./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 574ddb4e 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/ldv-memsafety/ArraysOfVariableLength2.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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 21:05:55,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 21:05:55,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 21:05:55,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 21:05:55,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 21:05:55,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 21:05:55,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 21:05:55,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 21:05:55,055 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 21:05:55,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 21:05:55,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 21:05:55,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 21:05:55,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 21:05:55,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 21:05:55,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 21:05:55,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 21:05:55,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 21:05:55,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 21:05:55,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 21:05:55,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 21:05:55,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 21:05:55,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 21:05:55,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 21:05:55,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 21:05:55,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 21:05:55,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 21:05:55,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 21:05:55,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 21:05:55,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 21:05:55,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 21:05:55,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 21:05:55,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 21:05:55,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 21:05:55,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 21:05:55,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 21:05:55,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 21:05:55,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 21:05:55,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 21:05:55,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 21:05:55,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 21:05:55,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 21:05:55,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 21:05:55,115 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 21:05:55,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 21:05:55,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 21:05:55,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 21:05:55,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 21:05:55,116 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 21:05:55,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 21:05:55,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 21:05:55,117 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 21:05:55,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 21:05:55,117 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 21:05:55,118 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 21:05:55,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 21:05:55,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 21:05:55,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 21:05:55,118 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 21:05:55,118 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 21:05:55,119 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 21:05:55,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 21:05:55,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 21:05:55,119 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 21:05:55,119 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 21:05:55,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 21:05:55,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 21:05:55,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 21:05:55,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 21:05:55,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 21:05:55,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 21:05:55,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 21:05:55,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 21:05:55,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 21:05:55,121 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 21:05:55,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 21:05:55,121 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 21:05:55,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2023-02-18 21:05:55,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 21:05:55,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 21:05:55,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 21:05:55,331 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 21:05:55,331 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 21:05:55,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2023-02-18 21:05:56,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 21:05:56,745 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 21:05:56,746 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2023-02-18 21:05:56,752 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63d78522b/a25d1fe6f0c3485eb4e8d174bfbb53f1/FLAG35b4598ad [2023-02-18 21:05:56,765 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63d78522b/a25d1fe6f0c3485eb4e8d174bfbb53f1 [2023-02-18 21:05:56,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 21:05:56,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 21:05:56,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 21:05:56,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 21:05:56,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 21:05:56,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:56,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9d94f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56, skipping insertion in model container [2023-02-18 21:05:56,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:56,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 21:05:56,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 21:05:56,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 21:05:56,933 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 21:05:56,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 21:05:56,960 INFO L208 MainTranslator]: Completed translation [2023-02-18 21:05:56,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56 WrapperNode [2023-02-18 21:05:56,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 21:05:56,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 21:05:56,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 21:05:56,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 21:05:56,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:56,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:56,989 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2023-02-18 21:05:56,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 21:05:56,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 21:05:56,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 21:05:56,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 21:05:57,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 21:05:57,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 21:05:57,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 21:05:57,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 21:05:57,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (1/1) ... [2023-02-18 21:05:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 21:05:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:05:57,044 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) [2023-02-18 21:05:57,054 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 [2023-02-18 21:05:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 21:05:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 21:05:57,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 21:05:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 21:05:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 21:05:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 21:05:57,144 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 21:05:57,146 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 21:05:57,371 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 21:05:57,377 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 21:05:57,378 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 21:05:57,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:05:57 BoogieIcfgContainer [2023-02-18 21:05:57,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 21:05:57,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 21:05:57,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 21:05:57,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 21:05:57,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 09:05:56" (1/3) ... [2023-02-18 21:05:57,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a5c421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:05:57, skipping insertion in model container [2023-02-18 21:05:57,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:05:56" (2/3) ... [2023-02-18 21:05:57,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a5c421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:05:57, skipping insertion in model container [2023-02-18 21:05:57,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:05:57" (3/3) ... [2023-02-18 21:05:57,389 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2023-02-18 21:05:57,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 21:05:57,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-02-18 21:05:57,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 21:05:57,439 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;@4534679b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 21:05:57,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-02-18 21:05:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:57,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-02-18 21:05:57,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:57,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-02-18 21:05:57,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:57,462 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2023-02-18 21:05:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:57,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015046319] [2023-02-18 21:05:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:57,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:57,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015046319] [2023-02-18 21:05:57,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015046319] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:05:57,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:05:57,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:05:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627045604] [2023-02-18 21:05:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:05:57,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:05:57,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:05:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:05:57,804 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:05:57,881 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-02-18 21:05:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:05:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-02-18 21:05:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:05:57,893 INFO L225 Difference]: With dead ends: 69 [2023-02-18 21:05:57,893 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 21:05:57,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:05:57,898 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:05:57,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:05:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 21:05:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2023-02-18 21:05:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-02-18 21:05:57,927 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2023-02-18 21:05:57,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:05:57,927 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-02-18 21:05:57,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-02-18 21:05:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 21:05:57,928 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:57,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:05:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 21:05:57,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2023-02-18 21:05:57,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:57,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697974512] [2023-02-18 21:05:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:58,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:58,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697974512] [2023-02-18 21:05:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697974512] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:05:58,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:05:58,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:05:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237203778] [2023-02-18 21:05:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:05:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:05:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:05:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:05:58,026 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:05:58,120 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2023-02-18 21:05:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 21:05:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-18 21:05:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:05:58,122 INFO L225 Difference]: With dead ends: 70 [2023-02-18 21:05:58,122 INFO L226 Difference]: Without dead ends: 70 [2023-02-18 21:05:58,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:05:58,126 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:05:58,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:05:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-18 21:05:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2023-02-18 21:05:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-02-18 21:05:58,131 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2023-02-18 21:05:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:05:58,132 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-02-18 21:05:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-02-18 21:05:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 21:05:58,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:58,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:05:58,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 21:05:58,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:58,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2023-02-18 21:05:58,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:58,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937235191] [2023-02-18 21:05:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:58,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937235191] [2023-02-18 21:05:58,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937235191] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:05:58,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:05:58,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 21:05:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259363541] [2023-02-18 21:05:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:05:58,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:05:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:05:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:05:58,253 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:05:58,286 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-02-18 21:05:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 21:05:58,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 21:05:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:05:58,288 INFO L225 Difference]: With dead ends: 75 [2023-02-18 21:05:58,289 INFO L226 Difference]: Without dead ends: 75 [2023-02-18 21:05:58,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 21:05:58,291 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 63 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:05:58,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 152 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:05:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-18 21:05:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2023-02-18 21:05:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-02-18 21:05:58,304 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2023-02-18 21:05:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:05:58,305 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-02-18 21:05:58,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-02-18 21:05:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 21:05:58,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:58,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:05:58,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 21:05:58,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2023-02-18 21:05:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:58,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312519938] [2023-02-18 21:05:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312519938] [2023-02-18 21:05:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312519938] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:05:58,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:05:58,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:05:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672708531] [2023-02-18 21:05:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:05:58,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:05:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:05:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:05:58,489 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:05:58,531 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-02-18 21:05:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:05:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 21:05:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:05:58,536 INFO L225 Difference]: With dead ends: 43 [2023-02-18 21:05:58,536 INFO L226 Difference]: Without dead ends: 43 [2023-02-18 21:05:58,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:05:58,543 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:05:58,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:05:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-18 21:05:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-18 21:05:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-02-18 21:05:58,554 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2023-02-18 21:05:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:05:58,554 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-02-18 21:05:58,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-02-18 21:05:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 21:05:58,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:58,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:05:58,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 21:05:58,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2023-02-18 21:05:58,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:58,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123006832] [2023-02-18 21:05:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:58,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:58,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123006832] [2023-02-18 21:05:58,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123006832] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:05:58,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:05:58,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 