./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/array-memsafety/subseq-alloca-2.i -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 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:09:12,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:09:12,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:09:12,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:09:12,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:09:12,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:09:12,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:09:12,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:09:12,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:09:12,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:09:12,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:09:12,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:09:12,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:09:12,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:09:12,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:09:12,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:09:12,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:09:12,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:09:12,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:09:12,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:09:12,233 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:09:12,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:09:12,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:09:12,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:09:12,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:09:12,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:09:12,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:09:12,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:09:12,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:09:12,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:09:12,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:09:12,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:09:12,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:09:12,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:09:12,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:09:12,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:09:12,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:09:12,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:09:12,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:09:12,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:09:12,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:09:12,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:09:12,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:09:12,291 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:09:12,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:09:12,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:09:12,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:09:12,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:09:12,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:09:12,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:09:12,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:09:12,293 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:09:12,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:09:12,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:09:12,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:09:12,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:09:12,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:09:12,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:09:12,295 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:09:12,295 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:09:12,295 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:09:12,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:09:12,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:09:12,296 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:09:12,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:09:12,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:09:12,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:09:12,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:09:12,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:09:12,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:09:12,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:09:12,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:09:12,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:09:12,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 [2022-07-14 06:09:12,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:09:12,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:09:12,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:09:12,544 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:09:12,544 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:09:12,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2022-07-14 06:09:12,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fffe7062/efd6053e076a43c4a8a8f57e2c2a9c5b/FLAG9bf47b7da [2022-07-14 06:09:13,087 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:09:13,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2022-07-14 06:09:13,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fffe7062/efd6053e076a43c4a8a8f57e2c2a9c5b/FLAG9bf47b7da [2022-07-14 06:09:13,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fffe7062/efd6053e076a43c4a8a8f57e2c2a9c5b [2022-07-14 06:09:13,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:09:13,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:09:13,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:09:13,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:09:13,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:09:13,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca051a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13, skipping insertion in model container [2022-07-14 06:09:13,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:09:13,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:09:13,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:09:13,489 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:09:13,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:09:13,537 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:09:13,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13 WrapperNode [2022-07-14 06:09:13,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:09:13,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:09:13,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:09:13,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:09:13,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,585 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-07-14 06:09:13,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:09:13,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:09:13,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:09:13,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:09:13,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:09:13,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:09:13,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:09:13,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:09:13,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (1/1) ... [2022-07-14 06:09:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:09:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:13,651 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) [2022-07-14 06:09:13,676 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 [2022-07-14 06:09:13,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:09:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:09:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:09:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:09:13,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:09:13,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:09:13,800 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:09:13,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:09:14,004 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:09:14,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:09:14,009 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 06:09:14,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:09:14 BoogieIcfgContainer [2022-07-14 06:09:14,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:09:14,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:09:14,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:09:14,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:09:14,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:09:13" (1/3) ... [2022-07-14 06:09:14,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236af5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:09:14, skipping insertion in model container [2022-07-14 06:09:14,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:13" (2/3) ... [2022-07-14 06:09:14,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236af5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:09:14, skipping insertion in model container [2022-07-14 06:09:14,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:09:14" (3/3) ... [2022-07-14 06:09:14,017 INFO L111 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2022-07-14 06:09:14,026 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:09:14,026 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-14 06:09:14,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:09:14,066 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@4db01b87, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24c0351a [2022-07-14 06:09:14,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-14 06:09:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.9375) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:09:14,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 06:09:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356140252] [2022-07-14 06:09:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356140252] [2022-07-14 06:09:14,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356140252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467052892] [2022-07-14 06:09:14,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:14,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:14,262 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.9375) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-07-14 06:09:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,289 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-14 06:09:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:14,291 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 [2022-07-14 06:09:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,296 INFO L225 Difference]: With dead ends: 96 [2022-07-14 06:09:14,296 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 06:09:14,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:14,299 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 06:09:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2022-07-14 06:09:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-14 06:09:14,322 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-14 06:09:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,322 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-14 06:09:14,322 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) [2022-07-14 06:09:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-14 06:09:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:09:14,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:09:14,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-14 06:09:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272855362] [2022-07-14 06:09:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272855362] [2022-07-14 06:09:14,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272855362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:09:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197924222] [2022-07-14 06:09:14,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:09:14,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:09:14,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:09:14,364 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-07-14 06:09:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,388 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-07-14 06:09:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:09:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2022-07-14 06:09:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,389 INFO L225 Difference]: With dead ends: 51 [2022-07-14 06:09:14,389 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 06:09:14,389 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 [2022-07-14 06:09:14,390 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 06:09:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-14 06:09:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-14 06:09:14,394 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-14 06:09:14,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,395 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-14 06:09:14,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-07-14 06:09:14,395 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-14 06:09:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:09:14,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:09:14,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-14 06:09:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426733489] [2022-07-14 06:09:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426733489] [2022-07-14 06:09:14,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426733489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433254691] [2022-07-14 06:09:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:14,468 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,548 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-07-14 06:09:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:09:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,549 INFO L225 Difference]: With dead ends: 93 [2022-07-14 06:09:14,549 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 06:09:14,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:09:14,551 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 90 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 06:09:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-07-14 06:09:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-14 06:09:14,555 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2022-07-14 06:09:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,555 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-14 06:09:14,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-14 06:09:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:14,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:09:14,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-14 06:09:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423003679] [2022-07-14 06:09:14,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423003679] [2022-07-14 06:09:14,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423003679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793415772] [2022-07-14 06:09:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:14,614 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,637 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-14 06:09:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-14 06:09:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,638 INFO L225 Difference]: With dead ends: 52 [2022-07-14 06:09:14,638 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 06:09:14,639 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 [2022-07-14 06:09:14,639 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 06:09:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-14 06:09:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-14 06:09:14,643 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2022-07-14 06:09:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,643 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-14 06:09:14,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-14 06:09:14,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:14,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:09:14,644 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,645 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-14 06:09:14,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810098811] [2022-07-14 06:09:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810098811] [2022-07-14 06:09:14,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810098811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030355731] [2022-07-14 06:09:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:14,672 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,690 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-07-14 06:09:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:14,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-14 06:09:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,691 INFO L225 Difference]: With dead ends: 94 [2022-07-14 06:09:14,691 INFO L226 Difference]: Without dead ends: 94 [2022-07-14 06:09:14,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:14,692 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 138 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-14 06:09:14,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-14 06:09:14,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-14 06:09:14,697 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-14 06:09:14,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,697 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-14 06:09:14,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-14 06:09:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:14,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:09:14,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-14 06:09:14,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714506410] [2022-07-14 06:09:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714506410] [2022-07-14 06:09:14,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714506410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:09:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558061298] [2022-07-14 06:09:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:09:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:09:14,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:09:14,720 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,746 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-07-14 06:09:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:09:14,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-14 06:09:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,747 INFO L225 Difference]: With dead ends: 61 [2022-07-14 06:09:14,747 INFO L226 Difference]: Without dead ends: 61 [2022-07-14 06:09:14,747 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 [2022-07-14 06:09:14,748 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 38 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 [2022-07-14 06:09:14,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-14 06:09:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-14 06:09:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-14 06:09:14,751 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-07-14 06:09:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,751 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-14 06:09:14,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-14 06:09:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:14,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:09:14,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,753 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-14 06:09:14,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222690662] [2022-07-14 06:09:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222690662] [2022-07-14 06:09:14,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222690662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:14,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988351795] [2022-07-14 06:09:14,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:14,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:14,798 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,879 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-07-14 06:09:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-14 06:09:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,880 INFO L225 Difference]: With dead ends: 94 [2022-07-14 06:09:14,880 INFO L226 Difference]: Without dead ends: 94 [2022-07-14 06:09:14,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:14,881 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-14 06:09:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-14 06:09:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-14 06:09:14,885 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-07-14 06:09:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,885 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-14 06:09:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-14 06:09:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:09:14,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:09:14,887 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-14 06:09:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417494561] [2022-07-14 06:09:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:14,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:14,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417494561] [2022-07-14 