./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c 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/ArraysWithLenghtAtDeclaration_-read.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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:48:36,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:48:36,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:48:37,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:48:37,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:48:37,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:48:37,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:48:37,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:48:37,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:48:37,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:48:37,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:48:37,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:48:37,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:48:37,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:48:37,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:48:37,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:48:37,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:48:37,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:48:37,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:48:37,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:48:37,075 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:48:37,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:48:37,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:48:37,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:48:37,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:48:37,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:48:37,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:48:37,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:48:37,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:48:37,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:48:37,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:48:37,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:48:37,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:48:37,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:48:37,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:48:37,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:48:37,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:48:37,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:48:37,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:48:37,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:48:37,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:48:37,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:48:37,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:48:37,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:48:37,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:48:37,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:48:37,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:48:37,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:48:37,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:48:37,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:48:37,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:48:37,126 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:48:37,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:48:37,127 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:48:37,127 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:48:37,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:48:37,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:48:37,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:48:37,128 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:48:37,128 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:48:37,128 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:48:37,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:48:37,129 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:48:37,129 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:48:37,129 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:48:37,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:48:37,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:48:37,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:48:37,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:48:37,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:48:37,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:48:37,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:48:37,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:48:37,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2022-07-12 18:48:37,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:48:37,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:48:37,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:48:37,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:48:37,409 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:48:37,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-07-12 18:48:37,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f31eeda3e/ca86e519f2f14f19bd7d807d716e04d7/FLAG31ef01872 [2022-07-12 18:48:37,866 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:48:37,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-07-12 18:48:37,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f31eeda3e/ca86e519f2f14f19bd7d807d716e04d7/FLAG31ef01872 [2022-07-12 18:48:37,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f31eeda3e/ca86e519f2f14f19bd7d807d716e04d7 [2022-07-12 18:48:37,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:48:37,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:48:37,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:48:37,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:48:37,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:48:37,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:48:37" (1/1) ... [2022-07-12 18:48:37,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa4a2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:37, skipping insertion in model container [2022-07-12 18:48:37,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:48:37" (1/1) ... [2022-07-12 18:48:37,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:48:37,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:48:38,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:48:38,069 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:48:38,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:48:38,093 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:48:38,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38 WrapperNode [2022-07-12 18:48:38,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:48:38,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:48:38,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:48:38,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:48:38,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,127 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-12 18:48:38,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:48:38,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:48:38,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:48:38,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:48:38,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:48:38,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:48:38,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:48:38,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:48:38,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (1/1) ... [2022-07-12 18:48:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:48:38,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:38,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:48:38,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:48:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:48:38,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:48:38,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:48:38,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:48:38,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 18:48:38,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:48:38,293 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:48:38,294 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:48:38,408 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:48:38,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:48:38,414 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 18:48:38,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:48:38 BoogieIcfgContainer [2022-07-12 18:48:38,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:48:38,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:48:38,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:48:38,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:48:38,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:48:37" (1/3) ... [2022-07-12 18:48:38,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8b7455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:48:38, skipping insertion in model container [2022-07-12 18:48:38,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:48:38" (2/3) ... [2022-07-12 18:48:38,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8b7455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:48:38, skipping insertion in model container [2022-07-12 18:48:38,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:48:38" (3/3) ... [2022-07-12 18:48:38,423 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2022-07-12 18:48:38,437 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:48:38,438 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-12 18:48:38,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:48:38,491 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19d46fa8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35053a33 [2022-07-12 18:48:38,506 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-12 18:48:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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) [2022-07-12 18:48:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-12 18:48:38,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:38,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-12 18:48:38,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-07-12 18:48:38,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:38,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303579204] [2022-07-12 18:48:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:38,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:38,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303579204] [2022-07-12 18:48:38,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303579204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:38,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:38,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:48:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145001873] [2022-07-12 18:48:38,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:38,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:48:38,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:48:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:48:38,729 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-07-12 18:48:38,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:38,785 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-12 18:48:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:48:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2022-07-12 18:48:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:38,792 INFO L225 Difference]: With dead ends: 59 [2022-07-12 18:48:38,792 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:48:38,794 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 [2022-07-12 18:48:38,797 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:38,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:48:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-07-12 18:48:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 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) [2022-07-12 18:48:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-12 18:48:38,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-07-12 18:48:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:38,828 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-12 18:48:38,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2022-07-12 18:48:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-12 18:48:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:48:38,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:38,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:48:38,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:48:38,830 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-07-12 18:48:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044217023] [2022-07-12 18:48:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:38,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044217023] [2022-07-12 18:48:38,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044217023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:38,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:38,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:48:38,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675790836] [2022-07-12 18:48:38,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:38,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:48:38,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:38,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:48:38,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:48:38,871 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-12 18:48:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:38,904 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-12 18:48:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:48:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-07-12 18:48:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:38,906 INFO L225 Difference]: With dead ends: 58 [2022-07-12 18:48:38,906 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 18:48:38,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:48:38,908 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:38,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 18:48:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-07-12 18:48:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 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) [2022-07-12 18:48:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-12 18:48:38,914 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-12 18:48:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:38,914 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-12 18:48:38,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-07-12 18:48:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-12 18:48:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:48:38,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:38,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:48:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:48:38,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-07-12 18:48:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046938945] [2022-07-12 18:48:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:38,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046938945] [2022-07-12 18:48:38,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046938945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:38,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:38,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:48:38,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790495663] [2022-07-12 18:48:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:48:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:48:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:48:38,982 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-07-12 18:48:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:39,017 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-12 18:48:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:48:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-07-12 18:48:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:39,020 INFO L225 Difference]: With dead ends: 32 [2022-07-12 18:48:39,021 INFO L226 Difference]: Without dead ends: 32 [2022-07-12 18:48:39,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:48:39,024 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:39,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-12 18:48:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-12 18:48:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 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) [2022-07-12 18:48:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-12 18:48:39,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-12 18:48:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:39,032 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-12 18:48:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-07-12 18:48:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-12 18:48:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:48:39,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:39,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:48:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:48:39,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-07-12 18:48:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:39,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646206285] [2022-07-12 18:48:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:39,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:39,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646206285] [2022-07-12 18:48:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646206285] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:39,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:39,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:48:39,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691726573] [2022-07-12 18:48:39,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:48:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:48:39,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:48:39,107 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-07-12 18:48:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:39,186 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-12 18:48:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:48:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-07-12 18:48:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:39,188 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:48:39,189 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:48:39,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:48:39,190 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:39,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:48:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-12 18:48:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 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) [2022-07-12 18:48:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-12 18:48:39,202 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-12 18:48:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:39,203 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-12 18:48:39,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-07-12 18:48:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-12 18:48:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 18:48:39,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:39,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:48:39,205 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-07-12 18:48:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:39,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678711470] [2022-07-12 18:48:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:39,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:39,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678711470] [2022-07-12 18:48:39,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678711470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:39,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:48:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089107646] [2022-07-12 18:48:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:48:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:48:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:48:39,262 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-07-12 18:48:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:39,312 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-12 18:48:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:48:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-07-12 18:48:39,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:39,313 INFO L225 Difference]: With dead ends: 60 [2022-07-12 18:48:39,313 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:48:39,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:48:39,314 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:39,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:39,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:48:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-07-12 18:48:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 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) [2022-07-12 18:48:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-12 18:48:39,319 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-07-12 