21:05:58,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638972230] [2023-02-18 21:05:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:05:58,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:05:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:58,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:05:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:05:58,689 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:05:58,747 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-02-18 21:05:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:05:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 21:05:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:05:58,748 INFO L225 Difference]: With dead ends: 50 [2023-02-18 21:05:58,748 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 21:05:58,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-02-18 21:05:58,749 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:05:58,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:05:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 21:05:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-02-18 21:05:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-18 21:05:58,753 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2023-02-18 21:05:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:05:58,754 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-18 21:05:58,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-18 21:05:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 21:05:58,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:58,754 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:05:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 21:05:58,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2023-02-18 21:05:58,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:58,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753756311] [2023-02-18 21:05:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:58,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:58,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:58,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753756311] [2023-02-18 21:05:58,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753756311] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:05:58,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:05:58,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:05:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596214321] [2023-02-18 21:05:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:05:58,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:05:58,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:05:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:05:58,824 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:05:58,853 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2023-02-18 21:05:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:05:58,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 21:05:58,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:05:58,855 INFO L225 Difference]: With dead ends: 47 [2023-02-18 21:05:58,855 INFO L226 Difference]: Without dead ends: 47 [2023-02-18 21:05:58,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:05:58,856 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:05:58,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:05:58,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-18 21:05:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-18 21:05:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-02-18 21:05:58,873 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2023-02-18 21:05:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:05:58,874 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-02-18 21:05:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:05:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-02-18 21:05:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 21:05:58,874 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:05:58,875 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:05:58,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 21:05:58,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:05:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:05:58,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2023-02-18 21:05:58,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:05:58,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167000168] [2023-02-18 21:05:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:58,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:05:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:59,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:05:59,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167000168] [2023-02-18 21:05:59,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167000168] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:05:59,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851997911] [2023-02-18 21:05:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:05:59,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:05:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:05:59,017 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) [2023-02-18 21:05:59,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 21:05:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:05:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 21:05:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:05:59,148 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 [2023-02-18 21:05:59,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:05:59,164 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 12 treesize of output 28 [2023-02-18 21:05:59,200 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 [2023-02-18 21:05:59,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:05:59,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:05:59,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 43 treesize of output 68 [2023-02-18 21:05:59,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:05:59,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 83 [2023-02-18 21:05:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:59,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:05:59,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:05:59,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2023-02-18 21:05:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:05:59,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851997911] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:05:59,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:05:59,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-02-18 21:05:59,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948840646] [2023-02-18 21:05:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:05:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 21:05:59,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:05:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 21:05:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:05:59,751 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:00,038 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2023-02-18 21:06:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 21:06:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 21:06:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:00,039 INFO L225 Difference]: With dead ends: 111 [2023-02-18 21:06:00,040 INFO L226 Difference]: Without dead ends: 111 [2023-02-18 21:06:00,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2023-02-18 21:06:00,041 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 348 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:00,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 93 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:06:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-18 21:06:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 53. [2023-02-18 21:06:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-02-18 21:06:00,044 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 16 [2023-02-18 21:06:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:00,044 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-02-18 21:06:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-02-18 21:06:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 21:06:00,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:00,045 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:00,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:00,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:00,246 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:00,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2023-02-18 21:06:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965460020] [2023-02-18 21:06:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:00,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:00,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965460020] [2023-02-18 21:06:00,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965460020] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:06:00,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:06:00,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 21:06:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901957669] [2023-02-18 21:06:00,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:06:00,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 21:06:00,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:00,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 21:06:00,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:06:00,294 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:00,313 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-18 21:06:00,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 21:06:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 21:06:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:00,314 INFO L225 Difference]: With dead ends: 52 [2023-02-18 21:06:00,314 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 21:06:00,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 21:06:00,315 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:00,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 21:06:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 21:06:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-02-18 21:06:00,322 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 17 [2023-02-18 21:06:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:00,322 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-02-18 21:06:00,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-02-18 21:06:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 21:06:00,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:00,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:00,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 21:06:00,324 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2023-02-18 21:06:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:00,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976636892] [2023-02-18 21:06:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:00,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:00,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:00,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976636892] [2023-02-18 21:06:00,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976636892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:00,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699323416] [2023-02-18 21:06:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:00,465 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) [2023-02-18 21:06:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 21:06:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 21:06:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:00,560 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 [2023-02-18 21:06:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:00,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:00,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699323416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:00,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:00,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 21:06:00,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579415115] [2023-02-18 21:06:00,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:06:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:06:00,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:06:00,614 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:00,765 INFO L93 Difference]: Finished difference Result 200 states and 237 transitions. [2023-02-18 21:06:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 21:06:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 21:06:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:00,768 INFO L225 Difference]: With dead ends: 200 [2023-02-18 21:06:00,768 INFO L226 Difference]: Without dead ends: 200 [2023-02-18 21:06:00,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2023-02-18 21:06:00,771 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 247 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:00,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 117 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:06:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-18 21:06:00,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 116. [2023-02-18 21:06:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.3545454545454545) internal successors, (149), 115 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 149 transitions. [2023-02-18 21:06:00,786 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 149 transitions. Word has length 17 [2023-02-18 21:06:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:00,786 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 149 transitions. [2023-02-18 21:06:00,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:00,787 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 149 transitions. [2023-02-18 21:06:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 21:06:00,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:00,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:00,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:00,992 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,SelfDestructingSolverStorable8 [2023-02-18 21:06:00,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2023-02-18 21:06:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:00,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989343775] [2023-02-18 21:06:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:01,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989343775] [2023-02-18 21:06:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989343775] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 21:06:01,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 21:06:01,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 21:06:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806756970] [2023-02-18 21:06:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:06:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 21:06:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 21:06:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 21:06:01,037 INFO L87 Difference]: Start difference. First operand 116 states and 149 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:01,059 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2023-02-18 21:06:01,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 21:06:01,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 21:06:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:01,060 INFO L225 Difference]: With dead ends: 115 [2023-02-18 21:06:01,060 INFO L226 Difference]: Without dead ends: 115 [2023-02-18 21:06:01,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 21:06:01,061 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:01,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 50 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:01,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-18 21:06:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-18 21:06:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.3272727272727274) internal successors, (146), 114 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 146 transitions. [2023-02-18 21:06:01,068 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 146 transitions. Word has length 18 [2023-02-18 21:06:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:01,068 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 146 transitions. [2023-02-18 21:06:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 146 transitions. [2023-02-18 21:06:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 21:06:01,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:01,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 21:06:01,072 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:01,073 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2023-02-18 21:06:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:01,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788983171] [2023-02-18 21:06:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:01,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:01,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788983171] [2023-02-18 21:06:01,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788983171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:01,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137306045] [2023-02-18 21:06:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:01,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:01,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:01,120 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) [2023-02-18 21:06:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 21:06:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:01,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 21:06:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:01,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137306045] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:01,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:01,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-18 21:06:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080960895] [2023-02-18 21:06:01,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:01,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 21:06:01,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 21:06:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 21:06:01,214 INFO L87 Difference]: Start difference. First operand 115 states and 146 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:01,272 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2023-02-18 21:06:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:06:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 21:06:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:01,274 INFO L225 Difference]: With dead ends: 116 [2023-02-18 21:06:01,274 INFO L226 Difference]: Without dead ends: 116 [2023-02-18 21:06:01,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:06:01,275 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:01,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-18 21:06:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2023-02-18 21:06:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.290909090909091) internal successors, (142), 114 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 142 transitions. [2023-02-18 21:06:01,281 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 142 transitions. Word has length 18 [2023-02-18 21:06:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:01,281 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 142 transitions. [2023-02-18 21:06:01,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 142 transitions. [2023-02-18 21:06:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 21:06:01,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:01,283 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:01,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:01,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:01,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:01,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1521006272, now