference]: With dead ends: 471 [2023-02-15 12:49:21,185 INFO L226 Difference]: Without dead ends: 471 [2023-02-15 12:49:21,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1844, Invalid=17616, Unknown=0, NotChecked=0, Total=19460 [2023-02-15 12:49:21,187 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1351 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 4337 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:49:21,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1816 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4337 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-15 12:49:21,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-02-15 12:49:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2023-02-15 12:49:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 257 states have (on average 1.171206225680934) internal successors, (301), 263 states have internal predecessors, (301), 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) [2023-02-15 12:49:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 315 transitions. [2023-02-15 12:49:21,193 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 315 transitions. Word has length 72 [2023-02-15 12:49:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:49:21,193 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 315 transitions. [2023-02-15 12:49:21,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-15 12:49:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 315 transitions. [2023-02-15 12:49:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-15 12:49:21,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:49:21,194 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 2, 2, 2, 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] [2023-02-15 12:49:21,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 12:49:21,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:21,400 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:49:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:49:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1879843590, now seen corresponding path program 2 times [2023-02-15 12:49:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:49:21,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173312320] [2023-02-15 12:49:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:21,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:49:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:21,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:49:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:49:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:21,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:49:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:49:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:49:21,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:49:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173312320] [2023-02-15 12:49:21,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173312320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:49:21,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646720012] [2023-02-15 12:49:21,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:49:21,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:21,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:49:21,753 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:49:21,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 12:49:21,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:49:21,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:49:21,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 12:49:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:49:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:49:22,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:49:22,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-02-15 12:49:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:49:22,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646720012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:49:22,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:49:22,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2023-02-15 12:49:22,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641691453] [2023-02-15 12:49:22,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:49:22,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 12:49:22,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:49:22,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 12:49:22,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 12:49:22,530 INFO L87 Difference]: Start difference. First operand 273 states and 315 transitions. Second operand has 43 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:49:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:49:23,501 INFO L93 Difference]: Finished difference Result 410 states and 463 transitions. [2023-02-15 12:49:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 12:49:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 73 [2023-02-15 12:49:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:49:23,503 INFO L225 Difference]: With dead ends: 410 [2023-02-15 12:49:23,503 INFO L226 Difference]: Without dead ends: 410 [2023-02-15 12:49:23,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=839, Invalid=2821, Unknown=0, NotChecked=0, Total=3660 [2023-02-15 12:49:23,503 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 915 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 12:49:23,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1274 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 12:49:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-02-15 12:49:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 277. [2023-02-15 12:49:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 267 states have internal predecessors, (306), 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) [2023-02-15 12:49:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 320 transitions. [2023-02-15 12:49:23,508 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 320 transitions. Word has length 73 [2023-02-15 12:49:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:49:23,508 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 320 transitions. [2023-02-15 12:49:23,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:49:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 320 transitions. [2023-02-15 12:49:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 12:49:23,509 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:49:23,510 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 2, 2, 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] [2023-02-15 12:49:23,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 12:49:23,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-15 12:49:23,715 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:49:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:49:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1854390861, now seen corresponding path program 3 times [2023-02-15 12:49:23,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:49:23,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906898962] [2023-02-15 12:49:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:49:23,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:49:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:24,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:49:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:49:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:49:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:24,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:49:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:49:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:49:24,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:49:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906898962] [2023-02-15 12:49:24,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906898962] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:49:24,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937847995] [2023-02-15 12:49:24,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:49:24,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:49:24,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:49:24,057 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:49:24,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 12:49:24,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 12:49:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:49:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 12:49:24,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:49:24,584 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:49:25,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-02-15 12:49:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 12:49:25,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:49:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 12:49:26,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937847995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:49:26,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:49:26,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 18] total 49 [2023-02-15 12:49:26,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794259673] [2023-02-15 12:49:26,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:49:26,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 12:49:26,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:49:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 12:49:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 12:49:26,099 INFO L87 Difference]: Start difference. First operand 277 states and 320 transitions. Second operand has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 48 states have internal predecessors, (131), 9 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 12:49:32,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:35,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:37,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:39,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:41,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:44,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:47,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:49,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:51,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:53,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:55,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:49:58,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:50:00,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 