./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 3dbbec33 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-?-3dbbec3 [2023-02-14 13:14:40,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 13:14:40,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 13:14:40,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 13:14:40,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 13:14:40,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 13:14:40,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 13:14:40,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 13:14:40,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 13:14:40,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 13:14:40,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 13:14:40,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 13:14:40,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 13:14:40,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 13:14:40,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 13:14:40,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 13:14:40,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 13:14:40,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 13:14:40,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 13:14:40,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 13:14:40,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 13:14:40,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 13:14:40,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 13:14:40,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 13:14:40,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 13:14:40,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 13:14:40,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 13:14:40,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 13:14:40,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 13:14:40,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 13:14:40,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 13:14:40,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 13:14:40,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 13:14:40,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 13:14:40,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 13:14:40,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 13:14:40,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 13:14:40,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 13:14:40,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 13:14:40,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 13:14:40,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 13:14:40,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-14 13:14:40,098 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 13:14:40,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 13:14:40,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 13:14:40,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 13:14:40,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 13:14:40,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 13:14:40,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 13:14:40,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 13:14:40,101 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 13:14:40,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-14 13:14:40,102 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-14 13:14:40,103 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-14 13:14:40,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 13:14:40,104 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-14 13:14:40,104 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 13:14:40,107 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 13:14:40,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 13:14:40,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 13:14:40,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 13:14:40,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:14:40,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 13:14:40,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 13:14:40,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 13:14:40,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 13:14:40,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 13:14:40,110 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 13:14:40,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 13:14:40,110 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 13:14:40,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-02-14 13:14:40,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 13:14:40,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 13:14:40,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 13:14:40,316 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 13:14:40,316 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 13:14:40,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-02-14 13:14:41,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 13:14:41,398 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 13:14:41,399 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-02-14 13:14:41,403 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42eb1ace7/d7eca6dd124a43ccb6bd86556a474f8f/FLAGbe39ebfff [2023-02-14 13:14:41,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42eb1ace7/d7eca6dd124a43ccb6bd86556a474f8f [2023-02-14 13:14:41,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 13:14:41,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 13:14:41,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 13:14:41,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 13:14:41,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 13:14:41,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:14:41" (1/1) ... [2023-02-14 13:14:41,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1a0c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:41, skipping insertion in model container [2023-02-14 13:14:41,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:14:41" (1/1) ... [2023-02-14 13:14:41,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 13:14:41,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 13:14:41,966 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] [2023-02-14 13:14:41,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:14:41,989 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 13:14:41,996 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] [2023-02-14 13:14:42,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 13:14:42,013 INFO L208 MainTranslator]: Completed translation [2023-02-14 13:14:42,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42 WrapperNode [2023-02-14 13:14:42,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 13:14:42,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 13:14:42,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 13:14:42,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 13:14:42,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,039 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2023-02-14 13:14:42,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 13:14:42,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 13:14:42,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 13:14:42,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 13:14:42,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,058 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 13:14:42,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 13:14:42,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 13:14:42,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 13:14:42,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (1/1) ... [2023-02-14 13:14:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 13:14:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:42,083 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) [2023-02-14 13:14:42,087 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 [2023-02-14 13:14:42,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 13:14:42,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 13:14:42,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 13:14:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 13:14:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 13:14:42,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 13:14:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 13:14:42,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 13:14:42,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 13:14:42,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-02-14 13:14:42,111 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-02-14 13:14:42,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 13:14:42,209 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 13:14:42,210 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 13:14:42,471 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 13:14:42,475 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 13:14:42,475 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-14 13:14:42,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:14:42 BoogieIcfgContainer [2023-02-14 13:14:42,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 13:14:42,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 13:14:42,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 13:14:42,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 13:14:42,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:14:41" (1/3) ... [2023-02-14 13:14:42,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9cb16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:14:42, skipping insertion in model container [2023-02-14 13:14:42,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:14:42" (2/3) ... [2023-02-14 13:14:42,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9cb16e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:14:42, skipping insertion in model container [2023-02-14 13:14:42,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:14:42" (3/3) ... [2023-02-14 13:14:42,483 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-02-14 13:14:42,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 13:14:42,496 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-02-14 13:14:42,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 13:14:42,540 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;@43c05178, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 13:14:42,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-02-14 13:14:42,543 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) [2023-02-14 13:14:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:14:42,549 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:42,550 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] [2023-02-14 13:14:42,550 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)] === [2023-02-14 13:14:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1116940539, now seen corresponding path program 1 times [2023-02-14 13:14:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384307302] [2023-02-14 13:14:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:42,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:42,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:42,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:42,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:42,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:42,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384307302] [2023-02-14 13:14:42,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384307302] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:42,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:42,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 13:14:42,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928903246] [2023-02-14 13:14:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 13:14:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 13:14:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 13:14:42,810 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) [2023-02-14 13:14:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:42,894 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-02-14 13:14:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 13:14:42,896 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 [2023-02-14 13:14:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:42,903 INFO L225 Difference]: With dead ends: 102 [2023-02-14 13:14:42,903 INFO L226 Difference]: Without dead ends: 100 [2023-02-14 13:14:42,904 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 [2023-02-14 13:14:42,910 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:42,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:14:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-14 13:14:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-14 13:14:42,942 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) [2023-02-14 13:14:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-02-14 13:14:42,946 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 29 [2023-02-14 13:14:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:42,946 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-02-14 13:14:42,947 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) [2023-02-14 13:14:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-02-14 13:14:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:14:42,948 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:42,948 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] [2023-02-14 13:14:42,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 13:14:42,949 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)] === [2023-02-14 13:14:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:42,950 INFO L85 PathProgramCache]: Analyzing trace with hash 236420795, now seen corresponding path program 1 times [2023-02-14 13:14:42,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:42,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661423745] [2023-02-14 13:14:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:42,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:43,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661423745] [2023-02-14 13:14:43,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661423745] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:43,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:43,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:14:43,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386182687] [2023-02-14 13:14:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:43,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:14:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:14:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:14:43,243 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) [2023-02-14 13:14:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:43,352 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-02-14 13:14:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:14:43,352 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 [2023-02-14 13:14:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:43,353 INFO L225 Difference]: With dead ends: 98 [2023-02-14 13:14:43,353 INFO L226 Difference]: Without dead ends: 98 [2023-02-14 13:14:43,354 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 [2023-02-14 13:14:43,354 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 [2023-02-14 13:14:43,355 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] [2023-02-14 13:14:43,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-14 13:14:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-02-14 13:14:43,359 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) [2023-02-14 13:14:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-02-14 13:14:43,360 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 29 [2023-02-14 13:14:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:43,361 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-02-14 13:14:43,361 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) [2023-02-14 13:14:43,361 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-02-14 13:14:43,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-14 13:14:43,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:43,362 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] [2023-02-14 13:14:43,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 13:14:43,362 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)] === [2023-02-14 13:14:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash 236420796, now seen corresponding path program 1 times [2023-02-14 13:14:43,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:43,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655221411] [2023-02-14 13:14:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:43,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:43,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655221411] [2023-02-14 13:14:43,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655221411] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:43,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:43,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-14 13:14:43,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039114725] [2023-02-14 13:14:43,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:43,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:14:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:43,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:14:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:14:43,925 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) [2023-02-14 13:14:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:44,709 INFO L93 Difference]: Finished difference Result 260 states and 282 transitions. [2023-02-14 13:14:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:14:44,709 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 [2023-02-14 13:14:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:44,710 INFO L225 Difference]: With dead ends: 260 [2023-02-14 13:14:44,710 INFO L226 Difference]: Without dead ends: 260 [2023-02-14 13:14:44,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2023-02-14 13:14:44,711 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 915 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:44,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 516 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:14:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-14 13:14:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2023-02-14 13:14:44,727 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) [2023-02-14 13:14:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2023-02-14 13:14:44,730 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 29 [2023-02-14 13:14:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:44,730 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2023-02-14 13:14:44,731 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) [2023-02-14 13:14:44,732 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2023-02-14 13:14:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 13:14:44,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:44,733 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] [2023-02-14 13:14:44,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 13:14:44,733 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)] === [2023-02-14 13:14:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:44,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889940, now seen corresponding path program 1 times [2023-02-14 13:14:44,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:44,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841539938] [2023-02-14 13:14:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:44,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:44,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:44,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:44,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:44,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841539938] [2023-02-14 13:14:44,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841539938] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:44,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:44,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:14:44,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70961387] [2023-02-14 13:14:44,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:44,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:14:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:14:44,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:14:44,841 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) [2023-02-14 13:14:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:44,902 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2023-02-14 13:14:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:14:44,902 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 [2023-02-14 13:14:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:44,904 INFO L225 Difference]: With dead ends: 147 [2023-02-14 13:14:44,904 INFO L226 Difference]: Without dead ends: 147 [2023-02-14 13:14:44,904 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 [2023-02-14 13:14:44,905 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-02-14 13:14:44,905 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] [2023-02-14 13:14:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-14 13:14:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2023-02-14 13:14:44,920 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) [2023-02-14 13:14:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2023-02-14 13:14:44,921 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2023-02-14 13:14:44,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:44,921 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2023-02-14 13:14:44,921 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) [2023-02-14 13:14:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2023-02-14 13:14:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 13:14:44,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:44,922 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] [2023-02-14 13:14:44,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 13:14:44,923 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)] === [2023-02-14 13:14:44,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889939, now seen corresponding path program 1 times [2023-02-14 13:14:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992557103] [2023-02-14 13:14:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:44,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:45,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992557103] [2023-02-14 13:14:45,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992557103] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:45,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:45,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:14:45,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811948815] [2023-02-14 13:14:45,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:45,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:14:45,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:14:45,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:14:45,110 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) [2023-02-14 13:14:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:45,393 INFO L93 Difference]: Finished difference Result 257 states and 334 transitions. [2023-02-14 13:14:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:14:45,393 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 [2023-02-14 13:14:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:45,394 INFO L225 Difference]: With dead ends: 257 [2023-02-14 13:14:45,394 INFO L226 Difference]: Without dead ends: 257 [2023-02-14 13:14:45,395 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 [2023-02-14 13:14:45,395 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 [2023-02-14 13:14:45,396 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] [2023-02-14 13:14:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-02-14 13:14:45,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 147. [2023-02-14 