seen corresponding path program 1 times [2023-02-18 21:06:01,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060176249] [2023-02-18 21:06:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:01,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:01,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060176249] [2023-02-18 21:06:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060176249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613169951] [2023-02-18 21:06:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:01,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:01,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:01,551 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) [2023-02-18 21:06:01,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 21:06:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 21:06:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:01,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:01,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613169951] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:01,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:01,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-18 21:06:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522343106] [2023-02-18 21:06:01,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:01,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 21:06:01,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:01,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 21:06:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 21:06:01,654 INFO L87 Difference]: Start difference. First operand 115 states and 142 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:01,746 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2023-02-18 21:06:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 21:06:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 21:06:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:01,748 INFO L225 Difference]: With dead ends: 118 [2023-02-18 21:06:01,748 INFO L226 Difference]: Without dead ends: 118 [2023-02-18 21:06:01,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:06:01,749 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 128 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:01,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 124 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:06:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-18 21:06:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2023-02-18 21:06:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 108 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2023-02-18 21:06:01,751 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 22 [2023-02-18 21:06:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:01,752 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2023-02-18 21:06:01,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2023-02-18 21:06:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 21:06:01,752 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:01,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:01,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:01,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2023-02-18 21:06:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:01,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240050417] [2023-02-18 21:06:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:02,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240050417] [2023-02-18 21:06:02,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240050417] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:02,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377241104] [2023-02-18 21:06:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:02,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:02,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:02,076 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) [2023-02-18 21:06:02,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 21:06:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:02,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 21:06:02,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:02,147 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 [2023-02-18 21:06:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:02,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377241104] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:02,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 21:06:02,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2023-02-18 21:06:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468204502] [2023-02-18 21:06:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 21:06:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 21:06:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 21:06:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:06:02,197 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:02,253 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2023-02-18 21:06:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 21:06:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 21:06:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:02,254 INFO L225 Difference]: With dead ends: 136 [2023-02-18 21:06:02,255 INFO L226 Difference]: Without dead ends: 136 [2023-02-18 21:06:02,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-18 21:06:02,256 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:02,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 63 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-18 21:06:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2023-02-18 21:06:02,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 111 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2023-02-18 21:06:02,259 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 23 [2023-02-18 21:06:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:02,260 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2023-02-18 21:06:02,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:02,260 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2023-02-18 21:06:02,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 21:06:02,263 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:02,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:02,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:02,469 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,SelfDestructingSolverStorable12 [2023-02-18 21:06:02,470 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2023-02-18 21:06:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:02,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326809896] [2023-02-18 21:06:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:02,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:02,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326809896] [2023-02-18 21:06:02,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326809896] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:02,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408985115] [2023-02-18 21:06:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:02,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:02,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:02,538 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) [2023-02-18 21:06:02,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 21:06:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:02,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 21:06:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:02,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:02,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408985115] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:02,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:02,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-02-18 21:06:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002799226] [2023-02-18 21:06:02,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:02,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 21:06:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 21:06:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:06:02,643 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:02,709 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2023-02-18 21:06:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:06:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 21:06:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:02,711 INFO L225 Difference]: With dead ends: 109 [2023-02-18 21:06:02,712 INFO L226 Difference]: Without dead ends: 109 [2023-02-18 21:06:02,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:06:02,712 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 74 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:02,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 105 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:02,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-18 21:06:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2023-02-18 21:06:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 102 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:02,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2023-02-18 21:06:02,716 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 27 [2023-02-18 21:06:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:02,716 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2023-02-18 21:06:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2023-02-18 21:06:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 21:06:02,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:02,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:02,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:02,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:02,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2023-02-18 21:06:02,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:02,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625670235] [2023-02-18 21:06:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:03,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625670235] [2023-02-18 21:06:03,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625670235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:03,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883370805] [2023-02-18 21:06:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:03,014 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) [2023-02-18 21:06:03,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 21:06:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 21:06:03,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:03,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:03,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883370805] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:03,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:03,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 21:06:03,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163868749] [2023-02-18 21:06:03,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:03,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:06:03,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:03,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:06:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:06:03,133 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:03,222 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2023-02-18 21:06:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 21:06:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 21:06:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:03,224 INFO L225 Difference]: With dead ends: 112 [2023-02-18 21:06:03,224 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 21:06:03,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2023-02-18 21:06:03,226 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 239 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:03,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 147 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:03,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 21:06:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2023-02-18 21:06:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 101 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2023-02-18 21:06:03,229 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 27 [2023-02-18 21:06:03,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:03,229 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2023-02-18 21:06:03,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:03,229 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2023-02-18 21:06:03,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 21:06:03,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:03,231 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] [2023-02-18 21:06:03,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:03,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2023-02-18 21:06:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:03,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115040387] [2023-02-18 21:06:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 21:06:03,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115040387] [2023-02-18 21:06:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115040387] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837466648] [2023-02-18 21:06:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:03,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:03,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:03,608 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) [2023-02-18 21:06:03,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 21:06:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:03,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 21:06:03,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:03,719 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 15 treesize of output 11 [2023-02-18 21:06:03,758 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 21:06:03,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:03,760 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 1 case distinctions, treesize of input 35 treesize of output 46 [2023-02-18 21:06:03,817 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 23 treesize of output 7 [2023-02-18 21:06:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:03,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:12,786 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 24 treesize of output 22 [2023-02-18 21:06:12,788 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 50 treesize of output 44 [2023-02-18 21:06:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 21:06:12,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837466648] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:12,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:12,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 32 [2023-02-18 21:06:12,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217722917] [2023-02-18 21:06:12,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:12,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 21:06:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 21:06:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=894, Unknown=1, NotChecked=0, Total=992 [2023-02-18 21:06:12,880 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:13,986 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2023-02-18 21:06:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 21:06:13,987 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 21:06:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:13,988 INFO L225 Difference]: With dead ends: 162 [2023-02-18 21:06:13,988 INFO L226 Difference]: Without dead ends: 162 [2023-02-18 21:06:13,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=591, Invalid=3568, Unknown=1, NotChecked=0, Total=4160 [2023-02-18 21:06:13,990 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 294 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:13,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 289 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:06:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-18 21:06:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2023-02-18 21:06:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2023-02-18 21:06:13,994 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 31 [2023-02-18 21:06:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:13,995 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2023-02-18 21:06:13,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2023-02-18 21:06:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 21:06:13,996 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:13,996 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] [2023-02-18 21:06:14,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:14,202 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,SelfDestructingSolverStorable15 [2023-02-18 21:06:14,203 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1886210463, now seen corresponding path program 1 times [2023-02-18 21:06:14,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:14,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579953937] [2023-02-18 21:06:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:14,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:14,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579953937] [2023-02-18 21:06:14,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579953937] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:14,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055025901] [2023-02-18 21:06:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:14,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:14,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:14,260 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) [2023-02-18 21:06:14,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 21:06:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 21:06:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:14,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:14,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055025901] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:14,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:14,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 21:06:14,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355313824] [2023-02-18 21:06:14,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:14,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 21:06:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 21:06:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:06:14,362 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:14,399 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2023-02-18 21:06:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 21:06:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 21:06:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:14,401 INFO L225 Difference]: With dead ends: 174 [2023-02-18 21:06:14,401 INFO L226 Difference]: Without dead ends: 174 [2023-02-18 21:06:14,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-18 21:06:14,401 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:14,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 148 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 21:06:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-18 21:06:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 162. [2023-02-18 21:06:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 161 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2023-02-18 21:06:14,407 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 40 [2023-02-18 21:06:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:14,407 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2023-02-18 21:06:14,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2023-02-18 21:06:14,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 21:06:14,408 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:14,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:14,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:14,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-18 21:06:14,615 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2023-02-18 21:06:14,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:14,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463076453] [2023-02-18 