12:50:01,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:50:01,793 INFO L93 Difference]: Finished difference Result 691 states and 778 transitions. [2023-02-15 12:50:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 12:50:01,794 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 48 states have internal predecessors, (131), 9 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) Word has length 74 [2023-02-15 12:50:01,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:50:01,795 INFO L225 Difference]: With dead ends: 691 [2023-02-15 12:50:01,795 INFO L226 Difference]: Without dead ends: 684 [2023-02-15 12:50:01,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4071 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2198, Invalid=14314, Unknown=0, NotChecked=0, Total=16512 [2023-02-15 12:50:01,797 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 1792 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 5772 mSolverCounterSat, 64 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 5853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 5772 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:50:01,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 3577 Invalid, 5853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 5772 Invalid, 17 Unknown, 0 Unchecked, 32.2s Time] [2023-02-15 12:50:01,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-15 12:50:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 337. [2023-02-15 12:50:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 317 states have (on average 1.160883280757098) internal successors, (368), 323 states have internal predecessors, (368), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 12:50:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2023-02-15 12:50:01,804 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 74 [2023-02-15 12:50:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:50:01,804 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2023-02-15 12:50:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 48 states have internal predecessors, (131), 9 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-15 12:50:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2023-02-15 12:50:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 12:50:01,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:50:01,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 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] [2023-02-15 12:50:01,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 12:50:02,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:50:02,011 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:50:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:50:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1481214108, now seen corresponding path program 2 times [2023-02-15 12:50:02,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:50:02,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946507459] [2023-02-15 12:50:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:50:02,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:50:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:02,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:50:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:02,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 12:50:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:02,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 12:50:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:02,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 12:50:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 12:50:02,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:50:02,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946507459] [2023-02-15 12:50:02,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946507459] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:50:02,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66630693] [2023-02-15 12:50:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:50:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:50:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:50:02,216 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:50:02,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 12:50:02,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:50:02,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:50:02,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 12:50:02,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:50:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:50:02,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:50:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 12:50:02,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66630693] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:50:02,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:50:02,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 20 [2023-02-15 12:50:02,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129158222] [2023-02-15 12:50:02,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:50:02,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 12:50:02,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:50:02,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 12:50:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-15 12:50:02,562 INFO L87 Difference]: Start difference. First operand 337 states and 388 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 19 states have internal predecessors, (99), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:50:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:50:03,061 INFO L93 Difference]: Finished difference Result 512 states and 584 transitions. [2023-02-15 12:50:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 12:50:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 19 states have internal predecessors, (99), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2023-02-15 12:50:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:50:03,063 INFO L225 Difference]: With dead ends: 512 [2023-02-15 12:50:03,063 INFO L226 Difference]: Without dead ends: 512 [2023-02-15 12:50:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 12:50:03,064 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 666 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:50:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1296 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:50:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-02-15 12:50:03,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 329. [2023-02-15 12:50:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 309 states have (on average 1.1521035598705502) internal successors, (356), 315 states have internal predecessors, (356), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 12:50:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 376 transitions. [2023-02-15 12:50:03,069 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 376 transitions. Word has length 75 [2023-02-15 12:50:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:50:03,070 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 376 transitions. [2023-02-15 12:50:03,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 19 states have internal predecessors, (99), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:50:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 376 transitions. [2023-02-15 12:50:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-15 12:50:03,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:50:03,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:50:03,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 12:50:03,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:50:03,277 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:50:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:50:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1833874459, now seen corresponding path program 1 times [2023-02-15 12:50:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:50:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745965326] [2023-02-15 12:50:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:50:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:50:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:03,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:50:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:03,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:50:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:03,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:50:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:03,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:50:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 12:50:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:50:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745965326] [2023-02-15 12:50:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745965326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:50:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047392669] [2023-02-15 12:50:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:50:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:50:03,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:50:03,499 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:50:03,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 12:50:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:03,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 12:50:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:50:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:50:03,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:50:03,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-02-15 12:50:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 12:50:04,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047392669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:50:04,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:50:04,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-02-15 