13:14:45,400 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) [2023-02-14 13:14:45,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2023-02-14 13:14:45,401 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2023-02-14 13:14:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:45,401 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2023-02-14 13:14:45,402 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) [2023-02-14 13:14:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2023-02-14 13:14:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 13:14:45,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:45,403 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] [2023-02-14 13:14:45,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 13:14:45,403 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)] === [2023-02-14 13:14:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1311333523, now seen corresponding path program 1 times [2023-02-14 13:14:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488443705] [2023-02-14 13:14:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:14:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:14:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:14:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:45,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:45,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488443705] [2023-02-14 13:14:45,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488443705] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:45,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246001203] [2023-02-14 13:14:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:45,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:45,828 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) [2023-02-14 13:14:45,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 13:14:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 13:14:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:46,056 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 [2023-02-14 13:14:46,063 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 [2023-02-14 13:14:46,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 13:14:46,202 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 [2023-02-14 13:14:46,211 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:14:46,212 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 [2023-02-14 13:14:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:14:46,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:48,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246001203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:48,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:14:48,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-02-14 13:14:48,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209792667] [2023-02-14 13:14:48,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:14:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:48,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:14:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:14:48,672 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) [2023-02-14 13:14:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:49,860 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2023-02-14 13:14:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 13:14:49,860 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 [2023-02-14 13:14:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:49,861 INFO L225 Difference]: With dead ends: 225 [2023-02-14 13:14:49,861 INFO L226 Difference]: Without dead ends: 225 [2023-02-14 13:14:49,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 13:14:49,862 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1200 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:49,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 649 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 13:14:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-02-14 13:14:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 150. [2023-02-14 13:14:49,866 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) [2023-02-14 13:14:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2023-02-14 13:14:49,867 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 30 [2023-02-14 13:14:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:49,867 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2023-02-14 13:14:49,867 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) [2023-02-14 13:14:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2023-02-14 13:14:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-14 13:14:49,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:49,868 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] [2023-02-14 13:14:49,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 13:14:50,072 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 [2023-02-14 13:14:50,073 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)] === [2023-02-14 13:14:50,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:50,074 INFO L85 PathProgramCache]: Analyzing trace with hash -535927024, now seen corresponding path program 1 times [2023-02-14 13:14:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:50,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775936406] [2023-02-14 13:14:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:50,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775936406] [2023-02-14 13:14:50,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775936406] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:50,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:14:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062245761] [2023-02-14 13:14:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:50,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:14:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:14:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:14:50,159 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) [2023-02-14 13:14:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:50,270 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2023-02-14 13:14:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 13:14:50,270 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 [2023-02-14 13:14:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:50,271 INFO L225 Difference]: With dead ends: 246 [2023-02-14 13:14:50,271 INFO L226 Difference]: Without dead ends: 246 [2023-02-14 13:14:50,272 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 [2023-02-14 13:14:50,272 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 [2023-02-14 13:14:50,272 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] [2023-02-14 13:14:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-14 13:14:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2023-02-14 13:14:50,275 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) [2023-02-14 13:14:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2023-02-14 13:14:50,276 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 32 [2023-02-14 13:14:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:50,276 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2023-02-14 13:14:50,276 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) [2023-02-14 13:14:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2023-02-14 13:14:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 13:14:50,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:50,293 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] [2023-02-14 13:14:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 13:14:50,294 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)] === [2023-02-14 13:14:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 566089799, now seen corresponding path program 1 times [2023-02-14 13:14:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:50,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286559917] [2023-02-14 13:14:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:50,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:50,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286559917] [2023-02-14 13:14:50,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286559917] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:50,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:50,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 13:14:50,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867281439] [2023-02-14 13:14:50,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:50,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 13:14:50,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 13:14:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 13:14:50,360 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) [2023-02-14 13:14:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:50,444 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2023-02-14 13:14:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 13:14:50,445 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 [2023-02-14 13:14:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:50,445 INFO L225 Difference]: With dead ends: 138 [2023-02-14 13:14:50,446 INFO L226 Difference]: Without dead ends: 138 [2023-02-14 13:14:50,446 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 [2023-02-14 13:14:50,446 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 [2023-02-14 13:14:50,447 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] [2023-02-14 13:14:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-14 13:14:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-02-14 13:14:50,449 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) [2023-02-14 13:14:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2023-02-14 13:14:50,449 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 33 [2023-02-14 13:14:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:50,450 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2023-02-14 13:14:50,450 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) [2023-02-14 13:14:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2023-02-14 13:14:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-14 13:14:50,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:50,451 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] [2023-02-14 13:14:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 13:14:50,451 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)] === [2023-02-14 13:14:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash 566089800, now seen corresponding path program 1 times [2023-02-14 13:14:50,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710587805] [2023-02-14 13:14:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:50,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 13:14:50,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:50,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710587805] [2023-02-14 13:14:50,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710587805] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:50,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:50,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-14 13:14:50,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763737244] [2023-02-14 13:14:50,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:50,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:14:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:14:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:14:50,579 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) [2023-02-14 13:14:50,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:50,738 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2023-02-14 13:14:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 13:14:50,758 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 [2023-02-14 13:14:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:50,758 INFO L225 Difference]: With dead ends: 178 [2023-02-14 13:14:50,758 INFO L226 Difference]: Without dead ends: 178 [2023-02-14 13:14:50,759 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 [2023-02-14 13:14:50,759 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 [2023-02-14 13:14:50,759 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] [2023-02-14 13:14:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-14 13:14:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 107. [2023-02-14 13:14:50,761 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) [2023-02-14 13:14:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2023-02-14 13:14:50,762 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 33 [2023-02-14 13:14:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:50,762 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2023-02-14 13:14:50,762 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) [2023-02-14 13:14:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2023-02-14 13:14:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 13:14:50,762 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:50,762 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] [2023-02-14 13:14:50,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 13:14:50,763 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)] === [2023-02-14 13:14:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash -491610599, now seen corresponding path program 1 times [2023-02-14 13:14:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:50,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566292134] [2023-02-14 13:14:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:50,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:50,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566292134] [2023-02-14 13:14:50,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566292134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:50,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720775923] [2023-02-14 13:14:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:50,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:50,993 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) [2023-02-14 13:14:50,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 13:14:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 13:14:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:51,068 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 [2023-02-14 13:14:51,585 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-02-14 13:14:51,586 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 [2023-02-14 13:14:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:51,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:52,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720775923] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:52,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:14:52,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2023-02-14 13:14:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095844047] [2023-02-14 13:14:52,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:52,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 13:14:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 13:14:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=308, Unknown=1, NotChecked=0, Total=380 [2023-02-14 13:14:52,127 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) [2023-02-14 13:14:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:52,741 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2023-02-14 13:14:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:14:52,742 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 [2023-02-14 13:14:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:52,742 INFO L225 Difference]: With dead ends: 107 [2023-02-14 13:14:52,742 INFO L226 Difference]: Without dead ends: 107 [2023-02-14 13:14:52,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=132, Invalid=467, Unknown=1, NotChecked=0, Total=600 [2023-02-14 13:14:52,743 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 313 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:52,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 241 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:14:52,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-14 13:14:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2023-02-14 13:14:52,745 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) [2023-02-14 13:14:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2023-02-14 13:14:52,745 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 35 [2023-02-14 13:14:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:52,745 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2023-02-14 13:14:52,745 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) [2023-02-14 13:14:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2023-02-14 13:14:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 13:14:52,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:52,746 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] [2023-02-14 13:14:52,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 13:14:52,951 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 [2023-02-14 13:14:52,952 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)] === [2023-02-14 13:14:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 7143804, now seen corresponding path program 1 times [2023-02-14 13:14:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:52,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110274445] [2023-02-14 13:14:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:53,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110274445] [2023-02-14 13:14:53,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110274445] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:53,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:53,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:14:53,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958840012] [2023-02-14 13:14:53,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:53,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:14:53,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:53,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:14:53,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:14:53,034 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) [2023-02-14 13:14:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:53,084 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-02-14 13:14:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:14:53,084 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 [2023-02-14 13:14:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:53,085 INFO L225 Difference]: With dead ends: 101 [2023-02-14 13:14:53,085 INFO L226 Difference]: Without dead ends: 101 [2023-02-14 13:14:53,085 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 [2023-02-14 13:14:53,086 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:53,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 162 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 13:14:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-14 13:14:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-02-14 13:14:53,088 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) [2023-02-14 13:14:53,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2023-02-14 13:14:53,089 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 37 [2023-02-14 13:14:53,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:53,089 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2023-02-14 13:14:53,089 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) [2023-02-14 13:14:53,089 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2023-02-14 13:14:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 13:14:53,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:53,091 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] [2023-02-14 13:14:53,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 13:14:53,091 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)] === [2023-02-14 13:14:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash 7143805, now seen corresponding path program 1 times [2023-02-14 13:14:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072294019] [2023-02-14 13:14:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072294019] [2023-02-14 13:14:53,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072294019] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:53,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265423474] [2023-02-14 13:14:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:53,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:53,185 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) [2023-02-14 13:14:53,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 13:14:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 13:14:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:53,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:53,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265423474] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:14:53,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:14:53,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-02-14 13:14:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026803392] [2023-02-14 13:14:53,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:14:53,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:14:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:14:53,313 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) [2023-02-14 13:14:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:53,447 INFO L93 Difference]: Finished difference Result 227 states and 247 transitions. [2023-02-14 13:14:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:14:53,448 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 [2023-02-14 13:14:53,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:53,449 INFO L225 Difference]: With dead ends: 227 [2023-02-14 13:14:53,449 INFO L226 Difference]: Without dead ends: 227 [2023-02-14 13:14:53,449 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 [2023-02-14 13:14:53,449 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 [2023-02-14 13:14:53,449 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] [2023-02-14 13:14:53,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-02-14 13:14:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 107. [2023-02-14 13:14:53,451 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) [2023-02-14 13:14:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2023-02-14 13:14:53,452 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 37 [2023-02-14 13:14:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:53,452 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2023-02-14 13:14:53,452 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) [2023-02-14 13:14:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2023-02-14 13:14:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 13:14:53,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:53,452 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] [2023-02-14 13:14:53,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 13:14:53,657 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 [2023-02-14 13:14:53,657 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)] === [2023-02-14 13:14:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash 221416284, now seen corresponding path program 1 times [2023-02-14 13:14:53,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:53,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478456448] [2023-02-14 13:14:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:53,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478456448] [2023-02-14 13:14:53,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478456448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688808425] [2023-02-14 13:14:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:53,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:53,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:53,928 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) [2023-02-14 13:14:53,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 13:14:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:53,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 