21:06:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:14,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463076453] [2023-02-18 21:06:14,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463076453] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494309945] [2023-02-18 21:06:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:14,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:14,827 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) [2023-02-18 21:06:14,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 21:06:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:14,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-18 21:06:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:14,930 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 [2023-02-18 21:06:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:14,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:15,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494309945] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:15,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:15,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-02-18 21:06:15,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449141921] [2023-02-18 21:06:15,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:15,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 21:06:15,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 21:06:15,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:06:15,081 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:15,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:15,623 INFO L93 Difference]: Finished difference Result 289 states and 326 transitions. [2023-02-18 21:06:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 21:06:15,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 21:06:15,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:15,628 INFO L225 Difference]: With dead ends: 289 [2023-02-18 21:06:15,628 INFO L226 Difference]: Without dead ends: 289 [2023-02-18 21:06:15,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 21:06:15,629 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 384 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:15,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 363 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:06:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-02-18 21:06:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 183. [2023-02-18 21:06:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.2415730337078652) internal successors, (221), 182 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2023-02-18 21:06:15,636 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 42 [2023-02-18 21:06:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:15,636 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2023-02-18 21:06:15,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2023-02-18 21:06:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 21:06:15,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:15,637 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:15,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:15,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 21:06:15,844 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 1 times [2023-02-18 21:06:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054175278] [2023-02-18 21:06:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:15,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054175278] [2023-02-18 21:06:15,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054175278] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765131002] [2023-02-18 21:06:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:15,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:15,965 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) [2023-02-18 21:06:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 21:06:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:16,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 21:06:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:16,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 21:06:16,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765131002] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:16,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:16,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-18 21:06:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896094448] [2023-02-18 21:06:16,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:16,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 21:06:16,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 21:06:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:06:16,120 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:16,267 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2023-02-18 21:06:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 21:06:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-02-18 21:06:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:16,268 INFO L225 Difference]: With dead ends: 187 [2023-02-18 21:06:16,268 INFO L226 Difference]: Without dead ends: 187 [2023-02-18 21:06:16,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-02-18 21:06:16,269 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:16,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 196 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:06:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-18 21:06:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2023-02-18 21:06:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 170 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2023-02-18 21:06:16,272 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 46 [2023-02-18 21:06:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:16,272 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2023-02-18 21:06:16,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2023-02-18 21:06:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 21:06:16,273 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:16,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-18 21:06:16,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:16,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:16,484 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2023-02-18 21:06:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:16,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595893692] [2023-02-18 21:06:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 21:06:16,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595893692] [2023-02-18 21:06:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595893692] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932836187] [2023-02-18 21:06:16,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:06:16,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:16,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:16,593 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) [2023-02-18 21:06:16,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 21:06:16,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 21:06:16,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:16,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 21:06:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 21:06:16,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 21:06:16,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932836187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:16,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:16,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 21:06:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349679079] [2023-02-18 21:06:16,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:16,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 21:06:16,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 21:06:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 21:06:16,747 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:16,842 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2023-02-18 21:06:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 21:06:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-18 21:06:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:16,843 INFO L225 Difference]: With dead ends: 171 [2023-02-18 21:06:16,843 INFO L226 Difference]: Without dead ends: 171 [2023-02-18 21:06:16,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-18 21:06:16,844 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 66 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:16,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 165 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:06:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-02-18 21:06:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2023-02-18 21:06:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 161 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2023-02-18 21:06:16,848 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 47 [2023-02-18 21:06:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:16,848 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2023-02-18 21:06:16,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2023-02-18 21:06:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 21:06:16,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:16,849 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-02-18 21:06:16,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:17,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:17,056 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2023-02-18 21:06:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337914833] [2023-02-18 21:06:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 21:06:17,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337914833] [2023-02-18 21:06:17,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337914833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:17,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716071837] [2023-02-18 21:06:17,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 21:06:17,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:17,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:17,243 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) [2023-02-18 21:06:17,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 21:06:17,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 21:06:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 21:06:17,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:17,337 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 [2023-02-18 21:06:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 21:06:17,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 21:06:17,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716071837] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:17,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:17,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2023-02-18 21:06:17,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392218130] [2023-02-18 21:06:17,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:17,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 21:06:17,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 21:06:17,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-02-18 21:06:17,513 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 19 states, 18 states have (on average 5.5) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:17,965 INFO L93 Difference]: Finished difference Result 213 states and 246 transitions. [2023-02-18 21:06:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 21:06:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.5) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-18 21:06:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:17,966 INFO L225 Difference]: With dead ends: 213 [2023-02-18 21:06:17,966 INFO L226 Difference]: Without dead ends: 213 [2023-02-18 21:06:17,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 21:06:17,968 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 240 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:17,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 195 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:06:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-02-18 21:06:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2023-02-18 21:06:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2023-02-18 21:06:17,971 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 52 [2023-02-18 21:06:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:17,972 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2023-02-18 21:06:17,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.5) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2023-02-18 21:06:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 21:06:17,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:17,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-18 21:06:17,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:18,178 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,SelfDestructingSolverStorable20 [2023-02-18 21:06:18,179 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2023-02-18 21:06:18,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:18,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535258064] [2023-02-18 21:06:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 21:06:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535258064] [2023-02-18 21:06:18,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535258064] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082614965] [2023-02-18 21:06:18,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:06:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:18,293 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) [2023-02-18 21:06:18,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 21:06:18,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 21:06:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 21:06:18,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 21:06:18,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 21:06:18,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082614965] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:18,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:18,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-18 21:06:18,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098177145] [2023-02-18 21:06:18,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 21:06:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:18,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 21:06:18,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-18 21:06:18,451 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:18,555 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2023-02-18 21:06:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 21:06:18,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-18 21:06:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:18,556 INFO L225 Difference]: With dead ends: 185 [2023-02-18 21:06:18,556 INFO L226 Difference]: Without dead ends: 185 [2023-02-18 21:06:18,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-02-18 21:06:18,557 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:18,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 190 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:06:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-18 21:06:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2023-02-18 21:06:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1479289940828403) internal successors, (194), 172 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2023-02-18 21:06:18,560 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 56 [2023-02-18 21:06:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:18,560 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2023-02-18 21:06:18,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2023-02-18 21:06:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 21:06:18,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:18,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-18 21:06:18,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:18,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:18,766 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:18,767 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2023-02-18 21:06:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:18,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947647854] [2023-02-18 21:06:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:18,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 21:06:19,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947647854] [2023-02-18 21:06:19,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947647854] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723793730] [2023-02-18 21:06:19,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 21:06:19,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:19,189 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) [2023-02-18 21:06:19,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 21:06:19,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 21:06:19,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 21:06:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:19,404 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 [2023-02-18 21:06:19,408 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 [2023-02-18 21:06:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:06:19,423 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 12 treesize of output 14 [2023-02-18 21:06:19,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:19,425 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 15 [2023-02-18 21:06:19,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:19,455 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 12 treesize of output 28 [2023-02-18 21:06:19,484 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 [2023-02-18 21:06:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:06:19,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:19,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 43 treesize of output 68 [2023-02-18 21:06:19,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:19,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 83 [2023-02-18 21:06:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 21:06:19,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:19,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:19,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 95 [2023-02-18 21:06:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 21:06:20,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723793730] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:20,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:20,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-02-18 21:06:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439938651] [2023-02-18 21:06:20,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:20,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 21:06:20,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 21:06:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2023-02-18 21:06:20,365 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:21,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:21,811 INFO L93 Difference]: Finished difference Result 201 states and 218 transitions. [2023-02-18 21:06:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 21:06:21,812 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-18 21:06:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:21,812 INFO L225 Difference]: With dead ends: 201 [2023-02-18 21:06:21,813 INFO L226 Difference]: Without dead ends: 201 [2023-02-18 21:06:21,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=550, Invalid=1802, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 21:06:21,814 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 365 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:21,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 337 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:06:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-18 21:06:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2023-02-18 21:06:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 192 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2023-02-18 