06:09:14,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417494561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:14,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:14,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:14,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335612850] [2022-07-14 06:09:14,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:14,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:14,926 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:14,958 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-07-14 06:09:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:14,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2022-07-14 06:09:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:14,959 INFO L225 Difference]: With dead ends: 62 [2022-07-14 06:09:14,960 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 06:09:14,960 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 [2022-07-14 06:09:14,960 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:14,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 06:09:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-14 06:09:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-14 06:09:14,964 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2022-07-14 06:09:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:14,964 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-14 06:09:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-14 06:09:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:09:14,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:14,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:14,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:09:14,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:14,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-14 06:09:14,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:14,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131079782] [2022-07-14 06:09:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:14,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131079782] [2022-07-14 06:09:15,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131079782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:15,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334690490] [2022-07-14 06:09:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:15,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:15,020 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) [2022-07-14 06:09:15,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:09:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:09:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:15,147 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 [2022-07-14 06:09:15,152 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 [2022-07-14 06:09:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:15,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:15,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334690490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:15,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:15,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-14 06:09:15,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542969321] [2022-07-14 06:09:15,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:15,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:09:15,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:15,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:09:15,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:09:15,315 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2022-07-14 06:09:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:15,483 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-07-14 06:09:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:09:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 11 [2022-07-14 06:09:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:15,485 INFO L225 Difference]: With dead ends: 143 [2022-07-14 06:09:15,485 INFO L226 Difference]: Without dead ends: 143 [2022-07-14 06:09:15,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:09:15,487 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 394 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:15,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 253 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-14 06:09:15,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2022-07-14 06:09:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-14 06:09:15,500 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2022-07-14 06:09:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:15,500 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-14 06:09:15,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2022-07-14 06:09:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-14 06:09:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:09:15,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:15,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:15,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:15,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:15,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-14 06:09:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304590938] [2022-07-14 06:09:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:15,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:15,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:15,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304590938] [2022-07-14 06:09:15,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304590938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:15,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:15,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:09:15,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702094122] [2022-07-14 06:09:15,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:15,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:09:15,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:09:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:15,798 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-07-14 06:09:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:15,854 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-14 06:09:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 12 [2022-07-14 06:09:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:15,855 INFO L225 Difference]: With dead ends: 80 [2022-07-14 06:09:15,855 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 06:09:15,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:09:15,856 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:15,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 66 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 06:09:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-07-14 06:09:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-07-14 06:09:15,864 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 12 [2022-07-14 06:09:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:15,864 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-07-14 06:09:15,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-07-14 06:09:15,865 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-07-14 06:09:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:09:15,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:15,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:09:15,867 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-14 06:09:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:15,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809355071] [2022-07-14 06:09:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:15,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:15,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809355071] [2022-07-14 06:09:15,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809355071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:15,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:15,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:15,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691190412] [2022-07-14 06:09:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:15,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:15,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:15,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:15,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:15,930 INFO L87 Difference]: Start difference. First operand 67 states and 86 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) [2022-07-14 06:09:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:15,954 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-07-14 06:09:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:15,954 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 12 [2022-07-14 06:09:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:15,955 INFO L225 Difference]: With dead ends: 65 [2022-07-14 06:09:15,956 INFO L226 Difference]: Without dead ends: 65 [2022-07-14 06:09:15,956 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 [2022-07-14 06:09:15,956 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:15,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-14 06:09:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-14 06:09:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.490909090909091) internal successors, (82), 64 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) [2022-07-14 06:09:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-07-14 06:09:15,963 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 12 [2022-07-14 06:09:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:15,964 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-07-14 06:09:15,964 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) [2022-07-14 06:09:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-07-14 06:09:15,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:09:15,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:15,966 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:15,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:09:15,966 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:15,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-14 06:09:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913617171] [2022-07-14 06:09:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:16,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913617171] [2022-07-14 06:09:16,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913617171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473789219] [2022-07-14 06:09:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:16,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:16,066 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) [2022-07-14 06:09:16,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:09:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:16,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:09:16,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:16,121 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:16,121 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 [2022-07-14 06:09:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:16,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:16,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473789219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:16,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:16,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-14 06:09:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913116992] [2022-07-14 06:09:16,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:16,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:09:16,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:09:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:16,280 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:16,430 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2022-07-14 06:09:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:09:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2022-07-14 06:09:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:16,431 INFO L225 Difference]: With dead ends: 139 [2022-07-14 06:09:16,431 INFO L226 Difference]: Without dead ends: 139 [2022-07-14 06:09:16,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-14 06:09:16,432 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 261 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:16,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 206 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:16,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-14 06:09:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 62. [2022-07-14 06:09:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.471698113207547) internal successors, (78), 61 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2022-07-14 06:09:16,435 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 13 [2022-07-14 06:09:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:16,435 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2022-07-14 06:09:16,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2022-07-14 06:09:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:09:16,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:16,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:16,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:16,653 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,SelfDestructingSolverStorable11 [2022-07-14 06:09:16,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:16,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173030, now seen corresponding path program 1 times [2022-07-14 06:09:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:16,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289220025] [2022-07-14 06:09:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:16,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:16,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289220025] [2022-07-14 06:09:16,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289220025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:16,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:16,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:16,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125480695] [2022-07-14 06:09:16,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:16,703 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2022-07-14 06:09:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:16,734 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-07-14 06:09:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 15 [2022-07-14 06:09:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:16,735 INFO L225 Difference]: With dead ends: 59 [2022-07-14 06:09:16,735 INFO L226 Difference]: Without dead ends: 59 [2022-07-14 06:09:16,735 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 [2022-07-14 06:09:16,736 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:16,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 46 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:16,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-14 06:09:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-14 06:09:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 58 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-07-14 06:09:16,737 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 15 [2022-07-14 06:09:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:16,738 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-07-14 06:09:16,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2022-07-14 06:09:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-07-14 06:09:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 06:09:16,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:16,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:16,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 06:09:16,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:16,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173031, now seen corresponding path program 1 times [2022-07-14 06:09:16,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:16,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078083720] [2022-07-14 06:09:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:16,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078083720] [2022-07-14 06:09:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078083720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:16,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:16,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:16,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690126608] [2022-07-14 06:09:16,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:16,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:16,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:16,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:16,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:16,846 INFO L87 Difference]: Start difference. First operand 59 states and 73 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) [2022-07-14 06:09:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:16,885 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-07-14 06:09:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:16,886 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 15 [2022-07-14 06:09:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:16,887 INFO L225 Difference]: With dead ends: 75 [2022-07-14 06:09:16,887 INFO L226 Difference]: Without dead ends: 75 [2022-07-14 06:09:16,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:09:16,900 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:16,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-14 06:09:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-07-14 06:09:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 67 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-07-14 06:09:16,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 15 [2022-07-14 06:09:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:16,903 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-07-14 06:09:16,903 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) [2022-07-14 06:09:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-07-14 06:09:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 06:09:16,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:16,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:09:16,905 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:16,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1184642481, now seen corresponding path program 1 times [2022-07-14 06:09:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:16,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898901054] [2022-07-14 06:09:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:16,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898901054] [2022-07-14 06:09:17,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898901054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:17,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951077573] [2022-07-14 06:09:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:17,016 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2022-07-14 06:09:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,046 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-07-14 06:09:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:17,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 19 [2022-07-14 06:09:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,047 INFO L225 Difference]: With dead ends: 67 [2022-07-14 06:09:17,047 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 06:09:17,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:17,049 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 62 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 06:09:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-14 06:09:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 62 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-07-14 06:09:17,051 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 19 [2022-07-14 06:09:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,051 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-07-14 06:09:17,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2022-07-14 06:09:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-07-14 06:09:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:09:17,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:09:17,052 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1972717743, now seen corresponding path program 1 times [2022-07-14 06:09:17,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:17,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920558127] [2022-07-14 06:09:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920558127] [2022-07-14 06:09:17,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920558127] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:17,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:17,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279087466] [2022-07-14 06:09:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:09:17,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:09:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:09:17,074 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,078 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2022-07-14 06:09:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:09:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-07-14 06:09:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,080 INFO L225 Difference]: With dead ends: 66 [2022-07-14 06:09:17,080 INFO L226 Difference]: Without dead ends: 65 [2022-07-14 06:09:17,080 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 [2022-07-14 06:09:17,081 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-14 06:09:17,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-14 06:09:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.305084745762712) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-14 06:09:17,085 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 20 [2022-07-14 06:09:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,085 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-14 06:09:17,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-14 06:09:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:09:17,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:09:17,087 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1849790580, now seen corresponding path program 1 times [2022-07-14 06:09:17,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:17,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149633448] [2022-07-14 06:09:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149633448] [2022-07-14 06:09:17,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149633448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:17,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:09:17,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662946364] [2022-07-14 06:09:17,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:09:17,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:09:17,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:09:17,192 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,275 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-07-14 06:09:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:09:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:09:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,276 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:09:17,276 INFO L226 Difference]: Without dead ends: 59 [2022-07-14 06:09:17,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:09:17,276 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-14 06:09:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-14 06:09:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 58 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) [2022-07-14 06:09:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-07-14 06:09:17,278 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 22 [2022-07-14 06:09:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,279 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-07-14 06:09:17,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-07-14 06:09:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:09:17,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:09:17,280 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1627528266, now seen corresponding path program 1 times [2022-07-14 06:09:17,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:17,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71776376] [2022-07-14 06:09:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71776376] [2022-07-14 06:09:17,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71776376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:17,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:09:17,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464671777] [2022-07-14 06:09:17,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:09:17,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:09:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:09:17,367 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,461 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-14 06:09:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:09:17,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-14 06:09:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,462 INFO L225 Difference]: With dead ends: 80 [2022-07-14 06:09:17,462 INFO L226 Difference]: Without dead ends: 67 [2022-07-14 06:09:17,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:17,462 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 145 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-14 06:09:17,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2022-07-14 06:09:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-07-14 06:09:17,465 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 22 [2022-07-14 06:09:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,466 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-07-14 06:09:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-07-14 06:09:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:09:17,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:09:17,468 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1399878823, now seen corresponding path program 1 times [2022-07-14 06:09:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:17,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680749298] [2022-07-14 06:09:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680749298] [2022-07-14 06:09:17,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680749298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:17,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155397865] [2022-07-14 06:09:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:17,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:17,531 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) [2022-07-14 06:09:17,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:09:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:09:17,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:17,617 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 [2022-07-14 06:09:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:17,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:09:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155397865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:09:17,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2022-07-14 06:09:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097781170] [2022-07-14 06:09:17,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:09:17,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:09:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:17,680 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,777 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-07-14 06:09:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:09:17,778 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-07-14 06:09:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,778 INFO L225 Difference]: With dead ends: 70 [2022-07-14 06:09:17,778 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 06:09:17,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:09:17,779 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 148 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 06:09:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-14 06:09:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-14 06:09:17,781 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 26 [2022-07-14 06:09:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,781 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-14 06:09:17,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-14 06:09:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 06:09:17,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:17,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -405559511, now seen corresponding path program 1 times [2022-07-14 06:09:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735296284] [2022-07-14 06:09:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735296284] [2022-07-14 06:09:18,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735296284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:18,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096900947] [2022-07-14 06:09:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:18,068 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) [2022-07-14 06:09:18,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:09:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:09:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:18,311 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 5 treesize of output 3 [2022-07-14 06:09:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096900947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:18,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:18,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-14 06:09:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239296496] [2022-07-14 06:09:18,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:09:18,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:09:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:09:18,332 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:18,464 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-07-14 06:09:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:09:18,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-14 06:09:18,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:18,465 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:09:18,465 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 06:09:18,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:09:18,466 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 338 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:18,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 141 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 06:09:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-07-14 06:09:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-14 06:09:18,469 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-07-14 06:09:18,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,469 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-14 06:09:18,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-14 06:09:18,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:09:18,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:18,687 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash -280383491, now seen corresponding path program 1 times [2022-07-14 06:09:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480995071] [2022-07-14 06:09:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:18,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480995071] [2022-07-14 06:09:18,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480995071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:18,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:18,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 06:09:18,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009309768] [2022-07-14 06:09:18,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:09:18,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:09:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:18,818 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:19,768 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-07-14 06:09:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:09:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2022-07-14 06:09:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:19,769 INFO L225 Difference]: With dead ends: 99 [2022-07-14 06:09:19,769 INFO L226 Difference]: Without dead ends: 99 [2022-07-14 06:09:19,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:09:19,769 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 179 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:19,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 158 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:09:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-14 06:09:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2022-07-14 06:09:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2022-07-14 06:09:19,771 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 29 [2022-07-14 06:09:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:19,771 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2022-07-14 06:09:19,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2022-07-14 06:09:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:09:19,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:19,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:19,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-14 06:09:19,772 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash -223125189, now seen corresponding path program 1 times [2022-07-14 06:09:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:19,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924939673] [2022-07-14 06:09:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:19,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:19,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924939673] [2022-07-14 06:09:19,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924939673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:19,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:19,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:09:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724242517] [2022-07-14 06:09:19,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:19,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:09:19,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:09:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:09:19,916 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:20,051 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-07-14 06:09:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:09:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2022-07-14 06:09:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:20,053 INFO L225 Difference]: With dead ends: 67 [2022-07-14 06:09:20,053 INFO L226 Difference]: Without dead ends: 58 [2022-07-14 06:09:20,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-14 06:09:20,055 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:20,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 160 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-14 06:09:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-07-14 06:09:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 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) [2022-07-14 06:09:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-14 06:09:20,059 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2022-07-14 06:09:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:20,059 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-14 06:09:20,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-14 06:09:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:09:20,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:20,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:20,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-14 06:09:20,061 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1068910272, now seen corresponding path program 1 times [2022-07-14 06:09:20,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:20,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802193744] [2022-07-14 06:09:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:20,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:20,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802193744] [2022-07-14 06:09:20,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802193744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466407030] [2022-07-14 06:09:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:20,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:20,158 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) [2022-07-14 06:09:20,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:09:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:20,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:09:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:20,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:21,250 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 5 treesize of output 3 [2022-07-14 06:09:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:21,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466407030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:21,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:21,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-14 06:09:21,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812069229] [2022-07-14 06:09:21,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:21,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:09:21,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:21,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:09:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:09:21,320 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 17 states, 16 states have (on average 4.625) internal successors, (74), 17 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) [2022-07-14 06:09:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:21,844 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-07-14 06:09:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:09:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.625) internal successors, (74), 17 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 33 [2022-07-14 06:09:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:21,847 INFO L225 Difference]: With dead ends: 84 [2022-07-14 06:09:21,847 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 06:09:21,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:09:21,851 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 273 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:21,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 134 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:09:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 06:09:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2022-07-14 06:09:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-07-14 06:09:21,856 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2022-07-14 06:09:21,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:21,857 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-07-14 06:09:21,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.625) internal successors, (74), 17 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) [2022-07-14 06:09:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-07-14 06:09:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:09:21,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:21,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:21,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:22,075 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,SelfDestructingSolverStorable22 [2022-07-14 06:09:22,075 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:22,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1533958547, now seen corresponding path program 1 times [2022-07-14 06:09:22,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:22,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407741624] [2022-07-14 06:09:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:22,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:22,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407741624] [2022-07-14 06:09:22,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407741624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103136903] [2022-07-14 06:09:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:22,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:22,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:22,310 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) [2022-07-14 06:09:22,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:09:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:09:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:22,546 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 14 treesize of output 10 [2022-07-14 06:09:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:22,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:23,153 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 15 treesize of output 13 [2022-07-14 06:09:23,155 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 22 [2022-07-14 06:09:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:23,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103136903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:23,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:23,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 15] total 34 [2022-07-14 06:09:23,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469442614] [2022-07-14 06:09:23,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:09:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:23,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:09:23,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:09:23,325 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 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) [2022-07-14 06:09:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:23,862 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2022-07-14 06:09:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 06:09:23,862 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 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 40 [2022-07-14 06:09:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:23,863 INFO L225 Difference]: With dead ends: 152 [2022-07-14 06:09:23,863 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:09:23,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=2770, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:09:23,864 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:23,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 366 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 284 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-07-14 06:09:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:09:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-07-14 