13:14:53,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:54,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:54,272 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 [2023-02-14 13:14:54,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:54,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688808425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:14:54,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:14:54,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2023-02-14 13:14:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824828793] [2023-02-14 13:14:54,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:54,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 13:14:54,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 13:14:54,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-02-14 13:14:54,348 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) [2023-02-14 13:14:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:55,003 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2023-02-14 13:14:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:14:55,003 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 [2023-02-14 13:14:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:55,004 INFO L225 Difference]: With dead ends: 169 [2023-02-14 13:14:55,004 INFO L226 Difference]: Without dead ends: 169 [2023-02-14 13:14:55,005 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 [2023-02-14 13:14:55,005 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 [2023-02-14 13:14:55,005 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] [2023-02-14 13:14:55,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-14 13:14:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2023-02-14 13:14:55,007 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) [2023-02-14 13:14:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2023-02-14 13:14:55,008 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 38 [2023-02-14 13:14:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:55,008 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2023-02-14 13:14:55,008 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) [2023-02-14 13:14:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2023-02-14 13:14:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 13:14:55,008 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:55,008 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] [2023-02-14 13:14:55,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 13:14:55,216 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 [2023-02-14 13:14:55,216 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)] === [2023-02-14 13:14:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:55,217 INFO L85 PathProgramCache]: Analyzing trace with hash -311817583, now seen corresponding path program 2 times [2023-02-14 13:14:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:55,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810783743] [2023-02-14 13:14:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:55,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:55,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:55,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:55,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:55,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:55,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810783743] [2023-02-14 13:14:55,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810783743] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:55,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051764406] [2023-02-14 13:14:55,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:14:55,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:55,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:55,382 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) [2023-02-14 13:14:55,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 13:14:55,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:14:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:14:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:14:55,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:55,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:55,614 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 [2023-02-14 13:14:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:55,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051764406] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:14:55,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:14:55,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2023-02-14 13:14:55,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146969781] [2023-02-14 13:14:55,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:55,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 13:14:55,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:55,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 13:14:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-02-14 13:14:55,678 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) [2023-02-14 13:14:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:56,266 INFO L93 Difference]: Finished difference Result 375 states and 406 transitions. [2023-02-14 13:14:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 13:14:56,267 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 [2023-02-14 13:14:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:56,268 INFO L225 Difference]: With dead ends: 375 [2023-02-14 13:14:56,268 INFO L226 Difference]: Without dead ends: 375 [2023-02-14 13:14:56,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 13:14:56,269 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:56,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 636 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 13:14:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-02-14 13:14:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 118. [2023-02-14 13:14:56,272 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) [2023-02-14 13:14:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-02-14 13:14:56,273 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 42 [2023-02-14 13:14:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:56,273 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-02-14 13:14:56,273 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) [2023-02-14 13:14:56,273 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2023-02-14 13:14:56,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 13:14:56,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:56,274 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] [2023-02-14 13:14:56,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 13:14:56,486 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 [2023-02-14 13:14:56,487 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)] === [2023-02-14 13:14:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash -804107195, now seen corresponding path program 1 times [2023-02-14 13:14:56,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:56,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488759699] [2023-02-14 13:14:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:56,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:56,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:56,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:56,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:56,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488759699] [2023-02-14 13:14:56,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488759699] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:56,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715984343] [2023-02-14 13:14:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:56,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:56,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:56,570 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) [2023-02-14 13:14:56,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 13:14:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 13:14:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:56,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:56,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715984343] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:14:56,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:14:56,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2023-02-14 13:14:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353217597] [2023-02-14 13:14:56,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:56,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:14:56,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:14:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:14:56,696 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) [2023-02-14 13:14:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:56,895 INFO L93 Difference]: Finished difference Result 319 states and 357 transitions. [2023-02-14 13:14:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:14:56,895 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 [2023-02-14 13:14:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:56,897 INFO L225 Difference]: With dead ends: 319 [2023-02-14 13:14:56,897 INFO L226 Difference]: Without dead ends: 319 [2023-02-14 13:14:56,899 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 [2023-02-14 13:14:56,899 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 [2023-02-14 13:14:56,900 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] [2023-02-14 13:14:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-14 13:14:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 125. [2023-02-14 13:14:56,905 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) [2023-02-14 13:14:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2023-02-14 13:14:56,905 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 42 [2023-02-14 13:14:56,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:56,906 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2023-02-14 13:14:56,906 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) [2023-02-14 13:14:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-02-14 13:14:56,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:14:56,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:56,906 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] [2023-02-14 13:14:56,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 13:14:57,112 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 [2023-02-14 13:14:57,113 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)] === [2023-02-14 13:14:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1076410474, now seen corresponding path program 1 times [2023-02-14 13:14:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:57,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469450605] [2023-02-14 13:14:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:57,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:57,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:57,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:57,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:57,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469450605] [2023-02-14 13:14:57,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469450605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:57,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443439762] [2023-02-14 13:14:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:57,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:57,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:57,305 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) [2023-02-14 13:14:57,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 13:14:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-14 13:14:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:57,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:57,580 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 [2023-02-14 13:14:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:57,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443439762] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:14:57,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:14:57,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-02-14 13:14:57,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649728465] [2023-02-14 13:14:57,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:57,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 13:14:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 13:14:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-02-14 13:14:57,666 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) [2023-02-14 13:14:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:58,302 INFO L93 Difference]: Finished difference Result 311 states and 345 transitions. [2023-02-14 13:14:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 13:14:58,302 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 [2023-02-14 13:14:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:58,303 INFO L225 Difference]: With dead ends: 311 [2023-02-14 13:14:58,303 INFO L226 Difference]: Without dead ends: 311 [2023-02-14 13:14:58,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2023-02-14 13:14:58,304 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1017 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:58,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1017 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:14:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-14 13:14:58,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 125. [2023-02-14 13:14:58,307 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) [2023-02-14 13:14:58,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2023-02-14 13:14:58,307 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 43 [2023-02-14 13:14:58,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:58,307 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2023-02-14 13:14:58,307 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) [2023-02-14 13:14:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2023-02-14 13:14:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:14:58,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:58,308 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] [2023-02-14 13:14:58,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 13:14:58,513 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 [2023-02-14 13:14:58,513 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)] === [2023-02-14 13:14:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:58,514 INFO L85 PathProgramCache]: Analyzing trace with hash 842447236, now seen corresponding path program 1 times [2023-02-14 13:14:58,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:58,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201075768] [2023-02-14 13:14:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:58,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201075768] [2023-02-14 13:14:58,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201075768] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:14:58,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:14:58,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:14:58,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919024115] [2023-02-14 13:14:58,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:14:58,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:14:58,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:58,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:14:58,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:14:58,596 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) [2023-02-14 13:14:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:58,643 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2023-02-14 13:14:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:14:58,644 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 [2023-02-14 13:14:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:58,644 INFO L225 Difference]: With dead ends: 124 [2023-02-14 13:14:58,644 INFO L226 Difference]: Without dead ends: 124 [2023-02-14 13:14:58,645 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 [2023-02-14 13:14:58,645 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 [2023-02-14 13:14:58,645 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] [2023-02-14 13:14:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-14 13:14:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-02-14 13:14:58,648 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) [2023-02-14 13:14:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2023-02-14 13:14:58,648 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 43 [2023-02-14 13:14:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:58,648 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2023-02-14 13:14:58,649 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) [2023-02-14 13:14:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2023-02-14 13:14:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 13:14:58,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:58,649 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] [2023-02-14 13:14:58,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-14 13:14:58,649 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)] === [2023-02-14 13:14:58,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash 842447237, now seen corresponding path program 1 times [2023-02-14 13:14:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:58,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834790292] [2023-02-14 13:14:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:58,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:58,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:58,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834790292] [2023-02-14 13:14:58,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834790292] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356082901] [2023-02-14 13:14:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:58,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:58,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:14:58,857 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) [2023-02-14 13:14:58,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 13:14:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 13:14:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:14:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:59,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:14:59,086 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 [2023-02-14 13:14:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:59,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356082901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:14:59,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:14:59,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2023-02-14 13:14:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958291807] [2023-02-14 13:14:59,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:14:59,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 13:14:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:14:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 13:14:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-14 13:14:59,128 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) [2023-02-14 13:14:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:14:59,669 INFO L93 Difference]: Finished difference Result 246 states and 279 transitions. [2023-02-14 13:14:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 13:14:59,670 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 [2023-02-14 13:14:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:14:59,672 INFO L225 Difference]: With dead ends: 246 [2023-02-14 13:14:59,672 INFO L226 Difference]: Without dead ends: 246 [2023-02-14 13:14:59,672 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 [2023-02-14 13:14:59,672 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:14:59,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 379 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:14:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-14 13:14:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2023-02-14 13:14:59,686 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) [2023-02-14 13:14:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2023-02-14 13:14:59,687 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 43 [2023-02-14 13:14:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:14:59,687 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2023-02-14 13:14:59,688 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) [2023-02-14 13:14:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2023-02-14 13:14:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 13:14:59,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:14:59,688 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] [2023-02-14 13:14:59,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 13:14:59,893 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 [2023-02-14 13:14:59,893 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)] === [2023-02-14 13:14:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:14:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2137907964, now seen corresponding path program 1 times [2023-02-14 13:14:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:14:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793483679] [2023-02-14 13:14:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:14:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:14:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:59,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:14:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:59,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:14:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:59,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:14:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:14:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:14:59,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:14:59,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793483679] [2023-02-14 13:14:59,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793483679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:14:59,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991524402] [2023-02-14 13:14:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:14:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:14:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:00,010 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) [2023-02-14 13:15:00,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 13:15:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 13:15:00,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:00,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991524402] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:00,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:00,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-02-14 13:15:00,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921556466] [2023-02-14 13:15:00,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 13:15:00,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 13:15:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-14 13:15:00,165 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) [2023-02-14 13:15:00,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:00,326 INFO L93 Difference]: Finished difference Result 222 states and 255 transitions. [2023-02-14 13:15:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 13:15:00,327 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 [2023-02-14 13:15:00,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:00,328 INFO L225 Difference]: With dead ends: 222 [2023-02-14 13:15:00,328 INFO L226 Difference]: Without dead ends: 222 [2023-02-14 13:15:00,328 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 [2023-02-14 13:15:00,328 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 [2023-02-14 13:15:00,328 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] [2023-02-14 13:15:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-02-14 13:15:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 