21:06:21,822 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 60 [2023-02-18 21:06:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:21,822 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2023-02-18 21:06:21,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.064516129032258) internal successors, (157), 32 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2023-02-18 21:06:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 21:06:21,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:21,823 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-02-18 21:06:21,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:22,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:22,029 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:22,030 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2023-02-18 21:06:22,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:22,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957014767] [2023-02-18 21:06:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:22,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 21:06:22,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957014767] [2023-02-18 21:06:22,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957014767] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:22,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92371551] [2023-02-18 21:06:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:22,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:22,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:22,365 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) [2023-02-18 21:06:22,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 21:06:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:22,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 21:06:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:06:22,549 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 17 treesize of output 19 [2023-02-18 21:06:22,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:22,552 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 15 [2023-02-18 21:06:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:22,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:22,667 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 76 treesize of output 72 [2023-02-18 21:06:22,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:22,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 86 [2023-02-18 21:06:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:22,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92371551] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:22,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:22,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-02-18 21:06:22,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587047741] [2023-02-18 21:06:22,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 21:06:22,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 21:06:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-02-18 21:06:22,746 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:23,227 INFO L93 Difference]: Finished difference Result 302 states and 340 transitions. [2023-02-18 21:06:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 21:06:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-18 21:06:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:23,229 INFO L225 Difference]: With dead ends: 302 [2023-02-18 21:06:23,229 INFO L226 Difference]: Without dead ends: 302 [2023-02-18 21:06:23,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 21:06:23,230 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 296 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:23,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 440 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:06:23,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-02-18 21:06:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 210. [2023-02-18 21:06:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1553398058252426) internal successors, (238), 209 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2023-02-18 21:06:23,234 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 75 [2023-02-18 21:06:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:23,235 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2023-02-18 21:06:23,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2023-02-18 21:06:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 21:06:23,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:23,235 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-02-18 21:06:23,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:23,442 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,SelfDestructingSolverStorable23 [2023-02-18 21:06:23,442 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2023-02-18 21:06:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442871809] [2023-02-18 21:06:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442871809] [2023-02-18 21:06:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442871809] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:23,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755810199] [2023-02-18 21:06:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:23,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:23,753 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) [2023-02-18 21:06:23,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 21:06:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 21:06:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:23,899 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 [2023-02-18 21:06:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:23,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:24,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755810199] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:24,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:24,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2023-02-18 21:06:24,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242160022] [2023-02-18 21:06:24,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:24,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 21:06:24,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:24,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 21:06:24,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-02-18 21:06:24,137 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:25,494 INFO L93 Difference]: Finished difference Result 431 states and 481 transitions. [2023-02-18 21:06:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 21:06:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-02-18 21:06:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:25,497 INFO L225 Difference]: With dead ends: 431 [2023-02-18 21:06:25,497 INFO L226 Difference]: Without dead ends: 431 [2023-02-18 21:06:25,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=517, Invalid=2239, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 21:06:25,498 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 772 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:25,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 490 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 21:06:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-02-18 21:06:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 280. [2023-02-18 21:06:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 276 states have (on average 1.184782608695652) internal successors, (327), 279 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 327 transitions. [2023-02-18 21:06:25,505 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 327 transitions. Word has length 76 [2023-02-18 21:06:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:25,505 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 327 transitions. [2023-02-18 21:06:25,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 327 transitions. [2023-02-18 21:06:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 21:06:25,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:25,506 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2023-02-18 21:06:25,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:25,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:25,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2023-02-18 21:06:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:25,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924025319] [2023-02-18 21:06:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:25,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:25,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924025319] [2023-02-18 21:06:25,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924025319] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:25,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761326661] [2023-02-18 21:06:25,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:06:25,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:25,866 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) [2023-02-18 21:06:25,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 21:06:25,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 21:06:25,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 21:06:25,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:26,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 21:06:26,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761326661] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:26,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:26,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-02-18 21:06:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461272923] [2023-02-18 21:06:26,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:26,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 21:06:26,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:26,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 21:06:26,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-02-18 21:06:26,083 INFO L87 Difference]: Start difference. First operand 280 states and 327 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:26,292 INFO L93 Difference]: Finished difference Result 281 states and 320 transitions. [2023-02-18 21:06:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 21:06:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-02-18 21:06:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:26,294 INFO L225 Difference]: With dead ends: 281 [2023-02-18 21:06:26,294 INFO L226 Difference]: Without dead ends: 281 [2023-02-18 21:06:26,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2023-02-18 21:06:26,295 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 307 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:26,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 253 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 21:06:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-18 21:06:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 263. [2023-02-18 21:06:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 262 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2023-02-18 21:06:26,299 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 80 [2023-02-18 21:06:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:26,300 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2023-02-18 21:06:26,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2023-02-18 21:06:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-18 21:06:26,300 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:26,301 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2023-02-18 21:06:26,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:26,509 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1306836429, now seen corresponding path program 3 times [2023-02-18 21:06:26,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:26,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133261716] [2023-02-18 21:06:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:26,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 202 proven. 78 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 21:06:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133261716] [2023-02-18 21:06:26,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133261716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53902490] [2023-02-18 21:06:26,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 21:06:26,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:26,689 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) [2023-02-18 21:06:26,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 21:06:26,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 21:06:26,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:26,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 21:06:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:26,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:26,829 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 20 treesize of output 40 [2023-02-18 21:06:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-02-18 21:06:27,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:27,709 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 57 treesize of output 53 [2023-02-18 21:06:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2023-02-18 21:06:27,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53902490] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:27,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:27,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-02-18 21:06:27,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890824394] [2023-02-18 21:06:27,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:27,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 21:06:27,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:27,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 21:06:27,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-02-18 21:06:27,743 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 24 states, 24 states have (on average 5.708333333333333) internal successors, (137), 24 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:31,540 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2023-02-18 21:06:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 21:06:31,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.708333333333333) internal successors, (137), 24 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-02-18 21:06:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:31,541 INFO L225 Difference]: With dead ends: 264 [2023-02-18 21:06:31,542 INFO L226 Difference]: Without dead ends: 264 [2023-02-18 21:06:31,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=512, Invalid=1938, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 21:06:31,542 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 259 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:31,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 295 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-02-18 21:06:31,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-18 21:06:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2023-02-18 21:06:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 258 states have (on average 1.12015503875969) internal successors, (289), 260 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 289 transitions. [2023-02-18 21:06:31,547 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 289 transitions. Word has length 109 [2023-02-18 21:06:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:31,547 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 289 transitions. [2023-02-18 21:06:31,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.708333333333333) internal successors, (137), 24 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 289 transitions. [2023-02-18 21:06:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-18 21:06:31,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:31,549 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2023-02-18 21:06:31,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:31,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1962904546, now seen corresponding path program 2 times [2023-02-18 21:06:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:31,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434421764] [2023-02-18 21:06:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 186 proven. 134 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 21:06:31,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434421764] [2023-02-18 21:06:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434421764] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:31,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372205187] [2023-02-18 21:06:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:06:31,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:31,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:31,981 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) [2023-02-18 21:06:31,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 21:06:32,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-18 21:06:32,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:32,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 21:06:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:32,101 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 [2023-02-18 21:06:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-02-18 21:06:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-02-18 21:06:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372205187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:32,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:32,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2023-02-18 21:06:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72120647] [2023-02-18 21:06:32,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 21:06:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 21:06:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-18 21:06:32,696 INFO L87 Difference]: Start difference. First operand 261 states and 289 transitions. Second operand has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:33,093 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2023-02-18 21:06:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 21:06:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-02-18 21:06:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:33,095 INFO L225 Difference]: With dead ends: 295 [2023-02-18 21:06:33,095 INFO L226 Difference]: Without dead ends: 295 [2023-02-18 21:06:33,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 21:06:33,096 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:33,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 259 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:06:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-02-18 21:06:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 220. [2023-02-18 21:06:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.073394495412844) internal successors, (234), 219 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 234 transitions. [2023-02-18 21:06:33,100 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 234 transitions. Word has length 115 [2023-02-18 21:06:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:33,100 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 234 transitions. [2023-02-18 21:06:33,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 234 transitions. [2023-02-18 21:06:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-18 21:06:33,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:33,102 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:33,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:33,307 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,SelfDestructingSolverStorable27 [2023-02-18 21:06:33,308 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1985613403, now seen corresponding path program 1 times [2023-02-18 21:06:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239916795] [2023-02-18 21:06:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 539 proven. 87 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-02-18 21:06:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239916795] [2023-02-18 21:06:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239916795] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649634860] [2023-02-18 21:06:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:33,641 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) [2023-02-18 21:06:33,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 21:06:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 21:06:33,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 631 proven. 