06:09:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 94 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) [2022-07-14 06:09:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2022-07-14 06:09:23,866 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 40 [2022-07-14 06:09:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:23,866 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2022-07-14 06:09:23,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 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) [2022-07-14 06:09:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2022-07-14 06:09:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:09:23,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:23,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:23,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:24,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:24,075 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:24,076 INFO L85 PathProgramCache]: Analyzing trace with hash -36257516, now seen corresponding path program 1 times [2022-07-14 06:09:24,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:24,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368274697] [2022-07-14 06:09:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:24,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:24,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368274697] [2022-07-14 06:09:24,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368274697] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866291768] [2022-07-14 06:09:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:24,156 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) [2022-07-14 06:09:24,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:09:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:24,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:09:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:24,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:24,508 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 5 treesize of output 3 [2022-07-14 06:09:24,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:24,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866291768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:24,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:24,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-14 06:09:24,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169160296] [2022-07-14 06:09:24,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:24,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:09:24,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:24,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:09:24,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:09:24,537 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:24,739 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2022-07-14 06:09:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:09:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-14 06:09:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:24,740 INFO L225 Difference]: With dead ends: 133 [2022-07-14 06:09:24,740 INFO L226 Difference]: Without dead ends: 131 [2022-07-14 06:09:24,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:09:24,741 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 385 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:24,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 213 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-14 06:09:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2022-07-14 06:09:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2022-07-14 06:09:24,742 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 47 [2022-07-14 06:09:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:24,743 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2022-07-14 06:09:24,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2022-07-14 06:09:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:09:24,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:24,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:24,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:24,951 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:24,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1788924915, now seen corresponding path program 2 times [2022-07-14 06:09:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:24,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190258172] [2022-07-14 06:09:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:25,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190258172] [2022-07-14 06:09:25,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190258172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:25,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703203061] [2022-07-14 06:09:25,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:25,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:25,046 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) [2022-07-14 06:09:25,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:09:25,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:25,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:25,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:09:25,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:25,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:25,351 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 5 treesize of output 3 [2022-07-14 06:09:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:25,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703203061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:25,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:25,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-14 06:09:25,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817179995] [2022-07-14 06:09:25,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:09:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:09:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:09:25,379 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,614 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2022-07-14 06:09:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:09:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 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 48 [2022-07-14 06:09:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,616 INFO L225 Difference]: With dead ends: 203 [2022-07-14 06:09:25,616 INFO L226 Difference]: Without dead ends: 203 [2022-07-14 06:09:25,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:09:25,617 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 282 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:25,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 416 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-14 06:09:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 130. [2022-07-14 06:09:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 129 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2022-07-14 06:09:25,627 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 48 [2022-07-14 06:09:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,627 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2022-07-14 06:09:25,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2022-07-14 06:09:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:09:25,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,628 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:25,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:25,845 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,SelfDestructingSolverStorable25 [2022-07-14 06:09:25,846 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1676974911, now seen corresponding path program 1 times [2022-07-14 06:09:25,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404387849] [2022-07-14 06:09:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:26,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404387849] [2022-07-14 06:09:26,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404387849] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796414230] [2022-07-14 06:09:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:26,323 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) [2022-07-14 06:09:26,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:09:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:26,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 06:09:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:26,567 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 14 treesize of output 10 [2022-07-14 06:09:27,170 INFO L356 Elim1Store]: treesize reduction 18, result has 70.5 percent of original size [2022-07-14 06:09:27,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-07-14 06:09:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:27,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:27,642 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:27,643 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 106 treesize of output 104 [2022-07-14 06:09:27,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:27,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2022-07-14 06:09:27,673 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 36 treesize of output 30 [2022-07-14 06:09:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:27,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796414230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:27,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:27,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 57 [2022-07-14 06:09:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125315941] [2022-07-14 06:09:27,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:27,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-14 06:09:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-14 06:09:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2022-07-14 06:09:27,944 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 57 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 57 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:30,953 INFO L93 Difference]: Finished difference Result 306 states and 334 transitions. [2022-07-14 06:09:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-14 06:09:30,953 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 57 states have internal predecessors, (131), 0 states have call successors, (0), 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 54 [2022-07-14 06:09:30,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:30,954 INFO L225 Difference]: With dead ends: 306 [2022-07-14 06:09:30,954 INFO L226 Difference]: Without dead ends: 306 [2022-07-14 06:09:30,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1311, Invalid=9819, Unknown=0, NotChecked=0, Total=11130 [2022-07-14 06:09:30,956 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 402 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:30,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 699 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 872 Invalid, 0 Unknown, 556 Unchecked, 0.4s Time] [2022-07-14 06:09:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-14 06:09:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 232. [2022-07-14 06:09:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 229 states have (on average 1.1222707423580787) internal successors, (257), 231 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 257 transitions. [2022-07-14 06:09:30,974 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 257 transitions. Word has length 54 [2022-07-14 06:09:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:30,974 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 257 transitions. [2022-07-14 06:09:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 57 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 257 transitions. [2022-07-14 06:09:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:09:30,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:30,977 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:30,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:31,196 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,SelfDestructingSolverStorable26 [2022-07-14 06:09:31,198 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -242750107, now seen corresponding path program 2 times [2022-07-14 06:09:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476085075] [2022-07-14 06:09:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:31,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476085075] [2022-07-14 06:09:31,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476085075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:31,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840752978] [2022-07-14 06:09:31,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:31,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:31,574 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) [2022-07-14 06:09:31,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:09:31,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:31,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:09:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:31,741 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 14 treesize of output 10 [2022-07-14 06:09:31,870 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 15 treesize of output 7 [2022-07-14 06:09:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:31,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:31,936 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 15 treesize of output 13 [2022-07-14 06:09:31,938 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 22 [2022-07-14 06:09:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:32,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840752978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:32,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:32,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 29 [2022-07-14 06:09:32,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965683611] [2022-07-14 06:09:32,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:32,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:09:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:09:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:09:32,030 INFO L87 Difference]: Start difference. First operand 232 states and 257 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:32,972 INFO L93 Difference]: Finished difference Result 290 states and 309 transitions. [2022-07-14 06:09:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:09:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 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 57 [2022-07-14 06:09:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:32,973 INFO L225 Difference]: With dead ends: 290 [2022-07-14 06:09:32,973 INFO L226 Difference]: Without dead ends: 194 [2022-07-14 06:09:32,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=2077, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 06:09:32,974 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 381 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:32,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 592 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 649 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-14 06:09:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-14 06:09:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 138. [2022-07-14 06:09:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.125925925925926) internal successors, (152), 137 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2022-07-14 06:09:32,990 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 57 [2022-07-14 06:09:32,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:32,990 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2022-07-14 06:09:32,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2022-07-14 06:09:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 06:09:32,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:32,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:33,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-14 06:09:33,208 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,SelfDestructingSolverStorable27 [2022-07-14 06:09:33,208 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:33,209 INFO L85 PathProgramCache]: Analyzing trace with hash -759073956, now seen corresponding path program 2 times [2022-07-14 06:09:33,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:33,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216813408] [2022-07-14 06:09:33,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:33,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:33,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:33,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216813408] [2022-07-14 06:09:33,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216813408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:33,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858628712] [2022-07-14 06:09:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:33,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:33,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:33,414 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) [2022-07-14 06:09:33,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:09:33,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-14 06:09:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:33,729 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 14 treesize of output 10 [2022-07-14 06:09:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:33,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-14 06:09:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:34,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:34,419 INFO L356 Elim1Store]: treesize reduction 29, result has 58.6 percent of original size [2022-07-14 06:09:34,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 61 [2022-07-14 06:09:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:34,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:34,866 INFO L356 Elim1Store]: treesize reduction 52, result has 43.5 percent of original size [2022-07-14 06:09:34,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 320 [2022-07-14 06:09:34,876 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:34,877 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 166 treesize of output 160 [2022-07-14 06:09:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:34,910 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-07-14 06:09:34,936 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 32 treesize of output 28 [2022-07-14 06:09:36,899 INFO L356 Elim1Store]: treesize reduction 23, result has 67.1 percent of original size [2022-07-14 06:09:36,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 410 treesize of output 373 [2022-07-14 06:09:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:37,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858628712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:37,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:37,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 25] total 59 [2022-07-14 06:09:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918034684] [2022-07-14 06:09:37,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:37,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:09:37,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:09:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=3100, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:09:37,594 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:37,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:37,997 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2022-07-14 06:09:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-14 06:09:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 0 states have call successors, (0), 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 58 [2022-07-14 06:09:37,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:37,998 INFO L225 Difference]: With dead ends: 177 [2022-07-14 06:09:37,998 INFO L226 Difference]: Without dead ends: 173 [2022-07-14 06:09:37,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:09:37,999 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:38,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 569 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 273 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2022-07-14 06:09:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-14 06:09:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2022-07-14 06:09:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 166 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 184 transitions. [2022-07-14 06:09:38,002 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 184 transitions. Word has length 58 [2022-07-14 06:09:38,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:38,002 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 184 transitions. [2022-07-14 06:09:38,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.593220338983051) internal successors, (153), 59 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:38,002 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 184 transitions. [2022-07-14 06:09:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 06:09:38,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:38,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:38,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-14 06:09:38,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-14 06:09:38,211 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1533214746, now