18:48:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:39,319 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-12 18:48:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-07-12 18:48:39,320 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-12 18:48:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 18:48:39,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:39,320 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 18:48:39,321 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-07-12 18:48:39,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:39,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159115083] [2022-07-12 18:48:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:39,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:39,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159115083] [2022-07-12 18:48:39,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159115083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:39,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33189606] [2022-07-12 18:48:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:39,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:39,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:48:39,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:48:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 18:48:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:39,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:39,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33189606] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:39,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:39,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-12 18:48:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840098186] [2022-07-12 18:48:39,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:39,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:48:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:48:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:48:39,592 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2022-07-12 18:48:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:39,677 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-07-12 18:48:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:48:39,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 10 [2022-07-12 18:48:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:39,685 INFO L225 Difference]: With dead ends: 130 [2022-07-12 18:48:39,690 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 18:48:39,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:48:39,691 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:39,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 18:48:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-07-12 18:48:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 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) [2022-07-12 18:48:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-12 18:48:39,697 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-07-12 18:48:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:39,697 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-12 18:48:39,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2022-07-12 18:48:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-12 18:48:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:48:39,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:39,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:39,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-12 18:48:39,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-07-12 18:48:39,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:39,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241632084] [2022-07-12 18:48:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:39,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241632084] [2022-07-12 18:48:39,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241632084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:39,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21789130] [2022-07-12 18:48:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:39,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:39,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:48:39,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:48:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:48:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:40,101 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:48:40,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:48:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:40,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:40,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21789130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:40,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:40,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-12 18:48:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077263945] [2022-07-12 18:48:40,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:48:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:48:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:48:40,299 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-12 18:48:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:40,487 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-07-12 18:48:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 18:48:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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 [2022-07-12 18:48:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:40,489 INFO L225 Difference]: With dead ends: 129 [2022-07-12 18:48:40,489 INFO L226 Difference]: Without dead ends: 129 [2022-07-12 18:48:40,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:48:40,490 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:40,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-12 18:48:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-07-12 18:48:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-07-12 18:48:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-12 18:48:40,496 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-07-12 18:48:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:40,496 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-12 18:48:40,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 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) [2022-07-12 18:48:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-12 18:48:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 18:48:40,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:40,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:40,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:40,711 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,SelfDestructingSolverStorable6 [2022-07-12 18:48:40,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-07-12 18:48:40,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:40,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732492187] [2022-07-12 18:48:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732492187] [2022-07-12 18:48:40,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732492187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:40,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993493149] [2022-07-12 18:48:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:40,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:40,780 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) [2022-07-12 18:48:40,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:48:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:48:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:40,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:40,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993493149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:40,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:40,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 18:48:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479315636] [2022-07-12 18:48:40,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:40,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:48:40,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:48:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:48:40,924 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-07-12 18:48:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:41,074 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-07-12 18:48:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:48:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 12 [2022-07-12 18:48:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:41,075 INFO L225 Difference]: With dead ends: 88 [2022-07-12 18:48:41,075 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 18:48:41,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-12 18:48:41,080 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:41,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 18:48:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-07-12 18:48:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) 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) [2022-07-12 18:48:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-12 18:48:41,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-07-12 18:48:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:41,085 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-12 18:48:41,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-07-12 18:48:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-12 18:48:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:48:41,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:41,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:41,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:41,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:41,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:41,309 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-07-12 18:48:41,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:41,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263233186] [2022-07-12 18:48:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:41,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 18:48:41,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263233186] [2022-07-12 18:48:41,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263233186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:41,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:41,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:48:41,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492625715] [2022-07-12 18:48:41,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:41,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:48:41,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:48:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:48:41,380 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:41,396 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-12 18:48:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:48:41,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-12 18:48:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:41,397 INFO L225 Difference]: With dead ends: 46 [2022-07-12 18:48:41,397 INFO L226 Difference]: Without dead ends: 46 [2022-07-12 18:48:41,398 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 [2022-07-12 18:48:41,398 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:41,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-12 18:48:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-12 18:48:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 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) [2022-07-12 18:48:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-12 18:48:41,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-07-12 18:48:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:41,402 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-12 18:48:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-12 18:48:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-12 18:48:41,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:41,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:41,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 18:48:41,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-07-12 18:48:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569986007] [2022-07-12 18:48:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:41,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:41,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569986007] [2022-07-12 18:48:41,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569986007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:41,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:41,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:48:41,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071656786] [2022-07-12 18:48:41,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:48:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:41,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:48:41,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:48:41,494 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-12 18:48:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:41,518 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-07-12 18:48:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:48:41,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 [2022-07-12 18:48:41,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:41,519 INFO L225 Difference]: With dead ends: 76 [2022-07-12 18:48:41,519 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 18:48:41,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:48:41,521 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:41,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:41,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 18:48:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-12 18:48:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-07-12 18:48:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-12 18:48:41,527 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-07-12 18:48:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:41,528 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-12 18:48:41,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-12 18:48:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-12 18:48:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 18:48:41,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:41,529 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:41,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 18:48:41,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:41,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-07-12 18:48:41,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:41,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120727654] [2022-07-12 18:48:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:41,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:41,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:41,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120727654] [2022-07-12 18:48:41,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120727654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:41,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706693861] [2022-07-12 18:48:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:41,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:41,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:41,600 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) [2022-07-12 18:48:41,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:48:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:41,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 18:48:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:41,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:41,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-07-12 18:48:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:41,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706693861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:41,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:41,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-12 18:48:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840458275] [2022-07-12 18:48:41,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:41,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:48:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:48:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:48:41,861 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-12 18:48:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:41,934 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-07-12 18:48:41,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:48:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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 [2022-07-12 18:48:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:41,936 INFO L225 Difference]: With dead ends: 80 [2022-07-12 18:48:41,936 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 18:48:41,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:48:41,937 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:41,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 18:48:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-07-12 18:48:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 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) [2022-07-12 18:48:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-12 18:48:41,949 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-07-12 18:48:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:41,950 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-12 18:48:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-12 18:48:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-12 18:48:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 18:48:41,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:41,952 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-07-12 18:48:41,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:42,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:42,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-07-12 18:48:42,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:42,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635252618] [2022-07-12 18:48:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:42,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:42,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:42,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635252618] [2022-07-12 18:48:42,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635252618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:42,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:48:42,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 18:48:42,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528361301] [2022-07-12 18:48:42,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:42,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 18:48:42,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:42,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 18:48:42,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 18:48:42,252 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-07-12 18:48:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:42,332 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-07-12 18:48:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:48:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 25 [2022-07-12 18:48:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:42,333 INFO L225 Difference]: With dead ends: 86 [2022-07-12 18:48:42,333 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 18:48:42,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:48:42,334 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:42,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 18:48:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-12 18:48:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 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) [2022-07-12 18:48:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-07-12 18:48:42,338 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-07-12 18:48:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:42,338 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-07-12 18:48:42,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-07-12 18:48:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-07-12 18:48:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:48:42,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:42,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:42,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 18:48:42,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-07-12 18:48:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:42,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790696895] [2022-07-12 18:48:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:42,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:42,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790696895] [2022-07-12 18:48:42,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790696895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:42,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765198156] [2022-07-12 18:48:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:42,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:42,402 