126. [2023-02-14 13:15:00,331 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) [2023-02-14 13:15:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2023-02-14 13:15:00,332 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 45 [2023-02-14 13:15:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:00,332 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2023-02-14 13:15:00,333 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) [2023-02-14 13:15:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2023-02-14 13:15:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:15:00,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:00,333 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] [2023-02-14 13:15:00,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:00,537 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 [2023-02-14 13:15:00,538 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)] === [2023-02-14 13:15:00,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:00,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1164235796, now seen corresponding path program 1 times [2023-02-14 13:15:00,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843253660] [2023-02-14 13:15:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:00,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:00,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843253660] [2023-02-14 13:15:00,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843253660] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513465791] [2023-02-14 13:15:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:00,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:00,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:00,657 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) [2023-02-14 13:15:00,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 13:15:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 13:15:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:00,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:00,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513465791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:00,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:00,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2023-02-14 13:15:00,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798810092] [2023-02-14 13:15:00,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:00,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-14 13:15:00,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:00,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-14 13:15:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-02-14 13:15:00,840 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) [2023-02-14 13:15:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:01,274 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2023-02-14 13:15:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-14 13:15:01,275 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 [2023-02-14 13:15:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:01,276 INFO L225 Difference]: With dead ends: 336 [2023-02-14 13:15:01,276 INFO L226 Difference]: Without dead ends: 336 [2023-02-14 13:15:01,276 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 [2023-02-14 13:15:01,277 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:01,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1354 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:15:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-02-14 13:15:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 127. [2023-02-14 13:15:01,280 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) [2023-02-14 13:15:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2023-02-14 13:15:01,283 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 46 [2023-02-14 13:15:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:01,283 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2023-02-14 13:15:01,283 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) [2023-02-14 13:15:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2023-02-14 13:15:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 13:15:01,284 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:01,284 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] [2023-02-14 13:15:01,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:01,488 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 [2023-02-14 13:15:01,489 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)] === [2023-02-14 13:15:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1851808460, now seen corresponding path program 1 times [2023-02-14 13:15:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:01,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405800302] [2023-02-14 13:15:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:01,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:01,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:01,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:01,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:01,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405800302] [2023-02-14 13:15:01,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405800302] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:01,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471612771] [2023-02-14 13:15:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:01,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:01,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:01,854 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) [2023-02-14 13:15:01,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 13:15:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 13:15:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:01,977 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 [2023-02-14 13:15:02,009 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 [2023-02-14 13:15:02,062 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:15:02,062 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 [2023-02-14 13:15:02,084 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 [2023-02-14 13:15:02,088 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 [2023-02-14 13:15:02,117 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 [2023-02-14 13:15:02,160 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 [2023-02-14 13:15:02,204 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 [2023-02-14 13:15:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-02-14 13:15:02,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:22,325 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 [2023-02-14 13:15:22,489 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 [2023-02-14 13:15:24,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471612771] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:24,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 13:15:24,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2023-02-14 13:15:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018958260] [2023-02-14 13:15:24,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:24,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:15:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:15:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=953, Unknown=21, NotChecked=192, Total=1260 [2023-02-14 13:15:24,552 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) [2023-02-14 13:15:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:26,659 INFO L93 Difference]: Finished difference Result 268 states and 295 transitions. [2023-02-14 13:15:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-14 13:15:26,660 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 [2023-02-14 13:15:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:26,660 INFO L225 Difference]: With dead ends: 268 [2023-02-14 13:15:26,660 INFO L226 Difference]: Without dead ends: 268 [2023-02-14 13:15:26,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=882, Invalid=4507, Unknown=25, NotChecked=438, Total=5852 [2023-02-14 13:15:26,662 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1283 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:26,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 1283 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1370 Invalid, 0 Unknown, 171 Unchecked, 0.6s Time] [2023-02-14 13:15:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-14 13:15:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 132. [2023-02-14 13:15:26,666 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) [2023-02-14 13:15:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2023-02-14 13:15:26,666 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 46 [2023-02-14 13:15:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:26,667 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2023-02-14 13:15:26,667 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) [2023-02-14 13:15:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2023-02-14 13:15:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:15:26,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:26,668 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] [2023-02-14 13:15:26,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:26,872 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 [2023-02-14 13:15:26,873 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)] === [2023-02-14 13:15:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:26,873 INFO L85 PathProgramCache]: Analyzing trace with hash -316520070, now seen corresponding path program 1 times [2023-02-14 13:15:26,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:26,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719026596] [2023-02-14 13:15:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:26,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:26,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:26,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:27,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:27,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719026596] [2023-02-14 13:15:27,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719026596] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:27,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550451020] [2023-02-14 13:15:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:27,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:27,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:27,022 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) [2023-02-14 13:15:27,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 13:15:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:15:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:27,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:27,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550451020] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:27,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:27,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-02-14 13:15:27,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141256469] [2023-02-14 13:15:27,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:27,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 13:15:27,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:27,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 13:15:27,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-02-14 13:15:27,235 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) [2023-02-14 13:15:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:27,603 INFO L93 Difference]: Finished difference Result 392 states and 429 transitions. [2023-02-14 13:15:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:15:27,604 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 [2023-02-14 13:15:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:27,605 INFO L225 Difference]: With dead ends: 392 [2023-02-14 13:15:27,605 INFO L226 Difference]: Without dead ends: 392 [2023-02-14 13:15:27,605 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 [2023-02-14 13:15:27,606 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1160 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-14 13:15:27,606 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] [2023-02-14 13:15:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-02-14 13:15:27,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 157. [2023-02-14 13:15:27,609 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) [2023-02-14 13:15:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2023-02-14 13:15:27,609 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2023-02-14 13:15:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:27,609 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2023-02-14 13:15:27,609 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) [2023-02-14 13:15:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2023-02-14 13:15:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:15:27,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:27,610 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] [2023-02-14 13:15:27,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:27,814 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 [2023-02-14 13:15:27,815 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)] === [2023-02-14 13:15:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491564, now seen corresponding path program 1 times [2023-02-14 13:15:27,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:27,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562720147] [2023-02-14 13:15:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:27,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:27,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562720147] [2023-02-14 13:15:27,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562720147] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:15:27,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:15:27,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:15:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867829999] [2023-02-14 13:15:27,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:15:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:15:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:15:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:15:27,887 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) [2023-02-14 13:15:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:27,940 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2023-02-14 13:15:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:15:27,940 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 [2023-02-14 13:15:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:27,942 INFO L225 Difference]: With dead ends: 156 [2023-02-14 13:15:27,942 INFO L226 Difference]: Without dead ends: 156 [2023-02-14 13:15:27,942 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 [2023-02-14 13:15:27,942 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 [2023-02-14 13:15:27,942 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] [2023-02-14 13:15:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-14 13:15:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-02-14 13:15:27,945 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) [2023-02-14 13:15:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2023-02-14 13:15:27,946 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 47 [2023-02-14 13:15:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:27,946 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2023-02-14 13:15:27,946 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) [2023-02-14 13:15:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2023-02-14 13:15:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 13:15:27,947 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:27,947 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] [2023-02-14 13:15:27,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 13:15:27,947 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)] === [2023-02-14 13:15:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491565, now seen corresponding path program 1 times [2023-02-14 13:15:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:27,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221282633] [2023-02-14 13:15:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:27,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:28,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221282633] [2023-02-14 13:15:28,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221282633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:28,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303720388] [2023-02-14 13:15:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:28,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:28,066 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) [2023-02-14 13:15:28,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 13:15:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 13:15:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:28,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:28,287 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 [2023-02-14 13:15:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303720388] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:28,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:28,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-02-14 13:15:28,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16655457] [2023-02-14 13:15:28,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:28,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 13:15:28,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 13:15:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:15:28,317 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) [2023-02-14 13:15:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:28,482 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2023-02-14 13:15:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:15:28,482 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 [2023-02-14 13:15:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:28,483 INFO L225 Difference]: With dead ends: 164 [2023-02-14 13:15:28,483 INFO L226 Difference]: Without dead ends: 164 [2023-02-14 13:15:28,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-02-14 13:15:28,484 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 [2023-02-14 13:15:28,484 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] [2023-02-14 13:15:28,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-02-14 13:15:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2023-02-14 13:15:28,486 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) [2023-02-14 13:15:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2023-02-14 13:15:28,486 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 47 [2023-02-14 13:15:28,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:28,487 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2023-02-14 13:15:28,487 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) [2023-02-14 13:15:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2023-02-14 13:15:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:15:28,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:28,488 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] [2023-02-14 13:15:28,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:28,688 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 [2023-02-14 13:15:28,689 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)] === [2023-02-14 13:15:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1797796267, now seen corresponding path program 1 times [2023-02-14 13:15:28,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:28,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817794935] [2023-02-14 13:15:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:28,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817794935] [2023-02-14 13:15:28,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817794935] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990303782] [2023-02-14 13:15:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:28,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:28,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:28,842 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) [2023-02-14 13:15:28,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 13:15:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 13:15:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:28,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:29,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990303782] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:29,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:29,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2023-02-14 13:15:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750332696] [2023-02-14 13:15:29,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 13:15:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 13:15:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 13:15:29,038 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) [2023-02-14 13:15:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:29,226 INFO L93 Difference]: Finished difference Result 381 states and 418 transitions. [2023-02-14 13:15:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 13:15:29,226 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 [2023-02-14 13:15:29,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:29,227 INFO L225 Difference]: With dead ends: 381 [2023-02-14 13:15:29,227 INFO L226 Difference]: Without dead ends: 381 [2023-02-14 13:15:29,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-02-14 13:15:29,229 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:29,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 734 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:15:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-14 13:15:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 150. [2023-02-14 13:15:29,235 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) [2023-02-14 13:15:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2023-02-14 13:15:29,235 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 51 [2023-02-14 13:15:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:29,235 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2023-02-14 13:15:29,236 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) [2023-02-14 13:15:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2023-02-14 13:15:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 13:15:29,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:29,237 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] [2023-02-14 13:15:29,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 13:15:29,441 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 [2023-02-14 13:15:29,441 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)] === [2023-02-14 13:15:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:29,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1655469456, now seen corresponding path program 1 times [2023-02-14 13:15:29,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:29,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863623670] [2023-02-14 13:15:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:29,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:29,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:29,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:29,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:29,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:29,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863623670] [2023-02-14 13:15:29,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863623670] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467530947] [2023-02-14 13:15:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:29,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:29,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:29,578 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) [2023-02-14 13:15:29,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 13:15:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:29,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 