seen corresponding path program 1 times [2022-07-14 06:09:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715277201] [2022-07-14 06:09:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:38,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715277201] [2022-07-14 06:09:38,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715277201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278213603] [2022-07-14 06:09:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:38,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:38,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:38,348 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) [2022-07-14 06:09:38,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:09:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:09:38,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:38,462 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:38,464 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 [2022-07-14 06:09:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:38,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:38,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278213603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:38,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:38,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2022-07-14 06:09:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282007763] [2022-07-14 06:09:38,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 06:09:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 06:09:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:09:38,960 INFO L87 Difference]: Start difference. First operand 167 states and 184 transitions. Second operand has 30 states, 29 states have (on average 5.862068965517241) internal successors, (170), 30 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:39,237 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2022-07-14 06:09:39,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:09:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 5.862068965517241) internal successors, (170), 30 states have internal predecessors, (170), 0 states have call successors, (0), 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 61 [2022-07-14 06:09:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:39,238 INFO L225 Difference]: With dead ends: 242 [2022-07-14 06:09:39,238 INFO L226 Difference]: Without dead ends: 236 [2022-07-14 06:09:39,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:09:39,239 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 568 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:39,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 368 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-14 06:09:39,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2022-07-14 06:09:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 206 states have (on average 1.116504854368932) internal successors, (230), 208 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2022-07-14 06:09:39,242 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 61 [2022-07-14 06:09:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:39,242 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2022-07-14 06:09:39,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 5.862068965517241) internal successors, (170), 30 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:39,242 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2022-07-14 06:09:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:09:39,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:39,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:39,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:39,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:39,462 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1254400585, now seen corresponding path program 3 times [2022-07-14 06:09:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:39,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948724993] [2022-07-14 06:09:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:39,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948724993] [2022-07-14 06:09:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948724993] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019066647] [2022-07-14 06:09:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:39,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:39,914 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) [2022-07-14 06:09:39,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:09:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:09:40,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-14 06:09:40,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:40,043 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 [2022-07-14 06:09:40,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:09:40,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:09:40,541 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:09:40,542 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 30 treesize of output 23 [2022-07-14 06:09:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:40,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:40,742 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_517 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_517) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:09:40,765 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:40,765 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:09:40,769 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:40,769 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 37 treesize of output 37 [2022-07-14 06:09:40,771 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 11 treesize of output 7 [2022-07-14 06:09:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:40,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019066647] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:40,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:40,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 17] total 45 [2022-07-14 06:09:40,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771568958] [2022-07-14 06:09:40,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:40,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:09:40,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:40,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:09:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1730, Unknown=1, NotChecked=84, Total=1980 [2022-07-14 06:09:40,977 INFO L87 Difference]: Start difference. First operand 209 states and 230 transitions. Second operand has 45 states, 45 states have (on average 3.2666666666666666) internal successors, (147), 45 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:41,785 INFO L93 Difference]: Finished difference Result 342 states and 367 transitions. [2022-07-14 06:09:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:09:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2666666666666666) internal successors, (147), 45 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-07-14 06:09:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:41,786 INFO L225 Difference]: With dead ends: 342 [2022-07-14 06:09:41,786 INFO L226 Difference]: Without dead ends: 334 [2022-07-14 06:09:41,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=316, Invalid=3109, Unknown=1, NotChecked=114, Total=3540 [2022-07-14 06:09:41,787 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 159 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:41,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 881 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 940 Invalid, 0 Unknown, 193 Unchecked, 0.4s Time] [2022-07-14 06:09:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-07-14 06:09:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 274. [2022-07-14 06:09:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 271 states have (on average 1.118081180811808) internal successors, (303), 273 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 303 transitions. [2022-07-14 06:09:41,791 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 303 transitions. Word has length 62 [2022-07-14 06:09:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:41,792 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 303 transitions. [2022-07-14 06:09:41,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2666666666666666) internal successors, (147), 45 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 303 transitions. [2022-07-14 06:09:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:09:41,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:41,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:41,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:42,000 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,SelfDestructingSolverStorable30 [2022-07-14 06:09:42,000 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 206881812, now seen corresponding path program 4 times [2022-07-14 06:09:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005423774] [2022-07-14 06:09:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:42,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:42,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005423774] [2022-07-14 06:09:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005423774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259682515] [2022-07-14 06:09:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:09:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:42,165 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) [2022-07-14 06:09:42,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:09:42,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:09:42,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 06:09:42,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:42,303 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:42,304 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 [2022-07-14 06:09:42,310 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 [2022-07-14 06:09:42,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-07-14 06:09:42,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:09:42,945 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:09:42,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2022-07-14 06:09:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:43,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:43,539 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_47| Int) (|ULTIMATE.start_subseq_~pt~0#1.base| Int) (|ULTIMATE.start_subseq_~pt~0#1.offset| Int) (v_ArrVal_566 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_566))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_subseq_~pt~0#1.base|) |ULTIMATE.start_subseq_~pt~0#1.offset|))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_47|) (not (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_47|)) (<= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_47| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= .cse0 0) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |v_ULTIMATE.start_subseq_~ps~0#1.offset_47|)))))))) is different from false [2022-07-14 06:09:43,547 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:43,548 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:09:43,563 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:43,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-14 06:09:43,572 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:43,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:09:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:44,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259682515] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:44,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:44,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 42 [2022-07-14 06:09:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625281591] [2022-07-14 06:09:44,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:09:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:09:44,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1531, Unknown=1, NotChecked=80, Total=1806 [2022-07-14 06:09:44,647 INFO L87 Difference]: Start difference. First operand 274 states and 303 transitions. Second operand has 43 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 43 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:46,395 INFO L93 Difference]: Finished difference Result 366 states and 391 transitions. [2022-07-14 06:09:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:09:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 43 states have internal predecessors, (166), 0 states have call successors, (0), 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 66 [2022-07-14 06:09:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:46,397 INFO L225 Difference]: With dead ends: 366 [2022-07-14 06:09:46,397 INFO L226 Difference]: Without dead ends: 366 [2022-07-14 06:09:46,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1046, Invalid=4359, Unknown=1, NotChecked=144, Total=5550 [2022-07-14 06:09:46,398 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 551 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:46,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1062 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1239 Invalid, 0 Unknown, 348 Unchecked, 0.4s Time] [2022-07-14 06:09:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-07-14 06:09:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 297. [2022-07-14 06:09:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 294 states have (on average 1.1258503401360545) internal successors, (331), 296 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 331 transitions. [2022-07-14 06:09:46,402 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 331 transitions. Word has length 66 [2022-07-14 06:09:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:46,402 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 331 transitions. [2022-07-14 06:09:46,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.9523809523809526) internal successors, (166), 43 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 331 transitions. [2022-07-14 06:09:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-14 06:09:46,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:46,403 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:46,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-14 06:09:46,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:46,604 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:46,604 INFO L85 PathProgramCache]: Analyzing trace with hash -541897289, now seen corresponding path program 2 times [2022-07-14 06:09:46,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:46,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730195724] [2022-07-14 06:09:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:46,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:46,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730195724] [2022-07-14 06:09:46,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730195724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:46,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822911684] [2022-07-14 06:09:46,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:46,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:46,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:46,760 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) [2022-07-14 06:09:46,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:09:46,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:46,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:46,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:09:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:46,923 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 14 treesize of output 10 [2022-07-14 06:09:47,055 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 15 treesize of output 7 [2022-07-14 06:09:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:47,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:47,114 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 15 treesize of output 13 [2022-07-14 06:09:47,115 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 22 [2022-07-14 06:09:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:47,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822911684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:47,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:47,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 28 [2022-07-14 06:09:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190533519] [2022-07-14 06:09:47,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:47,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:09:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:09:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:09:47,175 INFO L87 Difference]: Start difference. First operand 297 states and 331 transitions. Second operand has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:47,467 INFO L93 Difference]: Finished difference Result 486 states and 526 transitions. [2022-07-14 06:09:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:09:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 0 states have call successors, (0), 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 71 [2022-07-14 06:09:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:47,469 INFO L225 Difference]: With dead ends: 486 [2022-07-14 06:09:47,469 INFO L226 Difference]: Without dead ends: 318 [2022-07-14 06:09:47,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:09:47,471 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 270 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:47,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 554 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 501 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-07-14 06:09:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-14 06:09:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 309. [2022-07-14 06:09:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 306 states have (on average 1.1209150326797386) internal successors, (343), 308 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 343 transitions. [2022-07-14 06:09:47,475 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 343 transitions. Word has length 71 [2022-07-14 06:09:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:47,476 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 343 transitions. [2022-07-14 06:09:47,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 343 transitions. [2022-07-14 06:09:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-14 06:09:47,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:47,477 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:47,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:47,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:47,688 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:47,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1112009926, now seen corresponding path program 3 times [2022-07-14 06:09:47,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:47,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504522912] [2022-07-14 06:09:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:47,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:47,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504522912] [2022-07-14 06:09:47,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504522912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:47,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102232785] [2022-07-14 06:09:47,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:47,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:47,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:47,812 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) [2022-07-14 06:09:47,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:09:47,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 06:09:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:09:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:48,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:48,389 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 7 treesize of output 5 [2022-07-14 06:09:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:48,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102232785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:48,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:48,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-07-14 06:09:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351159519] [2022-07-14 06:09:48,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:48,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:09:48,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:09:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:09:48,420 INFO L87 Difference]: Start difference. First operand 309 states and 343 transitions. Second operand has 32 states, 31 states have (on average 6.193548387096774) internal successors, (192), 32 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:48,731 INFO L93 Difference]: Finished difference Result 424 states and 477 transitions. [2022-07-14 06:09:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:09:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.193548387096774) internal successors, (192), 32 states have internal predecessors, (192), 0 states have call successors, (0), 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 [2022-07-14 06:09:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:48,733 INFO L225 Difference]: With dead ends: 424 [2022-07-14 06:09:48,733 INFO L226 Difference]: Without dead ends: 