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) [2022-07-12 18:48:42,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:48:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:42,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:48:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:48:42,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:48:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765198156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:42,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:48:42,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-12 18:48:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232218308] [2022-07-12 18:48:42,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:42,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:48:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:48:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:48:42,625 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:42,636 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-07-12 18:48:42,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:48:42,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-12 18:48:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:42,637 INFO L225 Difference]: With dead ends: 62 [2022-07-12 18:48:42,637 INFO L226 Difference]: Without dead ends: 60 [2022-07-12 18:48:42,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 18:48:42,638 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:42,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-12 18:48:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-12 18:48:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-12 18:48:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 states have internal predecessors, (64), 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) [2022-07-12 18:48:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-07-12 18:48:42,641 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-07-12 18:48:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:42,641 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-07-12 18:48:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-07-12 18:48:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 18:48:42,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:42,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:42,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 18:48:42,862 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 [2022-07-12 18:48:42,862 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:42,863 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-07-12 18:48:42,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:42,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670463779] [2022-07-12 18:48:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:42,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670463779] [2022-07-12 18:48:42,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670463779] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:42,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331483981] [2022-07-12 18:48:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:42,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:42,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:42,905 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) [2022-07-12 18:48:42,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:48:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:42,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:48:42,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:43,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-12 18:48:43,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 18:48:43,120 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 18:48:43,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-12 18:48:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:43,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:43,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-07-12 18:48:43,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 24 [2022-07-12 18:48:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:48:43,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331483981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:43,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2022-07-12 18:48:43,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185620749] [2022-07-12 18:48:43,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:43,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:48:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:48:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:48:43,304 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) [2022-07-12 18:48:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:43,566 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-07-12 18:48:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:48:43,567 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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 [2022-07-12 18:48:43,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:43,567 INFO L225 Difference]: With dead ends: 101 [2022-07-12 18:48:43,567 INFO L226 Difference]: Without dead ends: 101 [2022-07-12 18:48:43,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2022-07-12 18:48:43,568 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:43,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 144 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:48:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-12 18:48:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-07-12 18:48:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-12 18:48:43,571 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-07-12 18:48:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:43,571 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-12 18:48:43,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 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) [2022-07-12 18:48:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-12 18:48:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 18:48:43,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:43,573 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:43,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:43,773 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 [2022-07-12 18:48:43,774 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-07-12 18:48:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:43,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893068641] [2022-07-12 18:48:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:43,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:43,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:43,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893068641] [2022-07-12 18:48:43,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893068641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:43,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191541186] [2022-07-12 18:48:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:43,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:43,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:43,847 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) [2022-07-12 18:48:43,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:48:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:43,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 18:48:43,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:43,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 18:48:44,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191541186] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:44,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:44,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-12 18:48:44,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823811281] [2022-07-12 18:48:44,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:44,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:48:44,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:44,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:48:44,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:48:44,061 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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) [2022-07-12 18:48:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:44,210 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-07-12 18:48:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:48:44,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-12 18:48:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:44,212 INFO L225 Difference]: With dead ends: 66 [2022-07-12 18:48:44,212 INFO L226 Difference]: Without dead ends: 66 [2022-07-12 18:48:44,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:48:44,214 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:44,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-12 18:48:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-12 18:48:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 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) [2022-07-12 18:48:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-12 18:48:44,220 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-07-12 18:48:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:44,220 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-12 18:48:44,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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) [2022-07-12 18:48:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-12 18:48:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 18:48:44,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:44,223 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:44,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:44,438 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 [2022-07-12 18:48:44,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-07-12 18:48:44,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:44,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736188771] [2022-07-12 18:48:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:44,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:44,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:44,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736188771] [2022-07-12 18:48:44,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736188771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168854704] [2022-07-12 18:48:44,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:44,522 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) [2022-07-12 18:48:44,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:48:44,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:44,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:48:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:44,606 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:48:44,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:48:44,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-07-12 18:48:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:44,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:44,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168854704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:44,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:44,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-07-12 18:48:44,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394870410] [2022-07-12 18:48:44,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:44,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 18:48:44,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 18:48:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 18:48:44,924 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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) [2022-07-12 18:48:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:45,007 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-12 18:48:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:48:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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 39 [2022-07-12 18:48:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:45,009 INFO L225 Difference]: With dead ends: 158 [2022-07-12 18:48:45,010 INFO L226 Difference]: Without dead ends: 158 [2022-07-12 18:48:45,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-07-12 18:48:45,010 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:45,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-12 18:48:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-07-12 18:48:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 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) [2022-07-12 18:48:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-07-12 18:48:45,016 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-07-12 18:48:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:45,016 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-07-12 18:48:45,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 states have internal predecessors, (69), 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) [2022-07-12 18:48:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-07-12 18:48:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 18:48:45,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:45,020 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:45,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:45,247 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 [2022-07-12 18:48:45,248 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:45,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-07-12 18:48:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:45,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139536642] [2022-07-12 18:48:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 18:48:45,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:45,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139536642] [2022-07-12 18:48:45,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139536642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:45,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340442149] [2022-07-12 18:48:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:45,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:45,332 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) [2022-07-12 18:48:45,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:48:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:48:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:48:45,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 18:48:45,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340442149] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:45,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:45,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-07-12 18:48:45,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210447033] [2022-07-12 18:48:45,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 18:48:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:45,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 18:48:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-12 18:48:45,575 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-07-12 18:48:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:45,780 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-12 18:48:45,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 18:48:45,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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 [2022-07-12 18:48:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:45,781 INFO L225 Difference]: With dead ends: 165 [2022-07-12 18:48:45,781 INFO L226 Difference]: Without dead ends: 165 [2022-07-12 18:48:45,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:48:45,782 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:45,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 80 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-12 18:48:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-07-12 18:48:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 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) [2022-07-12 18:48:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-07-12 18:48:45,785 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-07-12 18:48:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:45,793 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-07-12 18:48:45,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 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) [2022-07-12 18:48:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-07-12 18:48:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 18:48:45,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:45,794 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:45,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:45,999 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 [2022-07-12 18:48:45,999 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-07-12 18:48:46,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:46,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040283515] [2022-07-12 18:48:46,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:46,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 18:48:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040283515] [2022-07-12 18:48:46,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040283515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769054975] [2022-07-12 18:48:46,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:46,052 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) [2022-07-12 18:48:46,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 18:48:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:48:46,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:46,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:46,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-07-12 18:48:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:46,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769054975] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:46,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:46,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-07-12 18:48:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626608931] [2022-07-12 18:48:46,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:46,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 18:48:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 18:48:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-12 18:48:46,501 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2022-07-12 18:48:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:46,658 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2022-07-12 18:48:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:48:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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 49 [2022-07-12 18:48:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:46,659 INFO L225 Difference]: With dead ends: 153 [2022-07-12 18:48:46,659 INFO L226 Difference]: Without dead ends: 153 [2022-07-12 18:48:46,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-12 18:48:46,660 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:46,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 108 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-12 18:48:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2022-07-12 18:48:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.119718309859155) internal successors, (159), 146 states have internal predecessors, (159), 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) [2022-07-12 18:48:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2022-07-12 18:48:46,663 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 49 [2022-07-12 18:48:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:46,664 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2022-07-12 18:48:46,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 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) [2022-07-12 18:48:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2022-07-12 18:48:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 18:48:46,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:46,664 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-12 18:48:46,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:46,865 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 [2022-07-12 18:48:46,865 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:46,865 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-07-12 18:48:46,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:46,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278554676] [2022-07-12 18:48:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:46,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:46,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278554676] [2022-07-12 18:48:46,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278554676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:46,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878943569] [2022-07-12 18:48:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:46,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:46,957 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) [2022-07-12 18:48:46,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 18:48:47,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 