13:15:29,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:29,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467530947] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:29,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:29,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2023-02-14 13:15:29,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029098976] [2023-02-14 13:15:29,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:29,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 13:15:29,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 13:15:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:15:29,760 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) [2023-02-14 13:15:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:29,908 INFO L93 Difference]: Finished difference Result 262 states and 292 transitions. [2023-02-14 13:15:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 13:15:29,908 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 [2023-02-14 13:15:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:29,909 INFO L225 Difference]: With dead ends: 262 [2023-02-14 13:15:29,909 INFO L226 Difference]: Without dead ends: 262 [2023-02-14 13:15:29,909 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 [2023-02-14 13:15:29,910 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 [2023-02-14 13:15:29,910 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] [2023-02-14 13:15:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-14 13:15:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2023-02-14 13:15:29,912 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) [2023-02-14 13:15:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2023-02-14 13:15:29,913 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 51 [2023-02-14 13:15:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:29,913 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2023-02-14 13:15:29,913 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) [2023-02-14 13:15:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2023-02-14 13:15:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 13:15:29,913 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:29,913 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] [2023-02-14 13:15:29,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-14 13:15:30,118 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 [2023-02-14 13:15:30,118 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)] === [2023-02-14 13:15:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash 772147598, now seen corresponding path program 2 times [2023-02-14 13:15:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280218623] [2023-02-14 13:15:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:30,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:30,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:30,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280218623] [2023-02-14 13:15:30,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280218623] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:30,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66521103] [2023-02-14 13:15:30,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:15:30,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:30,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:30,305 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) [2023-02-14 13:15:30,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 13:15:30,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:15:30,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:15:30,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 13:15:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:30,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:30,639 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 [2023-02-14 13:15:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:30,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66521103] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:30,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:30,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-02-14 13:15:30,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665277990] [2023-02-14 13:15:30,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:15:30,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:15:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-02-14 13:15:30,753 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) [2023-02-14 13:15:31,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:31,389 INFO L93 Difference]: Finished difference Result 282 states and 307 transitions. [2023-02-14 13:15:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 13:15:31,389 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 [2023-02-14 13:15:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:31,390 INFO L225 Difference]: With dead ends: 282 [2023-02-14 13:15:31,390 INFO L226 Difference]: Without dead ends: 282 [2023-02-14 13:15:31,391 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 [2023-02-14 13:15:31,391 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 907 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:31,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1042 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 13:15:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-14 13:15:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 159. [2023-02-14 13:15:31,394 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) [2023-02-14 13:15:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2023-02-14 13:15:31,394 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 52 [2023-02-14 13:15:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:31,394 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2023-02-14 13:15:31,394 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) [2023-02-14 13:15:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2023-02-14 13:15:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 13:15:31,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:31,395 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] [2023-02-14 13:15:31,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:31,600 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 [2023-02-14 13:15:31,600 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)] === [2023-02-14 13:15:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1833228231, now seen corresponding path program 1 times [2023-02-14 13:15:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:31,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452191535] [2023-02-14 13:15:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:31,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:31,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:31,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:31,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452191535] [2023-02-14 13:15:31,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452191535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:31,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574172228] [2023-02-14 13:15:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:31,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:31,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:31,835 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) [2023-02-14 13:15:31,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 13:15:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 13:15:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:32,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574172228] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:32,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:32,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2023-02-14 13:15:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682947024] [2023-02-14 13:15:32,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:32,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 13:15:32,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 13:15:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-02-14 13:15:32,376 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) [2023-02-14 13:15:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:32,890 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2023-02-14 13:15:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 13:15:32,891 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 [2023-02-14 13:15:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:32,892 INFO L225 Difference]: With dead ends: 290 [2023-02-14 13:15:32,892 INFO L226 Difference]: Without dead ends: 290 [2023-02-14 13:15:32,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2023-02-14 13:15:32,893 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 [2023-02-14 13:15:32,893 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] [2023-02-14 13:15:32,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-02-14 13:15:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 194. [2023-02-14 13:15:32,895 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) [2023-02-14 13:15:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 215 transitions. [2023-02-14 13:15:32,896 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 215 transitions. Word has length 53 [2023-02-14 13:15:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:32,896 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 215 transitions. [2023-02-14 13:15:32,896 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) [2023-02-14 13:15:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 215 transitions. [2023-02-14 13:15:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 13:15:32,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:32,897 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] [2023-02-14 13:15:32,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:33,102 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 [2023-02-14 13:15:33,102 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)] === [2023-02-14 13:15:33,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1768212551, now seen corresponding path program 1 times [2023-02-14 13:15:33,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:33,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557820093] [2023-02-14 13:15:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:33,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557820093] [2023-02-14 13:15:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557820093] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:15:33,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:15:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:15:33,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47362678] [2023-02-14 13:15:33,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:15:33,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:15:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:15:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:15:33,180 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) [2023-02-14 13:15:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:33,239 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2023-02-14 13:15:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:15:33,239 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 [2023-02-14 13:15:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:33,240 INFO L225 Difference]: With dead ends: 193 [2023-02-14 13:15:33,240 INFO L226 Difference]: Without dead ends: 193 [2023-02-14 13:15:33,240 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 [2023-02-14 13:15:33,240 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:33,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 13:15:33,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-14 13:15:33,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-14 13:15:33,243 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) [2023-02-14 13:15:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2023-02-14 13:15:33,243 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 53 [2023-02-14 13:15:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:33,244 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2023-02-14 13:15:33,244 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) [2023-02-14 13:15:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2023-02-14 13:15:33,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 13:15:33,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:33,244 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] [2023-02-14 13:15:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-14 13:15:33,245 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)] === [2023-02-14 13:15:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1495879408, now seen corresponding path program 1 times [2023-02-14 13:15:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575562316] [2023-02-14 13:15:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:33,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575562316] [2023-02-14 13:15:33,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575562316] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196382296] [2023-02-14 13:15:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:33,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:33,382 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) [2023-02-14 13:15:33,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 13:15:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 13:15:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:33,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196382296] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:33,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-02-14 13:15:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850206533] [2023-02-14 13:15:33,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 13:15:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 13:15:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-02-14 13:15:33,829 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) [2023-02-14 13:15:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:34,155 INFO L93 Difference]: Finished difference Result 341 states and 377 transitions. [2023-02-14 13:15:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 13:15:34,156 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 [2023-02-14 13:15:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:34,157 INFO L225 Difference]: With dead ends: 341 [2023-02-14 13:15:34,157 INFO L226 Difference]: Without dead ends: 341 [2023-02-14 13:15:34,157 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 [2023-02-14 13:15:34,158 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 [2023-02-14 13:15:34,158 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] [2023-02-14 13:15:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-02-14 13:15:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 203. [2023-02-14 13:15:34,161 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) [2023-02-14 13:15:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 225 transitions. [2023-02-14 13:15:34,162 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 225 transitions. Word has length 54 [2023-02-14 13:15:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:34,162 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 225 transitions. [2023-02-14 13:15:34,162 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) [2023-02-14 13:15:34,163 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 225 transitions. [2023-02-14 13:15:34,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 13:15:34,163 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:34,163 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] [2023-02-14 13:15:34,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-14 13:15:34,363 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 [2023-02-14 13:15:34,364 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)] === [2023-02-14 13:15:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash -953582912, now seen corresponding path program 1 times [2023-02-14 13:15:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218215745] [2023-02-14 13:15:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:34,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:34,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218215745] [2023-02-14 13:15:34,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218215745] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:15:34,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:15:34,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 13:15:34,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405944673] [2023-02-14 13:15:34,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:15:34,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 13:15:34,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:34,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 13:15:34,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 13:15:34,407 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) [2023-02-14 13:15:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:34,455 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2023-02-14 13:15:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 13:15:34,455 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 [2023-02-14 13:15:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:34,456 INFO L225 Difference]: With dead ends: 202 [2023-02-14 13:15:34,457 INFO L226 Difference]: Without dead ends: 202 [2023-02-14 13:15:34,457 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 [2023-02-14 13:15:34,458 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 [2023-02-14 13:15:34,459 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] [2023-02-14 13:15:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-14 13:15:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-02-14 13:15:34,461 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) [2023-02-14 13:15:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2023-02-14 13:15:34,462 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 56 [2023-02-14 13:15:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:34,462 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2023-02-14 13:15:34,462 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) [2023-02-14 13:15:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2023-02-14 13:15:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 13:15:34,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:34,463 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] [2023-02-14 13:15:34,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-14 13:15:34,464 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)] === [2023-02-14 13:15:34,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:34,464 INFO L85 PathProgramCache]: Analyzing trace with hash 841059847, now seen corresponding path program 1 times [2023-02-14 13:15:34,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56953008] [2023-02-14 13:15:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:34,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:34,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:34,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56953008] [2023-02-14 13:15:34,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56953008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:34,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448317187] [2023-02-14 13:15:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:34,701 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) [2023-02-14 13:15:34,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 13:15:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 13:15:34,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:35,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:35,138 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 [2023-02-14 13:15:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448317187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:35,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:35,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-02-14 13:15:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171091753] [2023-02-14 13:15:35,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-14 13:15:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-14 13:15:35,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 13:15:35,470 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) [2023-02-14 13:15:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:38,828 INFO L93 Difference]: Finished difference Result 598 states and 646 transitions. [2023-02-14 13:15:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-14 13:15:38,829 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 [2023-02-14 13:15:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:38,830 INFO L225 Difference]: With dead ends: 598 [2023-02-14 13:15:38,830 INFO L226 Difference]: Without dead ends: 598 [2023-02-14 13:15:38,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1641, Invalid=5841, Unknown=0, NotChecked=0, Total=7482 [2023-02-14 13:15:38,832 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 [2023-02-14 13:15:38,832 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] [2023-02-14 13:15:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-02-14 13:15:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 202. [2023-02-14 13:15:38,836 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) [2023-02-14 13:15:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 225 transitions. [2023-02-14 13:15:38,836 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 225 transitions. Word has length 56 [2023-02-14 13:15:38,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:38,837 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 225 transitions. [2023-02-14 13:15:38,837 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) [2023-02-14 13:15:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 225 transitions. [2023-02-14 13:15:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 13:15:38,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:38,837 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] [2023-02-14 13:15:38,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-14 13:15:39,038 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 [2023-02-14 13:15:39,038 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)] === [2023-02-14 13:15:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash 503701003, now seen corresponding path program 1 times [2023-02-14 13:15:39,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:39,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959207320] [2023-02-14 13:15:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:39,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959207320] [2023-02-14 13:15:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959207320] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:15:39,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:15:39,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 13:15:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635378126] [2023-02-14 13:15:39,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:15:39,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:15:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:15:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-14 13:15:39,196 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) [2023-02-14 13:15:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:39,280 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2023-02-14 13:15:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:15:39,281 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 [2023-02-14 13:15:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:39,281 INFO L225 Difference]: With dead ends: 201 [2023-02-14 13:15:39,281 INFO L226 Difference]: Without dead ends: 201 [2023-02-14 13:15:39,282 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 [2023-02-14 13:15:39,282 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 148 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-02-14 13:15:39,282 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] [2023-02-14 