418 [2022-07-14 06:09:48,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:09:48,734 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 693 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:48,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 441 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-14 06:09:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 374. [2022-07-14 06:09:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 371 states have (on average 1.1132075471698113) internal successors, (413), 373 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 413 transitions. [2022-07-14 06:09:48,755 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 413 transitions. Word has length 75 [2022-07-14 06:09:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:48,755 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 413 transitions. [2022-07-14 06:09:48,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.193548387096774) internal successors, (192), 32 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 413 transitions. [2022-07-14 06:09:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-14 06:09:48,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:48,756 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:48,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-14 06:09:48,956 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,SelfDestructingSolverStorable33 [2022-07-14 06:09:48,957 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1734166539, now seen corresponding path program 4 times [2022-07-14 06:09:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:48,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467558546] [2022-07-14 06:09:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467558546] [2022-07-14 06:09:49,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467558546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489516903] [2022-07-14 06:09:49,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:09:49,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:49,198 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) [2022-07-14 06:09:49,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:09:49,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:09:49,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 06:09:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:49,306 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:49,306 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 [2022-07-14 06:09:49,491 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 13 treesize of output 9 [2022-07-14 06:09:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:49,890 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:09:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 112 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:49,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:50,283 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 13 treesize of output 11 [2022-07-14 06:09:50,286 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 20 treesize of output 18 [2022-07-14 06:09:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:50,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489516903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:50,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:50,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-07-14 06:09:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289244179] [2022-07-14 06:09:50,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:50,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:09:50,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:09:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:09:50,702 INFO L87 Difference]: Start difference. First operand 374 states and 413 transitions. Second operand has 46 states, 46 states have (on average 4.934782608695652) internal successors, (227), 46 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:51,265 INFO L93 Difference]: Finished difference Result 630 states and 679 transitions. [2022-07-14 06:09:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:09:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.934782608695652) internal successors, (227), 46 states have internal predecessors, (227), 0 states have call successors, (0), 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 [2022-07-14 06:09:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:51,266 INFO L225 Difference]: With dead ends: 630 [2022-07-14 06:09:51,267 INFO L226 Difference]: Without dead ends: 395 [2022-07-14 06:09:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=449, Invalid=3457, Unknown=0, NotChecked=0, Total=3906 [2022-07-14 06:09:51,269 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 976 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2022-07-14 06:09:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-07-14 06:09:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 386. [2022-07-14 06:09:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 383 states have (on average 1.1096605744125327) internal successors, (425), 385 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 425 transitions. [2022-07-14 06:09:51,286 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 425 transitions. Word has length 85 [2022-07-14 06:09:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:51,286 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 425 transitions. [2022-07-14 06:09:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.934782608695652) internal successors, (227), 46 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 425 transitions. [2022-07-14 06:09:51,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-14 06:09:51,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:51,288 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:51,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-14 06:09:51,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:51,512 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1114418254, now seen corresponding path program 5 times [2022-07-14 06:09:51,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:51,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025155892] [2022-07-14 06:09:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:51,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:51,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:51,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025155892] [2022-07-14 06:09:51,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025155892] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:51,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039940534] [2022-07-14 06:09:51,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:09:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:51,681 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) [2022-07-14 06:09:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:09:51,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:09:51,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-14 06:09:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:51,857 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:51,857 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 [2022-07-14 06:09:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:52,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:52,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039940534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:52,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:52,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-07-14 06:09:52,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197473625] [2022-07-14 06:09:52,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 06:09:52,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:52,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 06:09:52,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:09:52,612 INFO L87 Difference]: Start difference. First operand 386 states and 425 transitions. Second operand has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:52,934 INFO L93 Difference]: Finished difference Result 509 states and 568 transitions. [2022-07-14 06:09:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:09:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-14 06:09:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:52,936 INFO L225 Difference]: With dead ends: 509 [2022-07-14 06:09:52,936 INFO L226 Difference]: Without dead ends: 503 [2022-07-14 06:09:52,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:09:52,937 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 891 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:52,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 574 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-14 06:09:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 458. [2022-07-14 06:09:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 455 states have (on average 1.1076923076923078) internal successors, (504), 457 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 504 transitions. [2022-07-14 06:09:52,945 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 504 transitions. Word has length 89 [2022-07-14 06:09:52,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:52,945 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 504 transitions. [2022-07-14 06:09:52,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 504 transitions. [2022-07-14 06:09:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-14 06:09:52,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:52,947 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:52,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:53,164 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1137156136, now seen corresponding path program 5 times [2022-07-14 06:09:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:53,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071598865] [2022-07-14 06:09:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 77 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:09:53,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071598865] [2022-07-14 06:09:53,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071598865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:53,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221220355] [2022-07-14 06:09:53,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:09:53,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:53,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:53,311 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) [2022-07-14 06:09:53,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:09:53,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:09:53,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:09:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:53,459 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 [2022-07-14 06:09:53,462 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 [2022-07-14 06:09:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:09:53,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 105 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:09:53,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221220355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:53,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:53,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-07-14 06:09:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660027117] [2022-07-14 06:09:53,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:09:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:09:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:09:53,955 INFO L87 Difference]: Start difference. First operand 458 states and 504 transitions. Second operand has 28 states, 28 states have (on average 6.214285714285714) internal successors, (174), 28 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:54,370 INFO L93 Difference]: Finished difference Result 818 states and 879 transitions. [2022-07-14 06:09:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:09:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.214285714285714) internal successors, (174), 28 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-14 06:09:54,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:54,372 INFO L225 Difference]: With dead ends: 818 [2022-07-14 06:09:54,372 INFO L226 Difference]: Without dead ends: 812 [2022-07-14 06:09:54,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:09:54,373 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 698 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:54,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 458 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-07-14 06:09:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 713. [2022-07-14 06:09:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 710 states have (on average 1.1098591549295775) internal successors, (788), 712 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 788 transitions. [2022-07-14 06:09:54,397 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 788 transitions. Word has length 94 [2022-07-14 06:09:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:54,397 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 788 transitions. [2022-07-14 06:09:54,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.214285714285714) internal successors, (174), 28 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 788 transitions. [2022-07-14 06:09:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-14 06:09:54,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:54,399 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:54,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-14 06:09:54,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:54,615 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:54,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:54,615 INFO L85 PathProgramCache]: Analyzing trace with hash 550350122, now seen corresponding path program 3 times [2022-07-14 06:09:54,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:54,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618427080] [2022-07-14 06:09:54,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:54,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 58 proven. 98 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:09:54,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618427080] [2022-07-14 06:09:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618427080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844268619] [2022-07-14 06:09:54,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:54,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:54,987 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) [2022-07-14 06:09:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:09:55,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:09:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-14 06:09:55,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:55,138 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 [2022-07-14 06:09:55,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:09:55,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:09:55,637 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:09:55,637 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 30 treesize of output 23 [2022-07-14 06:09:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-14 06:09:55,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:55,806 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_834 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_834) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:09:55,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:55,809 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:09:55,812 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:55,812 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 37 treesize of output 37 [2022-07-14 06:09:55,814 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 11 treesize of output 7 [2022-07-14 06:09:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 9 proven. 106 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-14 06:09:55,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844268619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:55,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:55,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 43 [2022-07-14 06:09:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962834010] [2022-07-14 06:09:55,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:09:55,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:09:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1582, Unknown=1, NotChecked=80, Total=1806 [2022-07-14 06:09:55,981 INFO L87 Difference]: Start difference. First operand 713 states and 788 transitions. Second operand has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:57,015 INFO L93 Difference]: Finished difference Result 752 states and 810 transitions. [2022-07-14 06:09:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:09:57,016 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 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 94 [2022-07-14 06:09:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:57,018 INFO L225 Difference]: With dead ends: 752 [2022-07-14 06:09:57,018 INFO L226 Difference]: Without dead ends: 740 [2022-07-14 06:09:57,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 161 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=391, Invalid=3394, Unknown=1, NotChecked=120, Total=3906 [2022-07-14 06:09:57,019 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 356 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:57,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1659 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1762 Invalid, 0 Unknown, 279 Unchecked, 0.6s Time] [2022-07-14 06:09:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-07-14 06:09:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 551. [2022-07-14 06:09:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 548 states have (on average 1.1076642335766422) internal successors, (607), 550 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 607 transitions. [2022-07-14 06:09:57,026 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 607 transitions. Word has length 94 [2022-07-14 06:09:57,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:57,026 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 607 transitions. [2022-07-14 06:09:57,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6744186046511627) internal successors, (158), 43 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 607 transitions. [2022-07-14 06:09:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-14 06:09:57,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:57,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:57,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:57,238 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,SelfDestructingSolverStorable37 [2022-07-14 06:09:57,239 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1557638523, now seen corresponding path program 6 times [2022-07-14 06:09:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:57,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432567307] [2022-07-14 06:09:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 33 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:57,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432567307] [2022-07-14 06:09:57,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432567307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:57,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029194154] [2022-07-14 06:09:57,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:09:57,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:57,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:57,680 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) [2022-07-14 06:09:57,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:09:57,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:09:57,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:09:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:57,857 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 [2022-07-14 06:09:57,860 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 [2022-07-14 06:09:58,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:09:58,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:09:58,611 INFO L356 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2022-07-14 06:09:58,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2022-07-14 06:09:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-14 06:09:58,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:59,650 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:59,650 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:09:59,665 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:59,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-14 06:09:59,674 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:59,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:10:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-14 06:10:00,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029194154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:00,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:00,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 42 [2022-07-14 06:10:00,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270622187] [2022-07-14 06:10:00,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:10:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:10:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1583, Unknown=21, NotChecked=0, Total=1722 [2022-07-14 