18:48:47,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:47,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 18:48:47,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878943569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:47,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:47,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-12 18:48:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127044348] [2022-07-12 18:48:47,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:47,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:48:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:48:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:48:47,300 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2022-07-12 18:48:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:47,685 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2022-07-12 18:48:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 18:48:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 64 [2022-07-12 18:48:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:47,687 INFO L225 Difference]: With dead ends: 199 [2022-07-12 18:48:47,687 INFO L226 Difference]: Without dead ends: 199 [2022-07-12 18:48:47,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:48:47,688 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:47,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 105 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:48:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-12 18:48:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2022-07-12 18:48:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1) internal successors, (154), 144 states have internal predecessors, (154), 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) [2022-07-12 18:48:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2022-07-12 18:48:47,691 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 64 [2022-07-12 18:48:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:47,691 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2022-07-12 18:48:47,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2022-07-12 18:48:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2022-07-12 18:48:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-12 18:48:47,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:47,692 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-12 18:48:47,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:47,900 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 [2022-07-12 18:48:47,901 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2022-07-12 18:48:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:47,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873531871] [2022-07-12 18:48:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 18:48:48,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:48,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873531871] [2022-07-12 18:48:48,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873531871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:48,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884558963] [2022-07-12 18:48:48,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:48:48,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:48,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:48,037 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) [2022-07-12 18:48:48,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 18:48:48,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:48:48,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:48:48,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:48,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:48:48,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:48:48,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-07-12 18:48:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-12 18:48:48,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:48:48,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884558963] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:48,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:48:48,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2022-07-12 18:48:48,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047749640] [2022-07-12 18:48:48,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:48,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:48:48,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:48:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:48:48,386 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-07-12 18:48:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:48,420 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-07-12 18:48:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 18:48:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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 [2022-07-12 18:48:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:48,421 INFO L225 Difference]: With dead ends: 143 [2022-07-12 18:48:48,422 INFO L226 Difference]: Without dead ends: 143 [2022-07-12 18:48:48,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-12 18:48:48,422 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:48,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:48:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-12 18:48:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2022-07-12 18:48:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:48:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-07-12 18:48:48,425 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2022-07-12 18:48:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:48,425 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-07-12 18:48:48,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-07-12 18:48:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-07-12 18:48:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 18:48:48,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:48,426 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:48,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:48,635 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 [2022-07-12 18:48:48,635 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2022-07-12 18:48:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336793443] [2022-07-12 18:48:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 18:48:48,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336793443] [2022-07-12 18:48:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336793443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:48,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720888544] [2022-07-12 18:48:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:48,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:48,728 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) [2022-07-12 18:48:48,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 18:48:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 18:48:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 18:48:48,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 18:48:49,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720888544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:49,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:49,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-12 18:48:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102327282] [2022-07-12 18:48:49,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 18:48:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:49,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 18:48:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-12 18:48:49,092 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 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) [2022-07-12 18:48:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:49,374 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2022-07-12 18:48:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 18:48:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 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 [2022-07-12 18:48:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:49,375 INFO L225 Difference]: With dead ends: 113 [2022-07-12 18:48:49,375 INFO L226 Difference]: Without dead ends: 113 [2022-07-12 18:48:49,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-07-12 18:48:49,376 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:49,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 100 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:48:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-12 18:48:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-07-12 18:48:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 states have internal predecessors, (113), 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) [2022-07-12 18:48:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-07-12 18:48:49,379 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2022-07-12 18:48:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:49,379 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-07-12 18:48:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 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) [2022-07-12 18:48:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-07-12 18:48:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-12 18:48:49,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:49,380 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:48:49,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 18:48:49,602 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 [2022-07-12 18:48:49,602 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2022-07-12 18:48:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:49,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822959990] [2022-07-12 18:48:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:49,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-12 18:48:49,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822959990] [2022-07-12 18:48:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822959990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387561537] [2022-07-12 18:48:49,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:49,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:49,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:49,681 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) [2022-07-12 18:48:49,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 18:48:49,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:48:49,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:49,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:48:49,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-12 18:48:50,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:48:50,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387561537] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:48:50,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:48:50,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-12 18:48:50,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232158937] [2022-07-12 18:48:50,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:48:50,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:48:50,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:48:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:48:50,172 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-07-12 18:48:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:50,184 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-07-12 18:48:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:48:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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 85 [2022-07-12 18:48:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:50,185 INFO L225 Difference]: With dead ends: 110 [2022-07-12 18:48:50,185 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 18:48:50,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-12 18:48:50,187 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:50,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-07-12 18:48:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 18:48:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-12 18:48:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 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) [2022-07-12 18:48:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-12 18:48:50,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2022-07-12 18:48:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:50,190 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-12 18:48:50,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-07-12 18:48:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-12 18:48:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-12 18:48:50,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:50,192 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-12 18:48:50,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 18:48:50,399 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 [2022-07-12 18:48:50,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-07-12 18:48:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:50,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477814232] [2022-07-12 18:48:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-12 18:48:50,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:50,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477814232] [2022-07-12 18:48:50,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477814232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400244305] [2022-07-12 18:48:50,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:48:50,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:50,472 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) [2022-07-12 18:48:50,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 18:48:50,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:48:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 18:48:50,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:50,563 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:48:50,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:48:50,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-12 18:48:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 227 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-12 18:48:50,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-12 18:48:51,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400244305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:51,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:51,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-07-12 18:48:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198014665] [2022-07-12 18:48:51,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:51,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 18:48:51,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 18:48:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-12 18:48:51,053 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 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) [2022-07-12 18:48:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:51,272 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-07-12 18:48:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 18:48:51,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 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 91 [2022-07-12 18:48:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:51,273 INFO L225 Difference]: With dead ends: 117 [2022-07-12 18:48:51,273 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 18:48:51,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:48:51,274 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:51,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 64 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 18:48:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2022-07-12 18:48:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 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) [2022-07-12 18:48:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-12 18:48:51,276 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-07-12 18:48:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-12 18:48:51,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 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) [2022-07-12 18:48:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-12 18:48:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-12 18:48:51,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:51,277 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-12 18:48:51,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:51,491 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 [2022-07-12 18:48:51,491 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:51,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-07-12 18:48:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648746177] [2022-07-12 18:48:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-12 18:48:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648746177] [2022-07-12 18:48:51,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648746177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500692054] [2022-07-12 18:48:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:51,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:51,652 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) [2022-07-12 18:48:51,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 18:48:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-12 18:48:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:51,752 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:48:51,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:48:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-12 18:48:52,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-12 18:48:52,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500692054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:52,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:52,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-07-12 18:48:52,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544266608] [2022-07-12 18:48:52,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 18:48:52,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 18:48:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-12 18:48:52,411 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 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) [2022-07-12 18:48:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:52,775 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2022-07-12 18:48:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:48:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 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 92 [2022-07-12 18:48:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:52,776 INFO L225 Difference]: With dead ends: 159 [2022-07-12 18:48:52,776 INFO L226 Difference]: Without dead ends: 159 [2022-07-12 18:48:52,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-07-12 18:48:52,777 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:52,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 88 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:48:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-12 18:48:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2022-07-12 18:48:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 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) [2022-07-12 18:48:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-07-12 18:48:52,780 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2022-07-12 18:48:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:52,781 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-07-12 18:48:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 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) [2022-07-12 18:48:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-07-12 18:48:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-12 18:48:52,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:52,782 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-12 18:48:52,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-12 18:48:52,999 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 [2022-07-12 18:48:52,999 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2022-07-12 18:48:53,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:53,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706501048] [2022-07-12 18:48:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 84 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-12 18:48:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706501048] [2022-07-12 18:48:53,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706501048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278711520] [2022-07-12 18:48:53,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:48:53,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:53,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:53,157 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) [2022-07-12 18:48:53,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 18:48:53,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:48:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:48:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-12 18:48:53,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:54,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 30 [2022-07-12 18:48:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-12 18:48:54,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278711520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:54,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:54,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-07-12 18:48:54,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687377642] [2022-07-12 18:48:54,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:54,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 18:48:54,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 18:48:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 18:48:54,667 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 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) [2022-07-12 18:48:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:55,811 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2022-07-12 18:48:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 18:48:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 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 122 [2022-07-12 18:48:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:55,813 INFO L225 Difference]: With dead ends: 167 [2022-07-12 18:48:55,813 INFO L226 Difference]: Without dead ends: 167 [2022-07-12 18:48:55,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1268, Invalid=4432, Unknown=0, NotChecked=0, Total=5700 [2022-07-12 18:48:55,815 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:55,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 122 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:48:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-12 18:48:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-07-12 18:48:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 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) [2022-07-12 18:48:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-07-12 18:48:55,819 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2022-07-12 18:48:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:55,819 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-07-12 18:48:55,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 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) [2022-07-12 18:48:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-07-12 18:48:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-12 18:48:55,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:55,820 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-07-12 18:48:55,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:56,039 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 [2022-07-12 18:48:56,039 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:56,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2022-07-12 18:48:56,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048374199] [2022-07-12 18:48:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 865 proven. 