13:15:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-14 13:15:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2023-02-14 13:15:39,285 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) [2023-02-14 13:15:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 224 transitions. [2023-02-14 13:15:39,285 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 224 transitions. Word has length 57 [2023-02-14 13:15:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:39,285 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 224 transitions. [2023-02-14 13:15:39,285 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) [2023-02-14 13:15:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 224 transitions. [2023-02-14 13:15:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 13:15:39,287 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:39,287 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] [2023-02-14 13:15:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-14 13:15:39,287 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)] === [2023-02-14 13:15:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1565137885, now seen corresponding path program 1 times [2023-02-14 13:15:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:39,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280362793] [2023-02-14 13:15:39,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:39,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 13:15:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 13:15:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 13:15:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:39,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:39,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280362793] [2023-02-14 13:15:39,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280362793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:15:39,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 13:15:39,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 13:15:39,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447051763] [2023-02-14 13:15:39,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:15:39,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 13:15:39,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 13:15:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 13:15:39,494 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) [2023-02-14 13:15:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:39,626 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2023-02-14 13:15:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 13:15:39,627 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 [2023-02-14 13:15:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:39,627 INFO L225 Difference]: With dead ends: 200 [2023-02-14 13:15:39,628 INFO L226 Difference]: Without dead ends: 173 [2023-02-14 13:15:39,628 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 [2023-02-14 13:15:39,628 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 [2023-02-14 13:15:39,628 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] [2023-02-14 13:15:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-14 13:15:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-02-14 13:15:39,630 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) [2023-02-14 13:15:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2023-02-14 13:15:39,630 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 58 [2023-02-14 13:15:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:39,631 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2023-02-14 13:15:39,631 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) [2023-02-14 13:15:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2023-02-14 13:15:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 13:15:39,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:39,631 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] [2023-02-14 13:15:39,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-14 13:15:39,631 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)] === [2023-02-14 13:15:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash 804662856, now seen corresponding path program 1 times [2023-02-14 13:15:39,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:39,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692660268] [2023-02-14 13:15:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:40,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:40,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:40,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:40,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692660268] [2023-02-14 13:15:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692660268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:40,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904781669] [2023-02-14 13:15:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:40,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:40,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:40,031 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) [2023-02-14 13:15:40,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 13:15:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 13:15:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:40,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:40,577 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 [2023-02-14 13:15:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:40,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904781669] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:40,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:40,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 41 [2023-02-14 13:15:40,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186882252] [2023-02-14 13:15:40,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:40,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-14 13:15:40,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-14 13:15:40,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 13:15:40,887 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) [2023-02-14 13:15:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:45,577 INFO L93 Difference]: Finished difference Result 772 states and 861 transitions. [2023-02-14 13:15:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-14 13:15:45,577 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 [2023-02-14 13:15:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:45,579 INFO L225 Difference]: With dead ends: 772 [2023-02-14 13:15:45,579 INFO L226 Difference]: Without dead ends: 772 [2023-02-14 13:15:45,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2331, Invalid=8175, Unknown=0, NotChecked=0, Total=10506 [2023-02-14 13:15:45,581 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1854 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:45,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1855 Valid, 1666 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-14 13:15:45,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2023-02-14 13:15:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 198. [2023-02-14 13:15:45,585 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) [2023-02-14 13:15:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 228 transitions. [2023-02-14 13:15:45,586 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 228 transitions. Word has length 58 [2023-02-14 13:15:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:45,586 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 228 transitions. [2023-02-14 13:15:45,586 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) [2023-02-14 13:15:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 228 transitions. [2023-02-14 13:15:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-14 13:15:45,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:45,587 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] [2023-02-14 13:15:45,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:45,792 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 [2023-02-14 13:15:45,793 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)] === [2023-02-14 13:15:45,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:45,793 INFO L85 PathProgramCache]: Analyzing trace with hash -226038058, now seen corresponding path program 2 times [2023-02-14 13:15:45,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:45,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118758075] [2023-02-14 13:15:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:45,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:45,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:45,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:45,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:45,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118758075] [2023-02-14 13:15:45,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118758075] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642053810] [2023-02-14 13:15:45,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:15:45,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:45,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:45,997 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) [2023-02-14 13:15:46,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 13:15:46,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:15:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:15:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 13:15:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:46,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:46,446 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 [2023-02-14 13:15:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:46,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642053810] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:46,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:46,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2023-02-14 13:15:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715105124] [2023-02-14 13:15:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 13:15:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 13:15:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2023-02-14 13:15:46,503 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) [2023-02-14 13:15:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:47,315 INFO L93 Difference]: Finished difference Result 330 states and 373 transitions. [2023-02-14 13:15:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 13:15:47,315 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 [2023-02-14 13:15:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:47,316 INFO L225 Difference]: With dead ends: 330 [2023-02-14 13:15:47,316 INFO L226 Difference]: Without dead ends: 330 [2023-02-14 13:15:47,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2023-02-14 13:15:47,317 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 [2023-02-14 13:15:47,318 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] [2023-02-14 13:15:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-14 13:15:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 199. [2023-02-14 13:15:47,320 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) [2023-02-14 13:15:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2023-02-14 13:15:47,321 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 59 [2023-02-14 13:15:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:47,321 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2023-02-14 13:15:47,321 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) [2023-02-14 13:15:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2023-02-14 13:15:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 13:15:47,322 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:47,322 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] [2023-02-14 13:15:47,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-02-14 13:15:47,526 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 [2023-02-14 13:15:47,526 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)] === [2023-02-14 13:15:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:47,527 INFO L85 PathProgramCache]: Analyzing trace with hash -812323954, now seen corresponding path program 1 times [2023-02-14 13:15:47,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:47,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791893129] [2023-02-14 13:15:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:47,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:47,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:47,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:47,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:47,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791893129] [2023-02-14 13:15:47,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791893129] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:47,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103227016] [2023-02-14 13:15:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:47,670 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) [2023-02-14 13:15:47,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-14 13:15:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 13:15:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 13:15:47,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 13:15:47,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103227016] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 13:15:47,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 13:15:47,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 13 [2023-02-14 13:15:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575292236] [2023-02-14 13:15:47,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 13:15:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 13:15:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 13:15:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-14 13:15:47,774 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) [2023-02-14 13:15:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:47,811 INFO L93 Difference]: Finished difference Result 203 states and 231 transitions. [2023-02-14 13:15:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 13:15:47,811 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 [2023-02-14 13:15:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:47,814 INFO L225 Difference]: With dead ends: 203 [2023-02-14 13:15:47,814 INFO L226 Difference]: Without dead ends: 203 [2023-02-14 13:15:47,814 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 [2023-02-14 13:15:47,815 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 [2023-02-14 13:15:47,815 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] [2023-02-14 13:15:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-02-14 13:15:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2023-02-14 13:15:47,817 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) [2023-02-14 13:15:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 231 transitions. [2023-02-14 13:15:47,818 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 231 transitions. Word has length 60 [2023-02-14 13:15:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:47,818 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 231 transitions. [2023-02-14 13:15:47,818 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) [2023-02-14 13:15:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 231 transitions. [2023-02-14 13:15:47,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-14 13:15:47,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:47,819 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] [2023-02-14 13:15:47,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:48,023 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 [2023-02-14 13:15:48,024 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)] === [2023-02-14 13:15:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:48,025 INFO L85 PathProgramCache]: Analyzing trace with hash 563297452, now seen corresponding path program 1 times [2023-02-14 13:15:48,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:48,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603684658] [2023-02-14 13:15:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:48,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 13:15:48,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:48,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603684658] [2023-02-14 13:15:48,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603684658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:48,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315835419] [2023-02-14 13:15:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:48,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:48,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:48,087 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) [2023-02-14 13:15:48,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-14 13:15:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 13:15:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:48,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:48,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315835419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:48,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:48,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2023-02-14 13:15:48,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024445035] [2023-02-14 13:15:48,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:48,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 13:15:48,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 13:15:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-02-14 13:15:48,308 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) [2023-02-14 13:15:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:48,581 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2023-02-14 13:15:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 13:15:48,581 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 [2023-02-14 13:15:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:48,582 INFO L225 Difference]: With dead ends: 246 [2023-02-14 13:15:48,583 INFO L226 Difference]: Without dead ends: 246 [2023-02-14 13:15:48,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 13:15:48,588 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 403 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-14 13:15:48,589 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] [2023-02-14 13:15:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-14 13:15:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 201. [2023-02-14 13:15:48,591 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) [2023-02-14 13:15:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 230 transitions. [2023-02-14 13:15:48,592 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 230 transitions. Word has length 62 [2023-02-14 13:15:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:48,592 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 230 transitions. [2023-02-14 13:15:48,592 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) [2023-02-14 13:15:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 230 transitions. [2023-02-14 13:15:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 13:15:48,593 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:48,593 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] [2023-02-14 13:15:48,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:48,800 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 [2023-02-14 13:15:48,801 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)] === [2023-02-14 13:15:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1697403066, now seen corresponding path program 1 times [2023-02-14 13:15:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:48,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818603363] [2023-02-14 13:15:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:48,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 13:15:48,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:48,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818603363] [2023-02-14 13:15:48,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818603363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:48,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710049907] [2023-02-14 13:15:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:48,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:48,986 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) [2023-02-14 13:15:48,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-14 13:15:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:49,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 13:15:49,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:49,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:15:49,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710049907] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:49,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:49,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2023-02-14 13:15:49,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016947586] [2023-02-14 13:15:49,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:49,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-14 13:15:49,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-14 13:15:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-14 13:15:49,330 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) [2023-02-14 13:15:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:49,903 INFO L93 Difference]: Finished difference Result 514 states and 595 transitions. [2023-02-14 13:15:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-14 13:15:49,904 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 [2023-02-14 13:15:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:49,905 INFO L225 Difference]: With dead ends: 514 [2023-02-14 13:15:49,905 INFO L226 Difference]: Without dead ends: 514 [2023-02-14 13:15:49,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 13:15:49,906 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 [2023-02-14 13:15:49,906 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] [2023-02-14 13:15:49,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-02-14 13:15:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 242. [2023-02-14 13:15:49,911 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) [2023-02-14 13:15:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 283 transitions. [2023-02-14 13:15:49,912 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 283 transitions. Word has length 63 [2023-02-14 13:15:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:49,915 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 283 transitions. [2023-02-14 13:15:49,915 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) [2023-02-14 13:15:49,915 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 283 transitions. [2023-02-14 13:15:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 13:15:49,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:49,915 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] [2023-02-14 13:15:49,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:50,120 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 [2023-02-14 13:15:50,120 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)] === [2023-02-14 13:15:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1085543347, now seen corresponding path program 1 times [2023-02-14 13:15:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:50,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955537922] [2023-02-14 13:15:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:50,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:50,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:50,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:50,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:50,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955537922] [2023-02-14 13:15:50,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955537922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916464657] [2023-02-14 