06:10:00,106 INFO L87 Difference]: Start difference. First operand 551 states and 607 transitions. Second operand has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 42 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:01,645 INFO L93 Difference]: Finished difference Result 685 states and 751 transitions. [2022-07-14 06:10:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-14 06:10:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 42 states have internal predecessors, (164), 0 states have call successors, (0), 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 98 [2022-07-14 06:10:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:01,647 INFO L225 Difference]: With dead ends: 685 [2022-07-14 06:10:01,647 INFO L226 Difference]: Without dead ends: 681 [2022-07-14 06:10:01,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=555, Invalid=7980, Unknown=21, NotChecked=0, Total=8556 [2022-07-14 06:10:01,648 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 1215 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:01,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1267 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 846 Invalid, 0 Unknown, 403 Unchecked, 0.2s Time] [2022-07-14 06:10:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-07-14 06:10:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 644. [2022-07-14 06:10:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 641 states have (on average 1.1060842433697349) internal successors, (709), 643 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 709 transitions. [2022-07-14 06:10:01,655 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 709 transitions. Word has length 98 [2022-07-14 06:10:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:01,655 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 709 transitions. [2022-07-14 06:10:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 42 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 709 transitions. [2022-07-14 06:10:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-14 06:10:01,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:01,656 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:01,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:01,887 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,SelfDestructingSolverStorable38 [2022-07-14 06:10:01,888 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2144444537, now seen corresponding path program 4 times [2022-07-14 06:10:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:01,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250389912] [2022-07-14 06:10:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:01,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-14 06:10:02,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250389912] [2022-07-14 06:10:02,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250389912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29840219] [2022-07-14 06:10:02,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:10:02,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:02,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:02,051 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) [2022-07-14 06:10:02,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:10:02,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:10:02,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:10:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:02,184 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 [2022-07-14 06:10:02,187 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 [2022-07-14 06:10:02,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-07-14 06:10:02,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:10:02,758 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:02,758 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 19 treesize of output 19 [2022-07-14 06:10:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 20 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-14 06:10:02,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:03,391 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_954 (Array Int Int)) (|v_ULTIMATE.start_subseq_~ps~0#1.offset_85| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_85|) (not (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_85|)) (<= (+ 5 |v_ULTIMATE.start_subseq_~ps~0#1.offset_85|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_954) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |v_ULTIMATE.start_subseq_~ps~0#1.offset_85|)) 0))) is different from false [2022-07-14 06:10:03,397 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:03,397 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:03,410 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:03,410 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 37 treesize of output 37 [2022-07-14 06:10:03,412 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 11 treesize of output 7 [2022-07-14 06:10:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 32 proven. 95 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-14 06:10:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29840219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:04,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 44 [2022-07-14 06:10:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621178398] [2022-07-14 06:10:04,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:10:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:10:04,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1681, Unknown=1, NotChecked=84, Total=1980 [2022-07-14 06:10:04,107 INFO L87 Difference]: Start difference. First operand 644 states and 709 transitions. Second operand has 45 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 45 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:05,893 INFO L93 Difference]: Finished difference Result 919 states and 983 transitions. [2022-07-14 06:10:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:10:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 45 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-07-14 06:10:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:05,899 INFO L225 Difference]: With dead ends: 919 [2022-07-14 06:10:05,900 INFO L226 Difference]: Without dead ends: 919 [2022-07-14 06:10:05,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1037, Invalid=4222, Unknown=1, NotChecked=142, Total=5402 [2022-07-14 06:10:05,904 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1196 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:05,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 1637 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1879 Invalid, 0 Unknown, 245 Unchecked, 0.7s Time] [2022-07-14 06:10:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-07-14 06:10:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 642. [2022-07-14 06:10:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 639 states have (on average 1.107981220657277) internal successors, (708), 641 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 708 transitions. [2022-07-14 06:10:05,922 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 708 transitions. Word has length 98 [2022-07-14 06:10:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:05,922 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 708 transitions. [2022-07-14 06:10:05,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.9772727272727275) internal successors, (219), 45 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 708 transitions. [2022-07-14 06:10:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-14 06:10:05,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:05,923 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:05,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-14 06:10:06,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-14 06:10:06,143 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:06,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:06,144 INFO L85 PathProgramCache]: Analyzing trace with hash -339437537, now seen corresponding path program 6 times [2022-07-14 06:10:06,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:06,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252790112] [2022-07-14 06:10:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:06,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:06,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252790112] [2022-07-14 06:10:06,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252790112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721700461] [2022-07-14 06:10:06,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:06,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:06,311 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) [2022-07-14 06:10:06,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:10:06,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-14 06:10:06,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:10:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:06,563 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 14 treesize of output 10 [2022-07-14 06:10:06,705 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 15 treesize of output 7 [2022-07-14 06:10:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:06,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:06,794 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 15 treesize of output 13 [2022-07-14 06:10:06,795 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 22 [2022-07-14 06:10:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:06,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721700461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:06,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:06,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 34 [2022-07-14 06:10:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754904339] [2022-07-14 06:10:06,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:06,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:10:06,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:06,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:10:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:10:06,916 INFO L87 Difference]: Start difference. First operand 642 states and 708 transitions. Second operand has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:07,525 INFO L93 Difference]: Finished difference Result 1090 states and 1180 transitions. [2022-07-14 06:10:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:10:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-14 06:10:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:07,527 INFO L225 Difference]: With dead ends: 1090 [2022-07-14 06:10:07,527 INFO L226 Difference]: Without dead ends: 677 [2022-07-14 06:10:07,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 181 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:10:07,527 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 358 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:07,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 949 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 946 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-14 06:10:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-07-14 06:10:07,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 662. [2022-07-14 06:10:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 659 states have (on average 1.1047040971168438) internal successors, (728), 661 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 728 transitions. [2022-07-14 06:10:07,533 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 728 transitions. Word has length 99 [2022-07-14 06:10:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:07,533 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 728 transitions. [2022-07-14 06:10:07,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.617647058823529) internal successors, (157), 34 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 728 transitions. [2022-07-14 06:10:07,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-14 06:10:07,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:07,534 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:07,734 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash -92157150, now seen corresponding path program 7 times [2022-07-14 06:10:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:07,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423937364] [2022-07-14 06:10:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:07,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423937364] [2022-07-14 06:10:07,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423937364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664252132] [2022-07-14 06:10:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:07,900 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) [2022-07-14 06:10:07,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:10:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:08,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:10:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:08,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:08,463 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 5 treesize of output 3 [2022-07-14 06:10:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:08,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664252132] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:08,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:08,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-07-14 06:10:08,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117449537] [2022-07-14 06:10:08,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:10:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:08,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:10:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:10:08,488 INFO L87 Difference]: Start difference. First operand 662 states and 728 transitions. Second operand has 36 states, 35 states have (on average 6.114285714285714) internal successors, (214), 36 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:08,925 INFO L93 Difference]: Finished difference Result 825 states and 919 transitions. [2022-07-14 06:10:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:10:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 6.114285714285714) internal successors, (214), 36 states have internal predecessors, (214), 0 states have call successors, (0), 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 103 [2022-07-14 06:10:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:08,927 INFO L225 Difference]: With dead ends: 825 [2022-07-14 06:10:08,928 INFO L226 Difference]: Without dead ends: 819 [2022-07-14 06:10:08,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 06:10:08,928 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 837 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:08,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 617 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:08,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-07-14 06:10:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 757. [2022-07-14 06:10:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 754 states have (on average 1.1021220159151193) internal successors, (831), 756 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:08,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 831 transitions. [2022-07-14 06:10:08,935 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 831 transitions. Word has length 103 [2022-07-14 06:10:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:08,936 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 831 transitions. [2022-07-14 06:10:08,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 6.114285714285714) internal successors, (214), 36 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 831 transitions. [2022-07-14 06:10:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-14 06:10:08,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:08,937 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:08,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:09,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:09,153 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1743797747, now seen corresponding path program 8 times [2022-07-14 06:10:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:09,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193495731] [2022-07-14 06:10:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:09,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:09,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:09,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193495731] [2022-07-14 06:10:09,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193495731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:09,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504352856] [2022-07-14 06:10:09,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:09,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:09,388 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) [2022-07-14 06:10:09,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:10:09,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:09,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:10:09,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:09,682 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 14 treesize of output 10 [2022-07-14 06:10:09,835 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 15 treesize of output 7 [2022-07-14 06:10:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:09,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:09,939 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 15 treesize of output 13 [2022-07-14 06:10:09,941 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 22 [2022-07-14 06:10:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:10,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504352856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:10,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:10,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 37 [2022-07-14 06:10:10,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300620566] [2022-07-14 06:10:10,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:10,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 06:10:10,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:10,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 06:10:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:10:10,093 INFO L87 Difference]: Start difference. First operand 757 states and 831 transitions. Second operand has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:10,793 INFO L93 Difference]: Finished difference Result 1302 states and 1407 transitions. [2022-07-14 06:10:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:10:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 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 113 [2022-07-14 06:10:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:10,796 INFO L225 Difference]: With dead ends: 1302 [2022-07-14 06:10:10,796 INFO L226 Difference]: Without dead ends: 792 [2022-07-14 06:10:10,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 204 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=2733, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:10:10,798 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 344 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:10,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1190 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:10:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-07-14 06:10:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 777. [2022-07-14 06:10:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 774 states have (on average 1.099483204134367) internal successors, (851), 776 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 851 transitions. [2022-07-14 06:10:10,805 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 851 transitions. Word has length 113 [2022-07-14 06:10:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:10,806 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 851 transitions. [2022-07-14 06:10:10,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.72972972972973) internal successors, (175), 37 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 851 transitions. [2022-07-14 06:10:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-14 06:10:10,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:10,808 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:10,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:11,025 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,SelfDestructingSolverStorable42 [2022-07-14 06:10:11,025 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:11,025 INFO L85 PathProgramCache]: Analyzing trace with hash 732590006, now seen corresponding path program 9 times [2022-07-14 06:10:11,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:11,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572855684] [2022-07-14 06:10:11,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:11,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:11,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572855684] [2022-07-14 06:10:11,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572855684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709358728] [2022-07-14 06:10:11,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:10:11,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:11,304 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) [2022-07-14 06:10:11,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:10:11,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:10:11,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:10:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:11,527 