297 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-07-12 18:48:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048374199] [2022-07-12 18:48:56,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048374199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:56,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580310965] [2022-07-12 18:48:56,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:48:56,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:56,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:56,188 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) [2022-07-12 18:48:56,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 18:48:56,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 18:48:56,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:56,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:48:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 936 proven. 249 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-12 18:48:56,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 807 proven. 378 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-12 18:48:56,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580310965] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:56,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:56,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 36 [2022-07-12 18:48:56,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102819029] [2022-07-12 18:48:56,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:56,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 18:48:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:56,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 18:48:56,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 18:48:56,871 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 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) [2022-07-12 18:48:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:48:57,633 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2022-07-12 18:48:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 18:48:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 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 149 [2022-07-12 18:48:57,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:48:57,634 INFO L225 Difference]: With dead ends: 161 [2022-07-12 18:48:57,634 INFO L226 Difference]: Without dead ends: 161 [2022-07-12 18:48:57,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=832, Invalid=3328, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 18:48:57,636 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 418 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:48:57,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 89 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:48:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-12 18:48:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2022-07-12 18:48:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 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) [2022-07-12 18:48:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2022-07-12 18:48:57,639 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2022-07-12 18:48:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:48:57,639 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2022-07-12 18:48:57,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 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) [2022-07-12 18:48:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2022-07-12 18:48:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-12 18:48:57,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:48:57,640 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-07-12 18:48:57,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 18:48:57,857 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 [2022-07-12 18:48:57,857 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:48:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:48:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2022-07-12 18:48:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:48:57,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713949409] [2022-07-12 18:48:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:48:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:48:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:48:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 118 proven. 1328 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-12 18:48:58,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:48:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713949409] [2022-07-12 18:48:58,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713949409] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:48:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338620458] [2022-07-12 18:48:58,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:48:58,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:48:58,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:48:58,021 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) [2022-07-12 18:48:58,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 18:48:58,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:48:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:48:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 18:48:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:48:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 18:48:58,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:48:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 18:48:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338620458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:48:58,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:48:58,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2022-07-12 18:48:58,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465018018] [2022-07-12 18:48:58,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:48:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 18:48:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:48:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 18:48:58,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 18:48:58,868 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 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) [2022-07-12 18:49:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:00,101 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2022-07-12 18:49:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-12 18:49:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 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 154 [2022-07-12 18:49:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:00,103 INFO L225 Difference]: With dead ends: 401 [2022-07-12 18:49:00,103 INFO L226 Difference]: Without dead ends: 401 [2022-07-12 18:49:00,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3118, Invalid=7594, Unknown=0, NotChecked=0, Total=10712 [2022-07-12 18:49:00,106 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 275 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:00,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 98 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 18:49:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-07-12 18:49:00,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2022-07-12 18:49:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 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) [2022-07-12 18:49:00,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2022-07-12 18:49:00,112 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2022-07-12 18:49:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:00,113 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2022-07-12 18:49:00,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 states have internal predecessors, (225), 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) [2022-07-12 18:49:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2022-07-12 18:49:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-12 18:49:00,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:00,116 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-12 18:49:00,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:00,339 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 [2022-07-12 18:49:00,340 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2022-07-12 18:49:00,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:00,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013738017] [2022-07-12 18:49:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:00,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3878 proven. 218 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2022-07-12 18:49:00,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:00,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013738017] [2022-07-12 18:49:00,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013738017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:00,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193135348] [2022-07-12 18:49:00,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:49:00,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:00,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:00,612 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) [2022-07-12 18:49:00,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 18:49:00,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-12 18:49:00,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:00,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:49:00,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3685 proven. 501 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2022-07-12 18:49:01,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3798 proven. 388 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2022-07-12 18:49:01,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193135348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:01,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:01,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-07-12 18:49:01,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423776248] [2022-07-12 18:49:01,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:01,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-12 18:49:01,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:01,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-12 18:49:01,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:49:01,344 INFO L87 Difference]: Start difference. First operand 390 states and 411 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 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) [2022-07-12 18:49:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:02,077 INFO L93 Difference]: Finished difference Result 390 states and 405 transitions. [2022-07-12 18:49:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 18:49:02,079 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 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 314 [2022-07-12 18:49:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:02,081 INFO L225 Difference]: With dead ends: 390 [2022-07-12 18:49:02,081 INFO L226 Difference]: Without dead ends: 390 [2022-07-12 18:49:02,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 18:49:02,082 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 134 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:02,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:49:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-12 18:49:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-12 18:49:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0411311053984575) internal successors, (405), 389 states have internal predecessors, (405), 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) [2022-07-12 18:49:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 405 transitions. [2022-07-12 18:49:02,092 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 405 transitions. Word has length 314 [2022-07-12 18:49:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:02,092 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 405 transitions. [2022-07-12 18:49:02,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 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) [2022-07-12 18:49:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 405 transitions. [2022-07-12 18:49:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-07-12 18:49:02,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:02,096 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 54, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-12 18:49:02,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:02,311 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 [2022-07-12 18:49:02,311 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -525875421, now seen corresponding path program 6 times [2022-07-12 18:49:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866434893] [2022-07-12 18:49:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4649 proven. 311 refuted. 0 times theorem prover too weak. 3113 trivial. 0 not checked. [2022-07-12 18:49:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866434893] [2022-07-12 18:49:02,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866434893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477680049] [2022-07-12 18:49:02,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:49:02,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:02,653 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) [2022-07-12 18:49:02,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 18:49:02,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-12 18:49:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:49:03,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4943 proven. 852 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-07-12 18:49:03,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 5125 proven. 670 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-07-12 18:49:03,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477680049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:03,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:03,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-07-12 18:49:03,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931680316] [2022-07-12 18:49:03,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:03,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-12 18:49:03,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-12 18:49:03,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 18:49:03,688 INFO L87 Difference]: Start difference. First operand 390 states and 405 transitions. Second operand has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 states have internal predecessors, (225), 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) [2022-07-12 18:49:04,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:04,790 INFO L93 Difference]: Finished difference Result 390 states and 400 transitions. [2022-07-12 18:49:04,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-12 18:49:04,790 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 states have internal predecessors, (225), 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 339 [2022-07-12 18:49:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:04,792 INFO L225 Difference]: With dead ends: 390 [2022-07-12 18:49:04,792 INFO L226 Difference]: Without dead ends: 390 [2022-07-12 18:49:04,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1250, Invalid=4602, Unknown=0, NotChecked=0, Total=5852 [2022-07-12 18:49:04,794 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:04,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 107 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:49:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-12 18:49:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-12 18:49:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0282776349614395) internal successors, (400), 389 states have internal predecessors, (400), 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) [2022-07-12 18:49:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 400 transitions. [2022-07-12 18:49:04,800 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 400 transitions. Word has length 339 [2022-07-12 18:49:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:04,801 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 400 transitions. [2022-07-12 18:49:04,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 states have internal predecessors, (225), 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) [2022-07-12 18:49:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 400 transitions. [2022-07-12 18:49:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-12 18:49:04,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:04,805 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 58, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-12 18:49:04,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:05,019 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 [2022-07-12 18:49:05,019 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -814421421, now seen corresponding path program 7 times [2022-07-12 18:49:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:05,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081459290] [2022-07-12 18:49:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:05,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 5360 proven. 419 refuted. 0 times theorem prover too weak. 3452 trivial. 