13:15:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:50,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:50,254 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) [2023-02-14 13:15:50,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-14 13:15:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:15:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:50,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:50,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916464657] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:50,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:50,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2023-02-14 13:15:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642692978] [2023-02-14 13:15:50,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:50,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 13:15:50,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 13:15:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-14 13:15:50,509 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) [2023-02-14 13:15:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:50,830 INFO L93 Difference]: Finished difference Result 381 states and 442 transitions. [2023-02-14 13:15:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 13:15:50,831 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 [2023-02-14 13:15:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:50,832 INFO L225 Difference]: With dead ends: 381 [2023-02-14 13:15:50,832 INFO L226 Difference]: Without dead ends: 381 [2023-02-14 13:15:50,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 123 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-14 13:15:50,832 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 [2023-02-14 13:15:50,832 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] [2023-02-14 13:15:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-14 13:15:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 244. [2023-02-14 13:15:50,835 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) [2023-02-14 13:15:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 285 transitions. [2023-02-14 13:15:50,836 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 285 transitions. Word has length 63 [2023-02-14 13:15:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:50,836 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 285 transitions. [2023-02-14 13:15:50,837 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) [2023-02-14 13:15:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 285 transitions. [2023-02-14 13:15:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 13:15:50,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:50,837 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] [2023-02-14 13:15:50,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:51,042 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 [2023-02-14 13:15:51,042 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)] === [2023-02-14 13:15:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash -593864845, now seen corresponding path program 1 times [2023-02-14 13:15:51,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:51,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925380817] [2023-02-14 13:15:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:51,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:51,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:51,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:51,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:51,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925380817] [2023-02-14 13:15:51,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925380817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:51,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997337304] [2023-02-14 13:15:51,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:51,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:51,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:51,161 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) [2023-02-14 13:15:51,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-14 13:15:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-14 13:15:51,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:51,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:15:51,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997337304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:51,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:51,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2023-02-14 13:15:51,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736439225] [2023-02-14 13:15:51,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:51,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 13:15:51,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 13:15:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-14 13:15:51,431 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) [2023-02-14 13:15:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:51,810 INFO L93 Difference]: Finished difference Result 393 states and 457 transitions. [2023-02-14 13:15:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 13:15:51,810 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 [2023-02-14 13:15:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:51,811 INFO L225 Difference]: With dead ends: 393 [2023-02-14 13:15:51,811 INFO L226 Difference]: Without dead ends: 393 [2023-02-14 13:15:51,811 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 [2023-02-14 13:15:51,812 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 [2023-02-14 13:15:51,812 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] [2023-02-14 13:15:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-14 13:15:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 262. [2023-02-14 13:15:51,815 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) [2023-02-14 13:15:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2023-02-14 13:15:51,816 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 65 [2023-02-14 13:15:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:51,816 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2023-02-14 13:15:51,816 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) [2023-02-14 13:15:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2023-02-14 13:15:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 13:15:51,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:51,817 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] [2023-02-14 13:15:51,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-14 13:15:52,021 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 [2023-02-14 13:15:52,022 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)] === [2023-02-14 13:15:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:52,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1577858453, now seen corresponding path program 2 times [2023-02-14 13:15:52,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:52,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916096661] [2023-02-14 13:15:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:52,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:52,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:52,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:52,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:15:52,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916096661] [2023-02-14 13:15:52,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916096661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020904155] [2023-02-14 13:15:52,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:15:52,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:52,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:52,290 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) [2023-02-14 13:15:52,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-14 13:15:52,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:15:52,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:15:52,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 13:15:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 13:15:52,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:52,692 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 [2023-02-14 13:15:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 13:15:52,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020904155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:52,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:52,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-02-14 13:15:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307722930] [2023-02-14 13:15:52,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:52,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 13:15:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 13:15:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 13:15:52,811 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) [2023-02-14 13:15:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:54,546 INFO L93 Difference]: Finished difference Result 563 states and 649 transitions. [2023-02-14 13:15:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-14 13:15:54,546 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 [2023-02-14 13:15:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:54,548 INFO L225 Difference]: With dead ends: 563 [2023-02-14 13:15:54,548 INFO L226 Difference]: Without dead ends: 563 [2023-02-14 13:15:54,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1267, Invalid=3989, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 13:15:54,550 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1099 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:54,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 938 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 13:15:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-02-14 13:15:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 285. [2023-02-14 13:15:54,560 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) [2023-02-14 13:15:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 335 transitions. [2023-02-14 13:15:54,561 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 335 transitions. Word has length 67 [2023-02-14 13:15:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:54,561 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 335 transitions. [2023-02-14 13:15:54,561 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) [2023-02-14 13:15:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 335 transitions. [2023-02-14 13:15:54,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 13:15:54,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:54,562 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] [2023-02-14 13:15:54,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:54,767 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 [2023-02-14 13:15:54,767 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)] === [2023-02-14 13:15:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1797398521, now seen corresponding path program 1 times [2023-02-14 13:15:54,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:54,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959963721] [2023-02-14 13:15:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:54,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:54,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:54,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:54,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:54,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 13:15:54,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:54,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959963721] [2023-02-14 13:15:54,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959963721] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:54,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519610360] [2023-02-14 13:15:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:54,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:54,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:54,941 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) [2023-02-14 13:15:54,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-14 13:15:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:55,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 13:15:55,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:15:55,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 13:15:55,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519610360] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:55,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:55,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2023-02-14 13:15:55,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134644424] [2023-02-14 13:15:55,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:55,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 13:15:55,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:55,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 13:15:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:15:55,386 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) [2023-02-14 13:15:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:15:55,714 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2023-02-14 13:15:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 13:15:55,715 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 [2023-02-14 13:15:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:15:55,717 INFO L225 Difference]: With dead ends: 519 [2023-02-14 13:15:55,717 INFO L226 Difference]: Without dead ends: 519 [2023-02-14 13:15:55,723 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 [2023-02-14 13:15:55,725 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, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 13:15:55,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1373 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 13:15:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-02-14 13:15:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 268. [2023-02-14 13:15:55,732 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) [2023-02-14 13:15:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 310 transitions. [2023-02-14 13:15:55,733 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 310 transitions. Word has length 71 [2023-02-14 13:15:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:15:55,733 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 310 transitions. [2023-02-14 13:15:55,733 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) [2023-02-14 13:15:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 310 transitions. [2023-02-14 13:15:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 13:15:55,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:15:55,734 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] [2023-02-14 13:15:55,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-14 13:15:55,941 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 [2023-02-14 13:15:55,942 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)] === [2023-02-14 13:15:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:15:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2098065761, now seen corresponding path program 1 times [2023-02-14 13:15:55,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:15:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822004929] [2023-02-14 13:15:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:55,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:15:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:57,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:15:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:57,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:15:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:57,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:15:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:57,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:15:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:15:57,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:15:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822004929] [2023-02-14 13:15:57,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822004929] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:15:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273988383] [2023-02-14 13:15:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:15:57,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:15:57,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:15:57,573 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) [2023-02-14 13:15:57,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-14 13:15:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:15:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-14 13:15:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:15:58,144 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 [2023-02-14 13:15:58,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 13:15:58,434 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 [2023-02-14 13:15:58,548 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 [2023-02-14 13:15:58,649 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 [2023-02-14 13:15:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 13:15:58,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:15:58,783 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 [2023-02-14 13:15:59,213 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 [2023-02-14 13:15:59,216 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 [2023-02-14 13:15:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 13:15:59,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273988383] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:15:59,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:15:59,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 21] total 64 [2023-02-14 13:15:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129202187] [2023-02-14 13:15:59,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:15:59,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-14 13:15:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:15:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-14 13:15:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3813, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 13:15:59,671 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) [2023-02-14 13:16:13,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:16:13,029 INFO L93 Difference]: Finished difference Result 471 states and 539 transitions. [2023-02-14 13:16:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-14 13:16:13,029 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 [2023-02-14 13:16:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:16:13,030 INFO L225 Difference]: With dead ends: 471 [2023-02-14 13:16:13,030 INFO L226 Difference]: Without dead ends: 471 [2023-02-14 13:16:13,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1844, Invalid=17616, Unknown=0, NotChecked=0, Total=19460 [2023-02-14 13:16:13,032 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, 3.1s IncrementalHoareTripleChecker+Time [2023-02-14 13:16:13,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1816 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4337 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-14 13:16:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-02-14 13:16:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2023-02-14 13:16:13,054 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) [2023-02-14 13:16:13,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 315 transitions. [2023-02-14 13:16:13,055 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 315 transitions. Word has length 72 [2023-02-14 13:16:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:16:13,057 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 315 transitions. [2023-02-14 13:16:13,057 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) [2023-02-14 13:16:13,057 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 315 transitions. [2023-02-14 13:16:13,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-14 13:16:13,058 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:16:13,059 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] [2023-02-14 13:16:13,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-14 13:16:13,263 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 [2023-02-14 13:16:13,264 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)] === [2023-02-14 13:16:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:16:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1879843590, now seen corresponding path program 2 times [2023-02-14 13:16:13,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:16:13,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742353679] [2023-02-14 13:16:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:16:13,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:16:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:16:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:16:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:13,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:16:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:16:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:16:13,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:16:13,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742353679] [2023-02-14 13:16:13,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742353679] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:16:13,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018604548] [2023-02-14 13:16:13,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:16:13,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:16:13,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:16:13,532 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) [2023-02-14 13:16:13,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-14 13:16:13,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:16:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:16:13,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 13:16:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:16:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:16:13,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:16:14,059 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 [2023-02-14 13:16:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:16:14,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018604548] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:16:14,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:16:14,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2023-02-14 13:16:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858825115] [2023-02-14 13:16:14,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:16:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 13:16:14,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:16:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 13:16:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2023-02-14 13:16:14,267 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) [2023-02-14 13:16:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:16:15,252 INFO L93 Difference]: Finished difference Result 410 states and 463 transitions. [2023-02-14 13:16:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 13:16:15,253 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 [2023-02-14 13:16:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:16:15,254 INFO L225 Difference]: With dead ends: 410 [2023-02-14 13:16:15,254 INFO L226 Difference]: Without dead ends: 410 [2023-02-14 13:16:15,254 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 [2023-02-14 13:16:15,255 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 [2023-02-14 13:16:15,255 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] [2023-02-14 13:16:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-02-14 13:16:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 277. [2023-02-14 13:16:15,258 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) [2023-02-14 13:16:15,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 320 transitions. [2023-02-14 13:16:15,258 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 