130 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-18 21:06:33,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 631 proven. 130 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-18 21:06:33,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649634860] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:33,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:33,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-02-18 21:06:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743217567] [2023-02-18 21:06:33,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 21:06:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 21:06:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-18 21:06:33,992 INFO L87 Difference]: Start difference. First operand 220 states and 234 transitions. Second operand has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:34,298 INFO L93 Difference]: Finished difference Result 247 states and 261 transitions. [2023-02-18 21:06:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-18 21:06:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2023-02-18 21:06:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:34,299 INFO L225 Difference]: With dead ends: 247 [2023-02-18 21:06:34,299 INFO L226 Difference]: Without dead ends: 247 [2023-02-18 21:06:34,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 349 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 21:06:34,300 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:34,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 307 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:06:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-02-18 21:06:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 235. [2023-02-18 21:06:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0686695278969958) internal successors, (249), 234 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 249 transitions. [2023-02-18 21:06:34,304 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 249 transitions. Word has length 183 [2023-02-18 21:06:34,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:34,304 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 249 transitions. [2023-02-18 21:06:34,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 249 transitions. [2023-02-18 21:06:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-02-18 21:06:34,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:34,306 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:34,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:34,512 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,SelfDestructingSolverStorable28 [2023-02-18 21:06:34,512 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:34,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1035428845, now seen corresponding path program 2 times [2023-02-18 21:06:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833343504] [2023-02-18 21:06:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:34,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 602 proven. 305 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-18 21:06:34,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833343504] [2023-02-18 21:06:34,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833343504] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792600054] [2023-02-18 21:06:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:06:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:34,886 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) [2023-02-18 21:06:34,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 21:06:35,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 21:06:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 21:06:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 648 proven. 259 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-18 21:06:35,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 648 proven. 259 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-02-18 21:06:35,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792600054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:35,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:35,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2023-02-18 21:06:35,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683728904] [2023-02-18 21:06:35,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:35,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 21:06:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 21:06:35,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-02-18 21:06:35,250 INFO L87 Difference]: Start difference. First operand 235 states and 249 transitions. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:35,506 INFO L93 Difference]: Finished difference Result 256 states and 270 transitions. [2023-02-18 21:06:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 21:06:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2023-02-18 21:06:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:35,507 INFO L225 Difference]: With dead ends: 256 [2023-02-18 21:06:35,508 INFO L226 Difference]: Without dead ends: 256 [2023-02-18 21:06:35,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2023-02-18 21:06:35,509 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 95 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:35,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 576 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:06:35,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-18 21:06:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2023-02-18 21:06:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0653061224489795) internal successors, (261), 246 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 261 transitions. [2023-02-18 21:06:35,512 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 261 transitions. Word has length 193 [2023-02-18 21:06:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:35,512 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 261 transitions. [2023-02-18 21:06:35,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 261 transitions. [2023-02-18 21:06:35,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-02-18 21:06:35,513 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:35,513 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:35,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-18 21:06:35,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:35,713 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1941601421, now seen corresponding path program 3 times [2023-02-18 21:06:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:35,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797738218] [2023-02-18 21:06:35,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:35,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 686 proven. 334 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2023-02-18 21:06:36,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797738218] [2023-02-18 21:06:36,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797738218] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:36,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854621280] [2023-02-18 21:06:36,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 21:06:36,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:36,050 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) [2023-02-18 21:06:36,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 21:06:36,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 21:06:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 21:06:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 476 proven. 34 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-18 21:06:36,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 476 proven. 34 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-02-18 21:06:36,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854621280] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:36,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:36,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2023-02-18 21:06:36,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855839238] [2023-02-18 21:06:36,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:36,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 21:06:36,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:36,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 21:06:36,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-02-18 21:06:36,498 INFO L87 Difference]: Start difference. First operand 247 states and 261 transitions. Second operand has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:37,376 INFO L93 Difference]: Finished difference Result 434 states and 462 transitions. [2023-02-18 21:06:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-18 21:06:37,377 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2023-02-18 21:06:37,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:37,378 INFO L225 Difference]: With dead ends: 434 [2023-02-18 21:06:37,378 INFO L226 Difference]: Without dead ends: 434 [2023-02-18 21:06:37,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 21:06:37,380 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 545 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:37,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 543 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:06:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-18 21:06:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2023-02-18 21:06:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.074698795180723) internal successors, (446), 416 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 446 transitions. [2023-02-18 21:06:37,387 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 446 transitions. Word has length 201 [2023-02-18 21:06:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:37,388 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 446 transitions. [2023-02-18 21:06:37,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 446 transitions. [2023-02-18 21:06:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-02-18 21:06:37,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:37,390 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 18, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-18 21:06:37,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:37,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:37,597 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 315042624, now seen corresponding path program 4 times [2023-02-18 21:06:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:37,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622982688] [2023-02-18 21:06:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1211 proven. 583 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-02-18 21:06:38,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:38,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622982688] [2023-02-18 21:06:38,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622982688] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588362665] [2023-02-18 21:06:38,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 21:06:38,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:38,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:38,085 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) [2023-02-18 21:06:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 21:06:40,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 21:06:40,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 21:06:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1290 proven. 49 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-02-18 21:06:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1290 proven. 49 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2023-02-18 21:06:40,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588362665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:40,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:40,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-02-18 21:06:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160059393] [2023-02-18 21:06:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:40,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 21:06:40,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 21:06:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-02-18 21:06:40,591 INFO L87 Difference]: Start difference. First operand 417 states and 446 transitions. Second operand has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:41,546 INFO L93 Difference]: Finished difference Result 452 states and 481 transitions. [2023-02-18 21:06:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 21:06:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2023-02-18 21:06:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:41,548 INFO L225 Difference]: With dead ends: 452 [2023-02-18 21:06:41,549 INFO L226 Difference]: Without dead ends: 452 [2023-02-18 21:06:41,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 477 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1131, Invalid=3425, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 21:06:41,550 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 189 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:41,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 712 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 21:06:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-02-18 21:06:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 437. [2023-02-18 21:06:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 435 states have (on average 1.071264367816092) internal successors, (466), 436 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 466 transitions. [2023-02-18 21:06:41,557 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 466 transitions. Word has length 249 [2023-02-18 21:06:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:41,557 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 466 transitions. [2023-02-18 21:06:41,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 466 transitions. [2023-02-18 21:06:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-02-18 21:06:41,560 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:41,560 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-18 21:06:41,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:41,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:41,771 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:41,771 INFO L85 PathProgramCache]: Analyzing trace with hash 464852166, now seen corresponding path program 5 times [2023-02-18 21:06:41,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:41,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460051003] [2023-02-18 21:06:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:41,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1387 proven. 567 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-18 21:06:42,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:42,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460051003] [2023-02-18 21:06:42,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460051003] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:42,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735283967] [2023-02-18 21:06:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 21:06:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:42,275 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) [2023-02-18 21:06:42,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 21:06:46,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 21:06:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 21:06:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1460 proven. 494 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-18 21:06:46,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1479 proven. 475 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-18 21:06:46,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735283967] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:46,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:46,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2023-02-18 21:06:46,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889146877] [2023-02-18 21:06:46,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:46,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 21:06:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 21:06:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2023-02-18 21:06:46,344 INFO L87 Difference]: Start difference. First operand 437 states and 466 transitions. Second operand has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:46,906 INFO L93 Difference]: Finished difference Result 448 states and 476 transitions. [2023-02-18 21:06:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 21:06:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2023-02-18 21:06:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:46,909 INFO L225 Difference]: With dead ends: 448 [2023-02-18 21:06:46,909 INFO L226 Difference]: Without dead ends: 448 [2023-02-18 21:06:46,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 499 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=742, Invalid=2014, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 21:06:46,910 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 113 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:46,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 727 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 21:06:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-02-18 21:06:46,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 442. [2023-02-18 21:06:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.0681818181818181) internal successors, (470), 441 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 470 transitions. [2023-02-18 21:06:46,919 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 470 transitions. Word has length 257 [2023-02-18 21:06:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:46,919 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 470 transitions. [2023-02-18 21:06:46,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 470 transitions. [2023-02-18 21:06:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-02-18 21:06:46,922 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:46,922 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-18 21:06:46,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 21:06:47,135 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,SelfDestructingSolverStorable32 [2023-02-18 21:06:47,135 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -948471375, now seen corresponding path program 6 times [2023-02-18 21:06:47,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296791386] [2023-02-18 21:06:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:47,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1030 proven. 995 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-02-18 21:06:47,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:47,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296791386] [2023-02-18 21:06:47,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296791386] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:47,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122491516] [2023-02-18 21:06:47,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 21:06:47,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:47,697 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) [2023-02-18 21:06:47,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 21:06:48,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-18 21:06:48,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:06:48,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 21:06:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1213 proven. 641 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-02-18 21:06:49,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1313 proven. 