0 not checked. [2022-07-12 18:49:05,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081459290] [2022-07-12 18:49:05,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081459290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869018124] [2022-07-12 18:49:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:49:05,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:05,438 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) [2022-07-12 18:49:05,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 18:49:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:05,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 18:49:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2022-07-12 18:49:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2022-07-12 18:49:06,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869018124] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:06,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:06,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2022-07-12 18:49:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537796715] [2022-07-12 18:49:06,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-12 18:49:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-12 18:49:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-07-12 18:49:06,468 INFO L87 Difference]: Start difference. First operand 390 states and 400 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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) [2022-07-12 18:49:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:07,950 INFO L93 Difference]: Finished difference Result 390 states and 396 transitions. [2022-07-12 18:49:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-12 18:49:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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 359 [2022-07-12 18:49:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:07,953 INFO L225 Difference]: With dead ends: 390 [2022-07-12 18:49:07,953 INFO L226 Difference]: Without dead ends: 390 [2022-07-12 18:49:07,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2022-07-12 18:49:07,955 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:07,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 165 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:49:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-12 18:49:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-12 18:49:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0179948586118253) internal successors, (396), 389 states have internal predecessors, (396), 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) [2022-07-12 18:49:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 396 transitions. [2022-07-12 18:49:07,961 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 396 transitions. Word has length 359 [2022-07-12 18:49:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:07,961 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 396 transitions. [2022-07-12 18:49:07,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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) [2022-07-12 18:49:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 396 transitions. [2022-07-12 18:49:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-07-12 18:49:07,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:07,965 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 61, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-12 18:49:07,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-12 18:49:08,179 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 [2022-07-12 18:49:08,179 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1672251698, now seen corresponding path program 8 times [2022-07-12 18:49:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:08,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865706143] [2022-07-12 18:49:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 5981 proven. 542 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2022-07-12 18:49:08,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865706143] [2022-07-12 18:49:08,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865706143] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562267209] [2022-07-12 18:49:08,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:49:08,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:08,608 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) [2022-07-12 18:49:08,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 18:49:08,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:49:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 18:49:08,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-07-12 18:49:09,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-07-12 18:49:09,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562267209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:09,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:09,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2022-07-12 18:49:09,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398750894] [2022-07-12 18:49:09,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:09,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 18:49:09,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 18:49:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 18:49:09,820 INFO L87 Difference]: Start difference. First operand 390 states and 396 transitions. Second operand has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 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) [2022-07-12 18:49:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:11,823 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2022-07-12 18:49:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-12 18:49:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 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 374 [2022-07-12 18:49:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:11,825 INFO L225 Difference]: With dead ends: 390 [2022-07-12 18:49:11,825 INFO L226 Difference]: Without dead ends: 390 [2022-07-12 18:49:11,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2022-07-12 18:49:11,827 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:11,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 220 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:49:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-12 18:49:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-12 18:49:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 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) [2022-07-12 18:49:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2022-07-12 18:49:11,833 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 374 [2022-07-12 18:49:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:11,833 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2022-07-12 18:49:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 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) [2022-07-12 18:49:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2022-07-12 18:49:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-07-12 18:49:11,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:11,837 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-12 18:49:11,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:12,061 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 [2022-07-12 18:49:12,062 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 9 times [2022-07-12 18:49:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:12,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973642619] [2022-07-12 18:49:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:12,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7290 proven. 2602 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2022-07-12 18:49:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973642619] [2022-07-12 18:49:12,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973642619] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465302811] [2022-07-12 18:49:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:49:12,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:12,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:12,416 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) [2022-07-12 18:49:12,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 18:49:12,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-12 18:49:12,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:12,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 18:49:12,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:12,644 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:49:12,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:49:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2022-07-12 18:49:13,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2022-07-12 18:49:15,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465302811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:15,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:15,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2022-07-12 18:49:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528238856] [2022-07-12 18:49:15,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:15,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-12 18:49:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:15,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-12 18:49:15,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2022-07-12 18:49:15,210 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 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) [2022-07-12 18:49:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:18,568 INFO L93 Difference]: Finished difference Result 522 states and 535 transitions. [2022-07-12 18:49:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-12 18:49:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 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 384 [2022-07-12 18:49:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:18,570 INFO L225 Difference]: With dead ends: 522 [2022-07-12 18:49:18,570 INFO L226 Difference]: Without dead ends: 522 [2022-07-12 18:49:18,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5279 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4623, Invalid=15117, Unknown=0, NotChecked=0, Total=19740 [2022-07-12 18:49:18,572 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 696 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:18,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 200 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 18:49:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-07-12 18:49:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 450. [2022-07-12 18:49:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 449 states have internal predecessors, (463), 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) [2022-07-12 18:49:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 463 transitions. [2022-07-12 18:49:18,578 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 463 transitions. Word has length 384 [2022-07-12 18:49:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:18,578 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 463 transitions. [2022-07-12 18:49:18,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 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) [2022-07-12 18:49:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 463 transitions. [2022-07-12 18:49:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-07-12 18:49:18,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:18,581 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-12 18:49:18,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:18,795 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 [2022-07-12 18:49:18,795 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2070971837, now seen corresponding path program 10 times [2022-07-12 18:49:18,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812352937] [2022-07-12 18:49:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:18,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 417 proven. 13839 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-07-12 18:49:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812352937] [2022-07-12 18:49:19,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812352937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:19,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364614974] [2022-07-12 18:49:19,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:49:19,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:19,199 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) [2022-07-12 18:49:19,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 18:49:19,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:49:19,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 18:49:19,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-07-12 18:49:20,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-07-12 18:49:21,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364614974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:21,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:21,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35, 35] total 70 [2022-07-12 18:49:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867775364] [2022-07-12 18:49:21,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-12 18:49:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-12 18:49:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=3491, Unknown=0, NotChecked=0, Total=4830 [2022-07-12 18:49:21,569 INFO L87 Difference]: Start difference. First operand 450 states and 463 transitions. Second operand has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 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) [2022-07-12 18:49:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:28,014 INFO L93 Difference]: Finished difference Result 1468 states and 1557 transitions. [2022-07-12 18:49:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-07-12 18:49:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 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 449 [2022-07-12 18:49:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:28,018 INFO L225 Difference]: With dead ends: 1468 [2022-07-12 18:49:28,018 INFO L226 Difference]: Without dead ends: 1468 [2022-07-12 18:49:28,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 852 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62622 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=34492, Invalid=81448, Unknown=0, NotChecked=0, Total=115940 [2022-07-12 18:49:28,028 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 660 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:28,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 176 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 18:49:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-07-12 18:49:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1457. [2022-07-12 18:49:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0618131868131868) internal successors, (1546), 1456 states have internal predecessors, (1546), 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) [2022-07-12 18:49:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1546 transitions. [2022-07-12 18:49:28,045 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1546 transitions. Word has length 449 [2022-07-12 18:49:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:28,046 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1546 transitions. [2022-07-12 18:49:28,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 states have internal predecessors, (465), 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) [2022-07-12 18:49:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1546 transitions. [2022-07-12 18:49:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2022-07-12 18:49:28,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:28,056 INFO L195 NwaCegarLoop]: trace histogram [187, 187, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-07-12 18:49:28,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-12 18:49:28,282 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 [2022-07-12 18:49:28,282 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1138886418, now seen corresponding path program 11 times [2022-07-12 18:49:28,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:28,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766735176] [2022-07-12 18:49:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 34458 proven. 833 refuted. 0 times theorem prover too weak. 56382 trivial. 0 not checked. [2022-07-12 18:49:29,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766735176] [2022-07-12 18:49:29,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766735176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:29,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712842626] [2022-07-12 18:49:29,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:49:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:29,217 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) [2022-07-12 18:49:29,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 18:49:29,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-12 18:49:29,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:49:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 48319 proven. 3482 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2022-07-12 18:49:30,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 49198 proven. 2603 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2022-07-12 18:49:31,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712842626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:31,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:31,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2022-07-12 18:49:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595478865] [2022-07-12 18:49:31,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:31,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-12 18:49:31,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-12 18:49:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=3430, Unknown=0, NotChecked=0, Total=4160 [2022-07-12 18:49:31,207 INFO L87 Difference]: Start difference. First operand 1457 states and 1546 transitions. Second operand has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 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) [2022-07-12 18:49:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:33,922 INFO L93 Difference]: Finished difference Result 1457 states and 1534 transitions. [2022-07-12 18:49:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-12 18:49:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 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 1076 [2022-07-12 18:49:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:33,926 INFO L225 Difference]: With dead ends: 1457 [2022-07-12 18:49:33,926 INFO L226 Difference]: Without dead ends: 1457 [2022-07-12 18:49:33,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2114 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4642 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3778, Invalid=15128, Unknown=0, NotChecked=0, Total=18906 [2022-07-12 18:49:33,927 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 230 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:33,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 170 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3623 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 18:49:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-07-12 18:49:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2022-07-12 18:49:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0535714285714286) internal successors, (1534), 1456 states have internal predecessors, (1534), 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) [2022-07-12 18:49:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1534 transitions. [2022-07-12 18:49:33,943 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1534 transitions. Word has length 1076 [2022-07-12 18:49:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:33,944 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1534 transitions. [2022-07-12 18:49:33,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 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) [2022-07-12 18:49:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1534 transitions. [2022-07-12 18:49:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-07-12 18:49:33,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:33,954 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-07-12 18:49:33,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 18:49:34,167 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 [2022-07-12 18:49:34,167 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1593275497, now seen corresponding path program 12 times [2022-07-12 18:49:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:34,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112275312] [2022-07-12 18:49:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 38226 proven. 1001 refuted. 0 times theorem prover too weak. 63204 trivial. 0 not checked. [2022-07-12 18:49:35,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:35,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112275312] [2022-07-12 18:49:35,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112275312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:35,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864065534] [2022-07-12 18:49:35,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:49:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:35,072 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) [2022-07-12 18:49:35,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 18:49:35,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-07-12 18:49:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:49:35,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:49:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:35,573 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:49:35,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:49:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 9527 proven. 20565 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2022-07-12 18:49:38,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 0 proven. 