12:50:04,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909182081] [2023-02-15 12:50:04,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:50:04,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 12:50:04,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:50:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 12:50:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-02-15 12:50:04,017 INFO L87 Difference]: Start difference. First operand 329 states and 376 transitions. Second operand has 25 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:50:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:50:04,262 INFO L93 Difference]: Finished difference Result 344 states and 390 transitions. [2023-02-15 12:50:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 12:50:04,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 77 [2023-02-15 12:50:04,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:50:04,264 INFO L225 Difference]: With dead ends: 344 [2023-02-15 12:50:04,264 INFO L226 Difference]: Without dead ends: 344 [2023-02-15 12:50:04,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 12:50:04,264 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 403 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:50:04,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 290 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:50:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-02-15 12:50:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 333. [2023-02-15 12:50:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 313 states have (on average 1.1501597444089458) internal successors, (360), 319 states have internal predecessors, (360), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 12:50:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 380 transitions. [2023-02-15 12:50:04,272 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 380 transitions. Word has length 77 [2023-02-15 12:50:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:50:04,273 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 380 transitions. [2023-02-15 12:50:04,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 12:50:04,273 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 380 transitions. [2023-02-15 12:50:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-15 12:50:04,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:50:04,275 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 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] [2023-02-15 12:50:04,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 12:50:04,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 12:50:04,481 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:50:04,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:50:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1224026182, now seen corresponding path program 3 times [2023-02-15 12:50:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:50:04,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956199323] [2023-02-15 12:50:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:50:04,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:50:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:50:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 12:50:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:04,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 12:50:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:04,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 12:50:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 83 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 12:50:04,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:50:04,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956199323] [2023-02-15 12:50:04,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956199323] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:50:04,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793080953] [2023-02-15 12:50:04,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:50:04,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:50:04,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:50:04,759 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:50:04,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 12:50:04,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 12:50:04,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:50:04,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 12:50:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:50:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 12:50:05,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:50:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 12:50:05,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793080953] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:50:05,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:50:05,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 31 [2023-02-15 12:50:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153237138] [2023-02-15 12:50:05,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:50:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 12:50:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:50:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 12:50:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-02-15 12:50:05,317 INFO L87 Difference]: Start difference. First operand 333 states and 380 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:50:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:50:07,579 INFO L93 Difference]: Finished difference Result 618 states and 700 transitions. [2023-02-15 12:50:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 12:50:07,579 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2023-02-15 12:50:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:50:07,581 INFO L225 Difference]: With dead ends: 618 [2023-02-15 12:50:07,581 INFO L226 Difference]: Without dead ends: 618 [2023-02-15 12:50:07,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1635, Invalid=8465, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 12:50:07,582 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1741 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 12:50:07,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1744 Valid, 673 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 12:50:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-02-15 12:50:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 356. [2023-02-15 12:50:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 336 states have (on average 1.1339285714285714) internal successors, (381), 342 states have internal predecessors, (381), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 12:50:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 401 transitions. [2023-02-15 12:50:07,588 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 401 transitions. Word has length 79 [2023-02-15 12:50:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:50:07,589 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 401 transitions. [2023-02-15 12:50:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 12:50:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 401 transitions. [2023-02-15 12:50:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 12:50:07,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:50:07,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:50:07,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-15 12:50:07,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-15 12:50:07,795 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-02-15 12:50:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:50:07,796 INFO L85 PathProgramCache]: Analyzing trace with hash 970084470, now seen corresponding path program 1 times [2023-02-15 12:50:07,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:50:07,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373994332] [2023-02-15 12:50:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:50:07,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:50:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:10,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 12:50:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 12:50:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:10,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 12:50:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:10,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 12:50:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 12:50:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:50:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373994332] [2023-02-15 12:50:10,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373994332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:50:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734123717] [2023-02-15 12:50:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:50:10,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:50:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:50:10,609 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 12:50:10,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 12:50:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:50:10,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 142 conjunts are in the unsatisfiable core [2023-02-15 12:50:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:50:10,891 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:50:10,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-02-15 12:50:11,007 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 12:50:11,007 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 12:50:11,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-02-15 12:50:11,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-02-15 12:50:11,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-02-15 12:50:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-02-15 12:50:12,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-02-15 12:50:27,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2023-02-15 12:50:27,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 109 [2023-02-15 12:50:40,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 99 [2023-02-15 12:50:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 12:50:41,023 INFO L328 TraceCheckSpWp]: Computing backward predicates...