541 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2023-02-18 21:06:49,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122491516] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:49,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:49,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2023-02-18 21:06:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121599251] [2023-02-18 21:06:49,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:49,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-18 21:06:49,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:49,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-18 21:06:49,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 21:06:49,254 INFO L87 Difference]: Start difference. First operand 442 states and 470 transitions. Second operand has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:50,293 INFO L93 Difference]: Finished difference Result 459 states and 487 transitions. [2023-02-18 21:06:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 21:06:50,293 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2023-02-18 21:06:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:50,294 INFO L225 Difference]: With dead ends: 459 [2023-02-18 21:06:50,295 INFO L226 Difference]: Without dead ends: 459 [2023-02-18 21:06:50,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 497 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1361, Invalid=4491, Unknown=0, NotChecked=0, Total=5852 [2023-02-18 21:06:50,296 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 220 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:50,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 640 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 21:06:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-18 21:06:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 450. [2023-02-18 21:06:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 448 states have (on average 1.0669642857142858) internal successors, (478), 449 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 478 transitions. [2023-02-18 21:06:50,304 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 478 transitions. Word has length 262 [2023-02-18 21:06:50,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:50,304 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 478 transitions. [2023-02-18 21:06:50,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 478 transitions. [2023-02-18 21:06:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-18 21:06:50,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:50,306 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2023-02-18 21:06:50,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-02-18 21:06:50,515 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,SelfDestructingSolverStorable33 [2023-02-18 21:06:50,515 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1500764660, now seen corresponding path program 7 times [2023-02-18 21:06:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:50,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239902908] [2023-02-18 21:06:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:50,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2112 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2023-02-18 21:06:52,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239902908] [2023-02-18 21:06:52,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239902908] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:52,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705368515] [2023-02-18 21:06:52,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 21:06:52,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:52,756 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) [2023-02-18 21:06:52,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 21:06:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-18 21:06:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:06:53,055 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 [2023-02-18 21:06:53,058 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 [2023-02-18 21:06:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 21:06:53,091 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 12 treesize of output 14 [2023-02-18 21:06:53,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,094 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 15 [2023-02-18 21:06:53,161 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,162 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 15 [2023-02-18 21:06:53,166 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 12 treesize of output 14 [2023-02-18 21:06:53,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,258 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 12 treesize of output 28 [2023-02-18 21:06:53,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,263 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 15 [2023-02-18 21:06:53,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,386 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 12 treesize of output 28 [2023-02-18 21:06:53,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,390 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 15 [2023-02-18 21:06:53,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,499 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 15 [2023-02-18 21:06:53,501 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 12 treesize of output 14 [2023-02-18 21:06:53,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,652 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 15 [2023-02-18 21:06:53,655 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 12 treesize of output 14 [2023-02-18 21:06:53,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,795 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 12 treesize of output 28 [2023-02-18 21:06:53,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:53,800 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 15 [2023-02-18 21:06:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-02-18 21:06:53,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:06:54,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:54,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2023-02-18 21:06:54,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:54,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2023-02-18 21:06:54,648 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:54,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2023-02-18 21:06:54,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:54,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 77 [2023-02-18 21:06:55,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:55,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 81 [2023-02-18 21:06:55,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 21:06:55,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 85 [2023-02-18 21:06:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2023-02-18 21:06:55,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705368515] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:06:55,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:06:55,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 15] total 63 [2023-02-18 21:06:55,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77920442] [2023-02-18 21:06:55,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:06:55,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-18 21:06:55,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:06:55,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-18 21:06:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3545, Unknown=0, NotChecked=0, Total=4032 [2023-02-18 21:06:55,803 INFO L87 Difference]: Start difference. First operand 450 states and 478 transitions. Second operand has 64 states, 63 states have (on average 6.523809523809524) internal successors, (411), 64 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:59,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:06:59,279 INFO L93 Difference]: Finished difference Result 1408 states and 1515 transitions. [2023-02-18 21:06:59,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 21:06:59,280 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 6.523809523809524) internal successors, (411), 64 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2023-02-18 21:06:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:06:59,284 INFO L225 Difference]: With dead ends: 1408 [2023-02-18 21:06:59,284 INFO L226 Difference]: Without dead ends: 1408 [2023-02-18 21:06:59,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 489 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1406, Invalid=6784, Unknown=0, NotChecked=0, Total=8190 [2023-02-18 21:06:59,286 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1058 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 2198 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 21:06:59,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 2198 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 21:06:59,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-02-18 21:06:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1399. [2023-02-18 21:06:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1397 states have (on average 1.0780243378668575) internal successors, (1506), 1398 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1506 transitions. [2023-02-18 21:06:59,304 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1506 transitions. Word has length 266 [2023-02-18 21:06:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:06:59,304 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 1506 transitions. [2023-02-18 21:06:59,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 6.523809523809524) internal successors, (411), 64 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:06:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1506 transitions. [2023-02-18 21:06:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-02-18 21:06:59,306 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:06:59,307 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 22, 22, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:06:59,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-18 21:06:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-18 21:06:59,514 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:06:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:06:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -384764090, now seen corresponding path program 4 times [2023-02-18 21:06:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:06:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733958195] [2023-02-18 21:06:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:06:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:06:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:06:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1517 proven. 367 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2023-02-18 21:06:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:06:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733958195] [2023-02-18 21:06:59,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733958195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:06:59,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469090299] [2023-02-18 21:06:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 21:06:59,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:06:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:06:59,925 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) [2023-02-18 21:06:59,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 21:07:59,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 21:07:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:07:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 21:07:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:07:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1460 proven. 190 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2023-02-18 21:07:59,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:07:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1460 proven. 190 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2023-02-18 21:07:59,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469090299] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:07:59,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:07:59,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 34 [2023-02-18 21:07:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040300793] [2023-02-18 21:07:59,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:07:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 21:07:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:07:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 21:07:59,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 21:07:59,716 INFO L87 Difference]: Start difference. First operand 1399 states and 1506 transitions. Second operand has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:08:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:08:00,448 INFO L93 Difference]: Finished difference Result 1732 states and 1849 transitions. [2023-02-18 21:08:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 21:08:00,449 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2023-02-18 21:08:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:08:00,452 INFO L225 Difference]: With dead ends: 1732 [2023-02-18 21:08:00,452 INFO L226 Difference]: Without dead ends: 1732 [2023-02-18 21:08:00,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 580 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=889, Invalid=4367, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 21:08:00,454 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 471 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:08:00,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 620 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:08:00,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2023-02-18 21:08:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1324. [2023-02-18 21:08:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1322 states have (on average 1.073373676248109) internal successors, (1419), 1323 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:08:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1419 transitions. [2023-02-18 21:08:00,472 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1419 transitions. Word has length 304 [2023-02-18 21:08:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:08:00,472 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 1419 transitions. [2023-02-18 21:08:00,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:08:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1419 transitions. [2023-02-18 21:08:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2023-02-18 21:08:00,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:08:00,475 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:08:00,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 21:08:00,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:08:00,698 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:08:00,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:08:00,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1244124498, now seen corresponding path program 5 times [2023-02-18 21:08:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:08:00,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881115317] [2023-02-18 21:08:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:08:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:08:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:08:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 0 proven. 3942 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2023-02-18 21:08:01,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:08:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881115317] [2023-02-18 21:08:01,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881115317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:08:01,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681790122] [2023-02-18 21:08:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 21:08:01,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:08:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:08:01,121 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) [2023-02-18 21:08:01,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 21:08:23,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-18 21:08:23,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:08:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 21:08:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:08:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 1306 proven. 2866 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2023-02-18 21:08:23,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:08:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 1306 proven. 2866 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2023-02-18 21:08:23,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681790122] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:08:23,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:08:23,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 20] total 33 [2023-02-18 21:08:23,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228205551] [2023-02-18 21:08:23,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:08:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 21:08:23,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:08:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 21:08:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 21:08:23,725 INFO L87 Difference]: Start difference. First operand 1324 states and 1419 transitions. Second operand has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:08:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:08:24,730 INFO L93 Difference]: Finished difference Result 1227 states and 1306 transitions. [2023-02-18 21:08:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-18 21:08:24,731 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 364 [2023-02-18 21:08:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:08:24,734 INFO L225 Difference]: With dead ends: 1227 [2023-02-18 21:08:24,734 INFO L226 Difference]: Without dead ends: 1227 [2023-02-18 21:08:24,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 710 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3263 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2087, Invalid=8419, Unknown=0, NotChecked=0, Total=10506 [2023-02-18 21:08:24,737 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 791 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:08:24,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 582 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:08:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2023-02-18 21:08:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1194. [2023-02-18 21:08:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1192 states have (on average 1.066275167785235) internal successors, (1271), 1193 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:08:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1271 transitions. [2023-02-18 21:08:24,749 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1271 transitions. Word has length 364 [2023-02-18 21:08:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:08:24,750 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1271 transitions. [2023-02-18 21:08:24,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:08:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1271 transitions. [2023-02-18 21:08:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-02-18 21:08:24,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:08:24,753 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 43, 43, 40, 40, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:08:24,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 21:08:24,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-18 21:08:24,969 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:08:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:08:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 569902066, now seen corresponding path program 6 times [2023-02-18 21:08:24,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:08:24,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796948995] [2023-02-18 21:08:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:08:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:08:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:08:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 5578 proven. 