30092 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2022-07-12 18:49:42,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864065534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:42,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:42,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 19] total 64 [2022-07-12 18:49:42,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598128847] [2022-07-12 18:49:42,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 18:49:42,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:42,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 18:49:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=3359, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 18:49:42,566 INFO L87 Difference]: Start difference. First operand 1457 states and 1534 transitions. Second operand has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 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) [2022-07-12 18:49:51,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:49:51,443 INFO L93 Difference]: Finished difference Result 1665 states and 1746 transitions. [2022-07-12 18:49:51,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-07-12 18:49:51,443 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 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 1131 [2022-07-12 18:49:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:49:51,448 INFO L225 Difference]: With dead ends: 1665 [2022-07-12 18:49:51,448 INFO L226 Difference]: Without dead ends: 1665 [2022-07-12 18:49:51,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2451 GetRequests, 2228 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15973 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=8366, Invalid=42034, Unknown=0, NotChecked=0, Total=50400 [2022-07-12 18:49:51,451 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2795 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2795 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:49:51,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2795 Valid, 234 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:49:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-07-12 18:49:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1592. [2022-07-12 18:49:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0521684475172848) internal successors, (1674), 1591 states have internal predecessors, (1674), 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) [2022-07-12 18:49:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1674 transitions. [2022-07-12 18:49:51,467 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1674 transitions. Word has length 1131 [2022-07-12 18:49:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:49:51,468 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1674 transitions. [2022-07-12 18:49:51,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 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) [2022-07-12 18:49:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1674 transitions. [2022-07-12 18:49:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2022-07-12 18:49:51,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:49:51,481 INFO L195 NwaCegarLoop]: trace histogram [232, 232, 231, 231, 231, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-12 18:49:51,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-12 18:49:51,682 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 [2022-07-12 18:49:51,682 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:49:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:49:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash 738738834, now seen corresponding path program 13 times [2022-07-12 18:49:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:49:51,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999057740] [2022-07-12 18:49:51,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:49:51,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:49:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 64944 proven. 1184 refuted. 0 times theorem prover too weak. 73753 trivial. 0 not checked. [2022-07-12 18:49:53,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:49:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999057740] [2022-07-12 18:49:53,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999057740] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:49:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879263971] [2022-07-12 18:49:53,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:49:53,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:49:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:49:53,006 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) [2022-07-12 18:49:53,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 18:49:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:49:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 3982 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 18:49:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:49:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2022-07-12 18:49:54,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:49:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2022-07-12 18:49:55,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879263971] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:49:55,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:49:55,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 66 [2022-07-12 18:49:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485565600] [2022-07-12 18:49:55,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:49:55,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 18:49:55,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:49:55,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 18:49:55,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3586, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 18:49:55,321 INFO L87 Difference]: Start difference. First operand 1592 states and 1674 transitions. Second operand has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 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) [2022-07-12 18:50:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:00,231 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2022-07-12 18:50:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-12 18:50:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 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 1308 [2022-07-12 18:50:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:00,236 INFO L225 Difference]: With dead ends: 1592 [2022-07-12 18:50:00,236 INFO L226 Difference]: Without dead ends: 1592 [2022-07-12 18:50:00,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2581 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6787 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4910, Invalid=23146, Unknown=0, NotChecked=0, Total=28056 [2022-07-12 18:50:00,239 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 213 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 7138 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 7177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 7138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:00,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 252 Invalid, 7177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 7138 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-12 18:50:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-07-12 18:50:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2022-07-12 18:50:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 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) [2022-07-12 18:50:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2022-07-12 18:50:00,260 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1308 [2022-07-12 18:50:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:00,261 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2022-07-12 18:50:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 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) [2022-07-12 18:50:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2022-07-12 18:50:00,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2022-07-12 18:50:00,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:00,280 INFO L195 NwaCegarLoop]: trace histogram [241, 241, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-12 18:50:00,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:00,495 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 [2022-07-12 18:50:00,495 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:50:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:00,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1786428189, now seen corresponding path program 14 times [2022-07-12 18:50:00,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:50:00,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549445445] [2022-07-12 18:50:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:00,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:50:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 69671 proven. 1382 refuted. 0 times theorem prover too weak. 79619 trivial. 0 not checked. [2022-07-12 18:50:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:50:01,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549445445] [2022-07-12 18:50:01,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549445445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:01,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296534067] [2022-07-12 18:50:01,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:50:01,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:50:01,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:50:01,785 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) [2022-07-12 18:50:01,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-12 18:50:02,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:50:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:50:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 4108 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 18:50:02,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2022-07-12 18:50:03,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2022-07-12 18:50:04,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296534067] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:50:04,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:50:04,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 71 [2022-07-12 18:50:04,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314763602] [2022-07-12 18:50:04,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:04,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-12 18:50:04,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:50:04,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-12 18:50:04,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=4163, Unknown=0, NotChecked=0, Total=4970 [2022-07-12 18:50:04,772 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 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) [2022-07-12 18:50:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:10,188 INFO L93 Difference]: Finished difference Result 1674 states and 1735 transitions. [2022-07-12 18:50:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-07-12 18:50:10,188 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 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 1353 [2022-07-12 18:50:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:10,192 INFO L225 Difference]: With dead ends: 1674 [2022-07-12 18:50:10,192 INFO L226 Difference]: Without dead ends: 1674 [2022-07-12 18:50:10,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2854 GetRequests, 2668 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6114, Invalid=29042, Unknown=0, NotChecked=0, Total=35156 [2022-07-12 18:50:10,194 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 214 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6847 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 6886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:10,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 292 Invalid, 6886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6847 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-12 18:50:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-07-12 18:50:10,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1664. [2022-07-12 18:50:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.0372820204449789) internal successors, (1725), 1663 states have internal predecessors, (1725), 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) [2022-07-12 18:50:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 1725 transitions. [2022-07-12 18:50:10,211 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 1725 transitions. Word has length 1353 [2022-07-12 18:50:10,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:10,212 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 1725 transitions. [2022-07-12 18:50:10,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 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) [2022-07-12 18:50:10,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 1725 transitions. [2022-07-12 18:50:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2022-07-12 18:50:10,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:10,226 INFO L195 NwaCegarLoop]: trace histogram [249, 249, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-12 18:50:10,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:10,439 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 [2022-07-12 18:50:10,439 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:50:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:10,440 INFO L85 PathProgramCache]: Analyzing trace with hash -524826813, now seen corresponding path program 15 times [2022-07-12 18:50:10,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:50:10,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008244693] [2022-07-12 18:50:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:10,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:50:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 74167 proven. 1595 refuted. 0 times theorem prover too weak. 84842 trivial. 0 not checked. [2022-07-12 18:50:11,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:50:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008244693] [2022-07-12 18:50:11,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008244693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835784649] [2022-07-12 18:50:11,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:50:11,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:50:11,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:50:11,514 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) [2022-07-12 18:50:11,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-12 18:50:12,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-12 18:50:12,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:50:12,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-12 18:50:12,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:12,359 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:50:12,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:50:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2022-07-12 18:50:17,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2022-07-12 18:50:21,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835784649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:50:21,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:50:21,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 26] total 84 [2022-07-12 18:50:21,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372058970] [2022-07-12 18:50:21,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-12 18:50:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:50:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-12 18:50:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=5660, Unknown=0, NotChecked=0, Total=6972 [2022-07-12 18:50:21,877 INFO L87 Difference]: Start difference. First operand 1664 states and 1725 transitions. Second operand has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 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) [2022-07-12 18:50:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:27,238 INFO L93 Difference]: Finished difference Result 2063 states and 2130 transitions. [2022-07-12 18:50:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-12 18:50:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 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 1393 [2022-07-12 18:50:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:27,243 INFO L225 Difference]: With dead ends: 2063 [2022-07-12 18:50:27,243 INFO L226 Difference]: Without dead ends: 2063 [2022-07-12 18:50:27,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2932 GetRequests, 2737 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10655 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=7662, Invalid=30950, Unknown=0, NotChecked=0, Total=38612 [2022-07-12 18:50:27,245 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2371 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2371 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:27,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2371 Valid, 407 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 18:50:27,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2022-07-12 18:50:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1783. [2022-07-12 18:50:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0336700336700337) internal successors, (1842), 1782 states have internal predecessors, (1842), 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) [2022-07-12 18:50:27,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1842 transitions. [2022-07-12 18:50:27,264 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1842 transitions. Word has length 1393 [2022-07-12 18:50:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:27,264 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1842 transitions. [2022-07-12 18:50:27,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 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) [2022-07-12 18:50:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1842 transitions. [2022-07-12 18:50:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2022-07-12 18:50:27,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:27,280 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 265, 265, 265, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-12 18:50:27,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:27,502 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 [2022-07-12 18:50:27,502 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:50:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash -950517878, now seen corresponding path program 16 times [2022-07-12 18:50:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:50:27,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248984499] [2022-07-12 18:50:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:50:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 89052 proven. 1823 refuted. 0 times theorem prover too weak. 91897 trivial. 