320 transitions. Word has length 73 [2023-02-14 13:16:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:16:15,259 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 320 transitions. [2023-02-14 13:16:15,259 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) [2023-02-14 13:16:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 320 transitions. [2023-02-14 13:16:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-14 13:16:15,259 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:16:15,259 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] [2023-02-14 13:16:15,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-14 13:16:15,464 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 [2023-02-14 13:16:15,464 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)] === [2023-02-14 13:16:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:16:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1854390861, now seen corresponding path program 3 times [2023-02-14 13:16:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:16:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652484958] [2023-02-14 13:16:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:16:15,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:16:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:15,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:16:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:15,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:16:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:15,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:16:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:15,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:16:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:16:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:16:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:16:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652484958] [2023-02-14 13:16:15,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652484958] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:16:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126347768] [2023-02-14 13:16:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:16:15,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:16:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:16:15,723 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) [2023-02-14 13:16:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-14 13:16:15,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 13:16:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:16:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-14 13:16:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:16:16,115 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 [2023-02-14 13:16:16,555 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 [2023-02-14 13:16:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-14 13:16:16,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:16:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 13:16:17,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126347768] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:16:17,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:16:17,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 18] total 49 [2023-02-14 13:16:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262916450] [2023-02-14 13:16:17,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:16:17,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 13:16:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:16:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 13:16:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 13:16:17,515 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) [2023-02-14 13:16:22,210 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] [2023-02-14 13:16:25,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:27,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:29,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:32,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:34,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:36,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:38,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:40,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:43,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:45,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:47,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:49,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:51,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:53,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:55,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:57,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:16:59,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:17:01,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 13:17:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:17:03,817 INFO L93 Difference]: Finished difference Result 691 states and 778 transitions. [2023-02-14 13:17:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-14 13:17:03,817 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 [2023-02-14 13:17:03,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:17:03,819 INFO L225 Difference]: With dead ends: 691 [2023-02-14 13:17:03,819 INFO L226 Difference]: Without dead ends: 684 [2023-02-14 13:17:03,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4071 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2198, Invalid=14314, Unknown=0, NotChecked=0, Total=16512 [2023-02-14 13:17:03,821 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 1792 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 5769 mSolverCounterSat, 64 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 5854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 5769 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.6s IncrementalHoareTripleChecker+Time [2023-02-14 13:17:03,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 3577 Invalid, 5854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 5769 Invalid, 21 Unknown, 0 Unchecked, 42.6s Time] [2023-02-14 13:17:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-14 13:17:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 337. [2023-02-14 13:17:03,825 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) [2023-02-14 13:17:03,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2023-02-14 13:17:03,825 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 74 [2023-02-14 13:17:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:17:03,826 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2023-02-14 13:17:03,826 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) [2023-02-14 13:17:03,826 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2023-02-14 13:17:03,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-14 13:17:03,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:17:03,828 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] [2023-02-14 13:17:03,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-14 13:17:04,033 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 [2023-02-14 13:17:04,033 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)] === [2023-02-14 13:17:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:17:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1481214108, now seen corresponding path program 2 times [2023-02-14 13:17:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:17:04,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750529760] [2023-02-14 13:17:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:17:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:17:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:04,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:17:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:04,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:17:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:04,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 13:17:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:04,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 13:17:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 13:17:04,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:17:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750529760] [2023-02-14 13:17:04,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750529760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:17:04,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175375488] [2023-02-14 13:17:04,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 13:17:04,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:17:04,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:17:04,222 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) [2023-02-14 13:17:04,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-14 13:17:04,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 13:17:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:17:04,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 13:17:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:17:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 13:17:04,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:17:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 13:17:04,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175375488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:17:04,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:17:04,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 20 [2023-02-14 13:17:04,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772534193] [2023-02-14 13:17:04,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:17:04,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 13:17:04,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:17:04,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 13:17:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-14 13:17:04,539 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) [2023-02-14 13:17:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:17:05,028 INFO L93 Difference]: Finished difference Result 512 states and 584 transitions. [2023-02-14 13:17:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 13:17:05,028 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 [2023-02-14 13:17:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:17:05,030 INFO L225 Difference]: With dead ends: 512 [2023-02-14 13:17:05,030 INFO L226 Difference]: Without dead ends: 512 [2023-02-14 13:17:05,030 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 [2023-02-14 13:17:05,030 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 [2023-02-14 13:17:05,030 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] [2023-02-14 13:17:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-02-14 13:17:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 329. [2023-02-14 13:17:05,034 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) [2023-02-14 13:17:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 376 transitions. [2023-02-14 13:17:05,035 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 376 transitions. Word has length 75 [2023-02-14 13:17:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:17:05,035 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 376 transitions. [2023-02-14 13:17:05,035 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) [2023-02-14 13:17:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 376 transitions. [2023-02-14 13:17:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-14 13:17:05,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:17:05,035 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] [2023-02-14 13:17:05,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-14 13:17:05,254 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 [2023-02-14 13:17:05,255 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)] === [2023-02-14 13:17:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:17:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1833874459, now seen corresponding path program 1 times [2023-02-14 13:17:05,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:17:05,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375626129] [2023-02-14 13:17:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:17:05,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:17:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:05,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:17:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:05,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:17:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:05,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:17:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:05,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:17:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-14 13:17:05,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:17:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375626129] [2023-02-14 13:17:05,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375626129] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:17:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501304676] [2023-02-14 13:17:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:17:05,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:17:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:17:05,435 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) [2023-02-14 13:17:05,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-14 13:17:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-14 13:17:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:17:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:17:05,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:17:05,890 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 [2023-02-14 13:17:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 13:17:05,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501304676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:17:05,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:17:05,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2023-02-14 13:17:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992676403] [2023-02-14 13:17:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:17:05,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 13:17:05,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:17:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 13:17:05,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-02-14 13:17:05,949 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) [2023-02-14 13:17:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:17:06,174 INFO L93 Difference]: Finished difference Result 344 states and 390 transitions. [2023-02-14 13:17:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 13:17:06,174 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 [2023-02-14 13:17:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:17:06,175 INFO L225 Difference]: With dead ends: 344 [2023-02-14 13:17:06,175 INFO L226 Difference]: Without dead ends: 344 [2023-02-14 13:17:06,176 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 [2023-02-14 13:17:06,176 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 [2023-02-14 13:17:06,177 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] [2023-02-14 13:17:06,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-02-14 13:17:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 333. [2023-02-14 13:17:06,180 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) [2023-02-14 13:17:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 380 transitions. [2023-02-14 13:17:06,181 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 380 transitions. Word has length 77 [2023-02-14 13:17:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:17:06,181 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 380 transitions. [2023-02-14 13:17:06,181 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) [2023-02-14 13:17:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 380 transitions. [2023-02-14 13:17:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-14 13:17:06,182 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:17:06,182 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] [2023-02-14 13:17:06,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-14 13:17:06,387 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 [2023-02-14 13:17:06,388 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)] === [2023-02-14 13:17:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:17:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1224026182, now seen corresponding path program 3 times [2023-02-14 13:17:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:17:06,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501154963] [2023-02-14 13:17:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:17:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:17:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:06,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:17:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:06,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-14 13:17:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:06,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 13:17:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:06,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 13:17:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 83 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 13:17:06,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:17:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501154963] [2023-02-14 13:17:06,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501154963] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:17:06,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424135867] [2023-02-14 13:17:06,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 13:17:06,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:17:06,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:17:06,647 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) [2023-02-14 13:17:06,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-14 13:17:06,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 13:17:06,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 13:17:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 13:17:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:17:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-14 13:17:06,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 13:17:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-14 13:17:07,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424135867] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 13:17:07,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 13:17:07,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 31 [2023-02-14 13:17:07,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018665397] [2023-02-14 13:17:07,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 13:17:07,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 13:17:07,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 13:17:07,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 13:17:07,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-02-14 13:17:07,261 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) [2023-02-14 13:17:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 13:17:09,047 INFO L93 Difference]: Finished difference Result 618 states and 700 transitions. [2023-02-14 13:17:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-14 13:17:09,047 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 [2023-02-14 13:17:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 13:17:09,049 INFO L225 Difference]: With dead ends: 618 [2023-02-14 13:17:09,049 INFO L226 Difference]: Without dead ends: 618 [2023-02-14 13:17:09,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1635, Invalid=8465, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 13:17:09,073 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1741 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 13:17:09,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1744 Valid, 673 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 13:17:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-02-14 13:17:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 356. [2023-02-14 13:17:09,078 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) [2023-02-14 13:17:09,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 401 transitions. [2023-02-14 13:17:09,080 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 401 transitions. Word has length 79 [2023-02-14 13:17:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 13:17:09,080 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 401 transitions. [2023-02-14 13:17:09,080 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) [2023-02-14 13:17:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 401 transitions. [2023-02-14 13:17:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-14 13:17:09,081 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 13:17:09,081 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] [2023-02-14 13:17:09,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-14 13:17:09,285 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 [2023-02-14 13:17:09,286 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)] === [2023-02-14 13:17:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 13:17:09,286 INFO L85 PathProgramCache]: Analyzing trace with hash 970084470, now seen corresponding path program 1 times [2023-02-14 13:17:09,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 13:17:09,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057369377] [2023-02-14 13:17:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:17:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 13:17:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:11,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 13:17:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 13:17:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:11,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 13:17:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:11,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 13:17:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 13:17:11,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 13:17:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057369377] [2023-02-14 13:17:11,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057369377] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 13:17:11,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590075664] [2023-02-14 13:17:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 13:17:11,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 13:17:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 13:17:11,278 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) [2023-02-14 13:17:11,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-14 13:17:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 13:17:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 142 conjunts are in the unsatisfiable core [2023-02-14 13:17:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 13:17:11,566 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 [2023-02-14 13:17:11,613 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 [2023-02-14 13:17:11,696 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 13:17:11,696 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 [2023-02-14 13:17:11,743 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 [2023-02-14 13:17:11,780 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 [2023-02-14 13:17:11,883 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 [2023-02-14 13:17:12,454 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 [2023-02-14 13:17:12,907 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 [2023-02-14 13:17:16,551 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 [2023-02-14 13:17:16,833 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 [2023-02-14 13:17:30,158 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 [2023-02-14 13:17:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 13:17:30,313 INFO L328 TraceCheckSpWp]: Computing backward predicates...