321 refuted. 0 times theorem prover too weak. 3071 trivial. 0 not checked. [2023-02-18 21:08:25,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:08:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796948995] [2023-02-18 21:08:25,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796948995] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:08:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049920208] [2023-02-18 21:08:25,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 21:08:25,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:08:25,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:08:25,723 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) [2023-02-18 21:08:25,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 21:09:03,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-18 21:09:03,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:09:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 21:09:03,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:09:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 4306 proven. 2667 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2023-02-18 21:09:03,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:09:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 4306 proven. 2667 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2023-02-18 21:09:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049920208] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:09:03,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:09:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2023-02-18 21:09:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252792878] [2023-02-18 21:09:03,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:09:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-18 21:09:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:09:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-18 21:09:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2023-02-18 21:09:03,906 INFO L87 Difference]: Start difference. First operand 1194 states and 1271 transitions. Second operand has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:09:11,555 INFO L93 Difference]: Finished difference Result 7190 states and 7890 transitions. [2023-02-18 21:09:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2023-02-18 21:09:11,556 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 494 [2023-02-18 21:09:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:09:11,574 INFO L225 Difference]: With dead ends: 7190 [2023-02-18 21:09:11,574 INFO L226 Difference]: Without dead ends: 7190 [2023-02-18 21:09:11,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1384 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72269 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=22227, Invalid=152079, Unknown=0, NotChecked=0, Total=174306 [2023-02-18 21:09:11,587 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3955 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3955 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 21:09:11,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3955 Valid, 837 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 21:09:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2023-02-18 21:09:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 4893. [2023-02-18 21:09:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4891 states have (on average 1.0811694949907995) internal successors, (5288), 4892 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 5288 transitions. [2023-02-18 21:09:11,649 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 5288 transitions. Word has length 494 [2023-02-18 21:09:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:09:11,650 INFO L495 AbstractCegarLoop]: Abstraction has 4893 states and 5288 transitions. [2023-02-18 21:09:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 5288 transitions. [2023-02-18 21:09:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-02-18 21:09:11,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:09:11,660 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 92, 52, 52, 52, 52, 52, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 21:09:11,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-02-18 21:09:11,873 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,SelfDestructingSolverStorable37 [2023-02-18 21:09:11,874 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:09:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:09:11,874 INFO L85 PathProgramCache]: Analyzing trace with hash 708196276, now seen corresponding path program 7 times [2023-02-18 21:09:11,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:09:11,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492474229] [2023-02-18 21:09:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:09:11,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:09:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:09:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 12449 proven. 3405 refuted. 0 times theorem prover too weak. 9720 trivial. 0 not checked. [2023-02-18 21:09:13,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:09:13,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492474229] [2023-02-18 21:09:13,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492474229] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:09:13,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949861991] [2023-02-18 21:09:13,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 21:09:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:09:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:09:13,041 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) [2023-02-18 21:09:13,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 21:09:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:09:13,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 21:09:13,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:09:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 2496 proven. 49 refuted. 0 times theorem prover too weak. 23029 trivial. 0 not checked. [2023-02-18 21:09:13,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:09:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 2496 proven. 49 refuted. 0 times theorem prover too weak. 23029 trivial. 0 not checked. [2023-02-18 21:09:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949861991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:09:13,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:09:13,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2023-02-18 21:09:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837856432] [2023-02-18 21:09:13,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:09:13,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 21:09:13,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:09:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 21:09:13,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-02-18 21:09:13,729 INFO L87 Difference]: Start difference. First operand 4893 states and 5288 transitions. Second operand has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:09:14,340 INFO L93 Difference]: Finished difference Result 1420 states and 1526 transitions. [2023-02-18 21:09:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-18 21:09:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 758 [2023-02-18 21:09:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:09:14,343 INFO L225 Difference]: With dead ends: 1420 [2023-02-18 21:09:14,343 INFO L226 Difference]: Without dead ends: 1420 [2023-02-18 21:09:14,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1502 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1214, Invalid=4042, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 21:09:14,344 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 588 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 21:09:14,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 313 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 21:09:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2023-02-18 21:09:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1420. [2023-02-18 21:09:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1418 states have (on average 1.076163610719323) internal successors, (1526), 1419 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1526 transitions. [2023-02-18 21:09:14,357 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1526 transitions. Word has length 758 [2023-02-18 21:09:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:09:14,358 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1526 transitions. [2023-02-18 21:09:14,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1526 transitions. [2023-02-18 21:09:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2023-02-18 21:09:14,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:09:14,364 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 77, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2023-02-18 21:09:14,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-18 21:09:14,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 21:09:14,574 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:09:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:09:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1147359220, now seen corresponding path program 8 times [2023-02-18 21:09:14,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:09:14,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961866712] [2023-02-18 21:09:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:09:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:09:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:09:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 9074 proven. 429 refuted. 0 times theorem prover too weak. 20268 trivial. 0 not checked. [2023-02-18 21:09:16,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:09:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961866712] [2023-02-18 21:09:16,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961866712] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:09:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930269124] [2023-02-18 21:09:16,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 21:09:16,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:09:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:09:16,092 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) [2023-02-18 21:09:16,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 21:09:16,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 21:09:16,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:09:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 3389 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 21:09:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:09:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 18216 proven. 1184 refuted. 0 times theorem prover too weak. 10371 trivial. 0 not checked. [2023-02-18 21:09:16,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:09:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 18216 proven. 1184 refuted. 0 times theorem prover too weak. 10371 trivial. 0 not checked. [2023-02-18 21:09:17,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930269124] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:09:17,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:09:17,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2023-02-18 21:09:17,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18940876] [2023-02-18 21:09:17,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:09:17,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-18 21:09:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:09:17,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-18 21:09:17,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 21:09:17,077 INFO L87 Difference]: Start difference. First operand 1420 states and 1526 transitions. Second operand has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:09:18,347 INFO L93 Difference]: Finished difference Result 1501 states and 1605 transitions. [2023-02-18 21:09:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-18 21:09:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 858 [2023-02-18 21:09:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:09:18,351 INFO L225 Difference]: With dead ends: 1501 [2023-02-18 21:09:18,351 INFO L226 Difference]: Without dead ends: 1501 [2023-02-18 21:09:18,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1683 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1260, Invalid=5382, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 21:09:18,352 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 197 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 21:09:18,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1387 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 21:09:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2023-02-18 21:09:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1465. [2023-02-18 21:09:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1463 states have (on average 1.072453861927546) internal successors, (1569), 1464 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1569 transitions. [2023-02-18 21:09:18,368 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1569 transitions. Word has length 858 [2023-02-18 21:09:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:09:18,369 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 1569 transitions. [2023-02-18 21:09:18,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:18,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1569 transitions. [2023-02-18 21:09:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2023-02-18 21:09:18,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:09:18,377 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 77, 77, 77, 77, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2023-02-18 21:09:18,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 21:09:18,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 21:09:18,587 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:09:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:09:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1704168183, now seen corresponding path program 9 times [2023-02-18 21:09:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:09:18,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591032760] [2023-02-18 21:09:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:09:18,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:09:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:09:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 19820 proven. 2329 refuted. 0 times theorem prover too weak. 10527 trivial. 0 not checked. [2023-02-18 21:09:20,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:09:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591032760] [2023-02-18 21:09:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591032760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:09:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183732681] [2023-02-18 21:09:20,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 21:09:20,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:09:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:09:20,101 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) [2023-02-18 21:09:20,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 21:09:23,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-18 21:09:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 21:09:23,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 21:09:23,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 21:09:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 11542 proven. 16946 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2023-02-18 21:09:23,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 21:09:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 11542 proven. 16946 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2023-02-18 21:09:23,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183732681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 21:09:23,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 21:09:23,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 39 [2023-02-18 21:09:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249232782] [2023-02-18 21:09:23,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 21:09:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 21:09:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 21:09:23,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 21:09:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 21:09:23,907 INFO L87 Difference]: Start difference. First operand 1465 states and 1569 transitions. Second operand has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 21:09:24,638 INFO L93 Difference]: Finished difference Result 1493 states and 1590 transitions. [2023-02-18 21:09:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 21:09:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 893 [2023-02-18 21:09:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 21:09:24,643 INFO L225 Difference]: With dead ends: 1493 [2023-02-18 21:09:24,643 INFO L226 Difference]: Without dead ends: 1493 [2023-02-18 21:09:24,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1832 GetRequests, 1749 SyntacticMatches, 18 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=958, Invalid=3464, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 21:09:24,644 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 136 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 21:09:24,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1450 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 21:09:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2023-02-18 21:09:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1481. [2023-02-18 21:09:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1479 states have (on average 1.0669371196754565) internal successors, (1578), 1480 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1578 transitions. [2023-02-18 21:09:24,657 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1578 transitions. Word has length 893 [2023-02-18 21:09:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 21:09:24,658 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1578 transitions. [2023-02-18 21:09:24,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 21:09:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1578 transitions. [2023-02-18 21:09:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2023-02-18 21:09:24,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 21:09:24,666 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 84, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2023-02-18 21:09:24,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 21:09:24,878 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,SelfDestructingSolverStorable40 [2023-02-18 21:09:24,879 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-02-18 21:09:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 21:09:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1721483028, now seen corresponding path program 10 times [2023-02-18 21:09:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 21:09:24,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21832706] [2023-02-18 21:09:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 21:09:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 21:09:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 21:09:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35021 backedges. 11088 proven. 552 refuted. 0 times theorem prover too weak. 23381 trivial. 0 not checked. [2023-02-18 21:09:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 21:09:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21832706] [2023-02-18 21:09:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21832706] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 21:09:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415129688] [2023-02-18 21:09:26,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 21:09:26,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 21:09:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 21:09:26,509 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) [2023-02-18 21:09:26,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process