0 not checked. [2022-07-12 18:50:28,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:50:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248984499] [2022-07-12 18:50:28,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248984499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492824485] [2022-07-12 18:50:28,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 18:50:28,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:50:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:50:28,670 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) [2022-07-12 18:50:28,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-12 18:50:37,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 18:50:37,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:50:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 4458 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-12 18:50:38,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:50:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2022-07-12 18:50:39,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:50:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2022-07-12 18:50:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492824485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:50:41,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:50:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 91 [2022-07-12 18:50:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821751280] [2022-07-12 18:50:41,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:50:41,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-12 18:50:41,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:50:41,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-12 18:50:41,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=6882, Unknown=0, NotChecked=0, Total=8190 [2022-07-12 18:50:41,543 INFO L87 Difference]: Start difference. First operand 1783 states and 1842 transitions. Second operand has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 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) [2022-07-12 18:50:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:50:55,267 INFO L93 Difference]: Finished difference Result 2385 states and 2423 transitions. [2022-07-12 18:50:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-07-12 18:50:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 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 1478 [2022-07-12 18:50:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:50:55,271 INFO L225 Difference]: With dead ends: 2385 [2022-07-12 18:50:55,271 INFO L226 Difference]: Without dead ends: 2385 [2022-07-12 18:50:55,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3234 GetRequests, 2902 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28799 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=20878, Invalid=90344, Unknown=0, NotChecked=0, Total=111222 [2022-07-12 18:50:55,275 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 276 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13289 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 13353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 13289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:50:55,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 360 Invalid, 13353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 13289 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-12 18:50:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-07-12 18:50:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2375. [2022-07-12 18:50:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 1.0164279696714407) internal successors, (2413), 2374 states have internal predecessors, (2413), 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) [2022-07-12 18:50:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2413 transitions. [2022-07-12 18:50:55,296 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2413 transitions. Word has length 1478 [2022-07-12 18:50:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:50:55,297 INFO L495 AbstractCegarLoop]: Abstraction has 2375 states and 2413 transitions. [2022-07-12 18:50:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 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) [2022-07-12 18:50:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2413 transitions. [2022-07-12 18:50:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1554 [2022-07-12 18:50:55,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:50:55,315 INFO L195 NwaCegarLoop]: trace histogram [281, 281, 280, 280, 280, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-12 18:50:55,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-12 18:50:55,543 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 [2022-07-12 18:50:55,543 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:50:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:50:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2011725613, now seen corresponding path program 17 times [2022-07-12 18:50:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:50:55,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917014970] [2022-07-12 18:50:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:50:55,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:50:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:50:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 111350 proven. 2324 refuted. 0 times theorem prover too weak. 89858 trivial. 0 not checked. [2022-07-12 18:50:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:50:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917014970] [2022-07-12 18:50:56,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917014970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:50:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78969873] [2022-07-12 18:50:56,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 18:50:56,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:50:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:50:56,947 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) [2022-07-12 18:50:56,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-12 18:51:01,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2022-07-12 18:51:01,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:51:01,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 4002 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 18:51:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 151603 proven. 16208 refuted. 0 times theorem prover too weak. 35721 trivial. 0 not checked. [2022-07-12 18:51:03,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 154575 proven. 13236 refuted. 0 times theorem prover too weak. 35721 trivial. 0 not checked. [2022-07-12 18:51:05,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78969873] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:51:05,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:51:05,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2022-07-12 18:51:05,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877140711] [2022-07-12 18:51:05,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:05,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-07-12 18:51:05,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:51:05,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-07-12 18:51:05,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=8281, Unknown=0, NotChecked=0, Total=9900 [2022-07-12 18:51:05,017 INFO L87 Difference]: Start difference. First operand 2375 states and 2413 transitions. Second operand has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 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) [2022-07-12 18:51:15,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:15,398 INFO L93 Difference]: Finished difference Result 2564 states and 2596 transitions. [2022-07-12 18:51:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-07-12 18:51:15,398 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 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 1553 [2022-07-12 18:51:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:15,403 INFO L225 Difference]: With dead ends: 2564 [2022-07-12 18:51:15,403 INFO L226 Difference]: Without dead ends: 2564 [2022-07-12 18:51:15,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3337 GetRequests, 3047 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21645 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15727, Invalid=69245, Unknown=0, NotChecked=0, Total=84972 [2022-07-12 18:51:15,407 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 316 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 11164 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 11241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 11164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:15,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 375 Invalid, 11241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 11164 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-12 18:51:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-07-12 18:51:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2554. [2022-07-12 18:51:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 1.0129259694477086) internal successors, (2586), 2553 states have internal predecessors, (2586), 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) [2022-07-12 18:51:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 2586 transitions. [2022-07-12 18:51:15,426 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 2586 transitions. Word has length 1553 [2022-07-12 18:51:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:15,427 INFO L495 AbstractCegarLoop]: Abstraction has 2554 states and 2586 transitions. [2022-07-12 18:51:15,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 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) [2022-07-12 18:51:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 2586 transitions. [2022-07-12 18:51:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1569 [2022-07-12 18:51:15,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:15,445 INFO L195 NwaCegarLoop]: trace histogram [284, 284, 283, 283, 283, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-12 18:51:15,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:15,671 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 [2022-07-12 18:51:15,671 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:51:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash -595969838, now seen corresponding path program 18 times [2022-07-12 18:51:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:51:15,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145930502] [2022-07-12 18:51:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:51:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 114502 proven. 2597 refuted. 0 times theorem prover too weak. 90720 trivial. 0 not checked. [2022-07-12 18:51:17,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:51:17,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145930502] [2022-07-12 18:51:17,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145930502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:17,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465424832] [2022-07-12 18:51:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 18:51:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:51:17,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:51:17,025 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) [2022-07-12 18:51:17,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-12 18:51:20,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-07-12 18:51:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:51:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 3359 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-12 18:51:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:20,795 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:51:20,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:51:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 28088 proven. 43074 refuted. 0 times theorem prover too weak. 136657 trivial. 0 not checked. [2022-07-12 18:51:26,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 0 proven. 71162 refuted. 0 times theorem prover too weak. 136657 trivial. 0 not checked. [2022-07-12 18:51:34,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465424832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:51:34,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:51:34,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32, 32] total 104 [2022-07-12 18:51:34,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207082149] [2022-07-12 18:51:34,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:34,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-12 18:51:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:51:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-12 18:51:34,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1922, Invalid=8790, Unknown=0, NotChecked=0, Total=10712 [2022-07-12 18:51:34,812 INFO L87 Difference]: Start difference. First operand 2554 states and 2586 transitions. Second operand has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 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) [2022-07-12 18:51:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:51:50,252 INFO L93 Difference]: Finished difference Result 3232 states and 3297 transitions. [2022-07-12 18:51:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2022-07-12 18:51:50,253 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 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 1568 [2022-07-12 18:51:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:51:50,261 INFO L225 Difference]: With dead ends: 3232 [2022-07-12 18:51:50,261 INFO L226 Difference]: Without dead ends: 3232 [2022-07-12 18:51:50,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3419 GetRequests, 3075 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37459 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=19916, Invalid=99454, Unknown=0, NotChecked=0, Total=119370 [2022-07-12 18:51:50,271 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5673 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 1210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5673 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1210 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-12 18:51:50,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5673 Valid, 490 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1210 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-12 18:51:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-07-12 18:51:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2955. [2022-07-12 18:51:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.0159106296547056) internal successors, (3001), 2954 states have internal predecessors, (3001), 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) [2022-07-12 18:51:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3001 transitions. [2022-07-12 18:51:50,298 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3001 transitions. Word has length 1568 [2022-07-12 18:51:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:51:50,299 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 3001 transitions. [2022-07-12 18:51:50,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 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) [2022-07-12 18:51:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3001 transitions. [2022-07-12 18:51:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1883 [2022-07-12 18:51:50,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:51:50,325 INFO L195 NwaCegarLoop]: trace histogram [344, 344, 343, 343, 343, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2022-07-12 18:51:50,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-12 18:51:50,539 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 [2022-07-12 18:51:50,539 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:51:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:51:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1136406914, now seen corresponding path program 19 times [2022-07-12 18:51:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:51:50,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753939297] [2022-07-12 18:51:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:51:50,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:51:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 231234 proven. 20637 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-07-12 18:51:52,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:51:52,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753939297] [2022-07-12 18:51:52,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753939297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:51:52,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448784105] [2022-07-12 18:51:52,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 18:51:52,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:51:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:51:52,132 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) [2022-07-12 18:51:52,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-12 18:51:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:51:53,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 5616 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-12 18:51:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:51:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-07-12 18:51:54,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:51:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-07-12 18:51:56,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448784105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:51:56,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:51:56,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2022-07-12 18:51:56,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922713294] [2022-07-12 18:51:56,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:51:56,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-12 18:51:56,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:51:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-12 18:51:56,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=5280, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 18:51:56,348 INFO L87 Difference]: Start difference. First operand 2955 states and 3001 transitions. Second operand has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 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) [2022-07-12 18:52:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:52:03,634 INFO L93 Difference]: Finished difference Result 2955 states and 3000 transitions. [2022-07-12 18:52:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-07-12 18:52:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 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 1882 [2022-07-12 18:52:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:52:03,640 INFO L225 Difference]: With dead ends: 2955 [2022-07-12 18:52:03,640 INFO L226 Difference]: Without dead ends: 2955 [2022-07-12 18:52:03,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4020 GetRequests, 3723 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27163 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=23982, Invalid=65120, Unknown=0, NotChecked=0, Total=89102 [2022-07-12 18:52:03,649 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 199 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:52:03,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 445 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-12 18:52:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-07-12 18:52:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2955. [2022-07-12 18:52:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.015572105619499) internal successors, (3000), 2954 states have internal predecessors, (3000), 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) [2022-07-12 18:52:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3000 transitions. [2022-07-12 18:52:03,677 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3000 transitions. Word has length 1882 [2022-07-12 18:52:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:52:03,678 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 3000 transitions. [2022-07-12 18:52:03,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 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) [2022-07-12 18:52:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3000 transitions. [2022-07-12 18:52:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1888 [2022-07-12 18:52:03,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:52:03,701 INFO L195 NwaCegarLoop]: trace histogram [345, 345, 344, 344, 344, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2022-07-12 18:52:03,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-12 18:52:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:52:03,902 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-12 18:52:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:52:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash -87602005, now seen corresponding path program 20 times [2022-07-12 18:52:03,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:52:03,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019128591] [2022-07-12 18:52:03,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:52:03,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:52:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:52:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 119020 proven. 158286 refuted. 0 times theorem prover too weak. 28435 trivial. 0 not checked. [2022-07-12 18:52:05,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:52:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019128591] [2022-07-12 18:52:05,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019128591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:52:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872134147] [2022-07-12 18:52:05,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:52:05,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:52:05,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:52:05,555 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:52:05,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-12 18:52:06,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:52:06,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:52:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 5630 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-12 18:52:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:52:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 120715 proven. 155685 refuted. 0 times theorem prover too weak. 29341 trivial. 0 not checked. [2022-07-12 18:52:08,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:52:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 120715 proven. 155685 refuted. 0 times theorem prover too weak. 29341 trivial. 0 not checked. [2022-07-12 18:52:10,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872134147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:52:10,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:52:10,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 94 [2022-07-12 18:52:10,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728659472] [2022-07-12 18:52:10,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:52:10,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-07-12 18:52:10,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:52:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-07-12 18:52:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=7014, Unknown=0, NotChecked=0, Total=8742 [2022-07-12 18:52:10,421 INFO L87 Difference]: Start difference. First operand 2955 states and 3000 transitions. Second operand has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 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)