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:11,527 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 [2022-07-14 06:10:11,619 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 15 treesize of output 11 [2022-07-14 06:10:11,719 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:11,719 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 19 treesize of output 19 [2022-07-14 06:10:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-14 06:10:11,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:12,297 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 13 treesize of output 11 [2022-07-14 06:10:12,300 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 20 treesize of output 18 [2022-07-14 06:10:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-14 06:10:12,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709358728] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:12,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:12,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 32 [2022-07-14 06:10:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541018914] [2022-07-14 06:10:12,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:12,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:10:12,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:12,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:10:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:10:12,404 INFO L87 Difference]: Start difference. First operand 777 states and 851 transitions. Second operand has 33 states, 32 states have (on average 5.90625) internal successors, (189), 33 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:12,952 INFO L93 Difference]: Finished difference Result 837 states and 912 transitions. [2022-07-14 06:10:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:10:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.90625) internal successors, (189), 33 states have internal predecessors, (189), 0 states have call successors, (0), 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 117 [2022-07-14 06:10:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:12,953 INFO L225 Difference]: With dead ends: 837 [2022-07-14 06:10:12,954 INFO L226 Difference]: Without dead ends: 491 [2022-07-14 06:10:12,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=2286, Unknown=0, NotChecked=0, Total=2970 [2022-07-14 06:10:12,955 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 854 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:12,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 547 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 606 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-07-14 06:10:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-14 06:10:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 253. [2022-07-14 06:10:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0793650793650793) internal successors, (272), 252 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 272 transitions. [2022-07-14 06:10:12,959 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 272 transitions. Word has length 117 [2022-07-14 06:10:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:12,959 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 272 transitions. [2022-07-14 06:10:12,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.90625) internal successors, (189), 33 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 272 transitions. [2022-07-14 06:10:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-14 06:10:12,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:12,960 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:12,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:13,177 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,SelfDestructingSolverStorable43 [2022-07-14 06:10:13,178 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:13,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1207477221, now seen corresponding path program 5 times [2022-07-14 06:10:13,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:13,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61457746] [2022-07-14 06:10:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:13,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 161 proven. 74 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-14 06:10:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61457746] [2022-07-14 06:10:13,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61457746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698882586] [2022-07-14 06:10:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:13,346 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) [2022-07-14 06:10:13,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:10:13,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-14 06:10:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:10:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:13,572 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:13,572 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 [2022-07-14 06:10:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 66 proven. 260 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:10:15,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 91 proven. 235 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:10:16,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698882586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:16,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:16,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23, 23] total 58 [2022-07-14 06:10:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372504748] [2022-07-14 06:10:16,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:16,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-14 06:10:16,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-14 06:10:16,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 06:10:16,200 INFO L87 Difference]: Start difference. First operand 253 states and 272 transitions. Second operand has 58 states, 58 states have (on average 5.5) internal successors, (319), 58 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:16,684 INFO L93 Difference]: Finished difference Result 305 states and 328 transitions. [2022-07-14 06:10:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:10:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.5) internal successors, (319), 58 states have internal predecessors, (319), 0 states have call successors, (0), 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 126 [2022-07-14 06:10:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:16,685 INFO L225 Difference]: With dead ends: 305 [2022-07-14 06:10:16,685 INFO L226 Difference]: Without dead ends: 181 [2022-07-14 06:10:16,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=808, Invalid=5512, Unknown=0, NotChecked=0, Total=6320 [2022-07-14 06:10:16,687 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 48 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:16,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 875 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2022-07-14 06:10:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-14 06:10:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-07-14 06:10:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0833333333333333) internal successors, (195), 180 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 195 transitions. [2022-07-14 06:10:16,689 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 195 transitions. Word has length 126 [2022-07-14 06:10:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:16,689 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 195 transitions. [2022-07-14 06:10:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.5) internal successors, (319), 58 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 195 transitions. [2022-07-14 06:10:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-14 06:10:16,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:16,690 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:16,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:16,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:16,904 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash 819326840, now seen corresponding path program 6 times [2022-07-14 06:10:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:16,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061943664] [2022-07-14 06:10:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:16,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 94 proven. 250 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:10:17,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:17,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061943664] [2022-07-14 06:10:17,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061943664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:17,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015342791] [2022-07-14 06:10:17,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:17,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:17,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:17,478 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) [2022-07-14 06:10:17,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:10:17,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:10:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:10:17,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:17,806 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 [2022-07-14 06:10:18,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:10:18,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:18,387 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:10:18,387 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 30 treesize of output 23 [2022-07-14 06:10:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 16 proven. 241 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-14 06:10:18,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:18,585 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1281 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1281) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:10:18,588 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:18,589 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:18,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:18,593 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 37 treesize of output 37 [2022-07-14 06:10:18,596 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 11 treesize of output 7 [2022-07-14 06:10:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 13 proven. 244 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-14 06:10:18,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015342791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:18,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:18,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 51 [2022-07-14 06:10:18,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753389610] [2022-07-14 06:10:18,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:18,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:10:18,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:10:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2284, Unknown=1, NotChecked=96, Total=2550 [2022-07-14 06:10:18,812 INFO L87 Difference]: Start difference. First operand 181 states and 195 transitions. Second operand has 51 states, 51 states have (on average 3.9607843137254903) internal successors, (202), 51 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:19,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:19,618 INFO L93 Difference]: Finished difference Result 328 states and 352 transitions. [2022-07-14 06:10:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:10:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9607843137254903) internal successors, (202), 51 states have internal predecessors, (202), 0 states have call successors, (0), 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 130 [2022-07-14 06:10:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:19,619 INFO L225 Difference]: With dead ends: 328 [2022-07-14 06:10:19,619 INFO L226 Difference]: Without dead ends: 188 [2022-07-14 06:10:19,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 228 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=345, Invalid=4628, Unknown=1, NotChecked=138, Total=5112 [2022-07-14 06:10:19,620 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 199 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:19,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1072 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1482 Invalid, 0 Unknown, 315 Unchecked, 0.4s Time] [2022-07-14 06:10:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-14 06:10:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2022-07-14 06:10:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0815217391304348) internal successors, (199), 184 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 199 transitions. [2022-07-14 06:10:19,622 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 199 transitions. Word has length 130 [2022-07-14 06:10:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:19,622 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 199 transitions. [2022-07-14 06:10:19,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9607843137254903) internal successors, (202), 51 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 199 transitions. [2022-07-14 06:10:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-14 06:10:19,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:19,623 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:19,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:19,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:19,838 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:19,839 INFO L85 PathProgramCache]: Analyzing trace with hash 893220693, now seen corresponding path program 7 times [2022-07-14 06:10:19,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:19,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073760419] [2022-07-14 06:10:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:19,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 28 proven. 245 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-14 06:10:20,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:20,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073760419] [2022-07-14 06:10:20,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073760419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:20,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172820299] [2022-07-14 06:10:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:20,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:20,042 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) [2022-07-14 06:10:20,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:10:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:10:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:10:20,203 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 [2022-07-14 06:10:20,205 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 [2022-07-14 06:10:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-14 06:10:20,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-14 06:10:21,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172820299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:21,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:21,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-07-14 06:10:21,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836151769] [2022-07-14 06:10:21,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:10:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:10:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:10:21,391 INFO L87 Difference]: Start difference. First operand 185 states and 199 transitions. Second operand has 46 states, 45 states have (on average 6.4) internal successors, (288), 46 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:22,047 INFO L93 Difference]: Finished difference Result 227 states and 245 transitions. [2022-07-14 06:10:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:10:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 6.4) internal successors, (288), 46 states have internal predecessors, (288), 0 states have call successors, (0), 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 134 [2022-07-14 06:10:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:22,048 INFO L225 Difference]: With dead ends: 227 [2022-07-14 06:10:22,048 INFO L226 Difference]: Without dead ends: 227 [2022-07-14 06:10:22,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=621, Invalid=3039, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:10:22,049 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 815 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:22,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 709 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:10:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-14 06:10:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2022-07-14 06:10:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0833333333333333) internal successors, (221), 204 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 221 transitions. [2022-07-14 06:10:22,050 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 221 transitions. Word has length 134 [2022-07-14 06:10:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:22,051 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 221 transitions. [2022-07-14 06:10:22,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 6.4) internal successors, (288), 46 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 221 transitions. [2022-07-14 06:10:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-14 06:10:22,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:22,051 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:22,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:22,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:22,259 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1094920162, now seen corresponding path program 8 times [2022-07-14 06:10:22,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:22,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266408098] [2022-07-14 06:10:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:22,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 32 proven. 385 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:22,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266408098] [2022-07-14 06:10:22,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266408098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:22,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051043463] [2022-07-14 06:10:22,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:22,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:22,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:22,757 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) [2022-07-14 06:10:22,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:10:22,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:22,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:22,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:10:22,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:23,133 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 14 treesize of output 10 [2022-07-14 06:10:23,485 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:10:23,485 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 30 treesize of output 23 [2022-07-14 06:10:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 15 proven. 364 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:10:23,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:23,791 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 15 treesize of output 13 [2022-07-14 06:10:23,792 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 22 [2022-07-14 06:10:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 15 proven. 364 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:10:24,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051043463] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:24,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:24,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 54 [2022-07-14 06:10:24,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097783223] [2022-07-14 06:10:24,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-14 06:10:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-14 06:10:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2694, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:10:24,016 INFO L87 Difference]: Start difference. First operand 205 states and 221 transitions. Second operand has 54 states, 54 states have (on average 4.074074074074074) internal successors, (220), 54 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:26,139 INFO L93 Difference]: Finished difference Result 598 states and 643 transitions. [2022-07-14 06:10:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-14 06:10:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.074074074074074) internal successors, (220), 54 states have internal predecessors, (220), 0 states have call successors, (0), 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 144 [2022-07-14 06:10:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:26,141 INFO L225 Difference]: With dead ends: 598 [2022-07-14 06:10:26,141 INFO L226 Difference]: Without dead ends: 598 [2022-07-14 06:10:26,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 262 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=923, Invalid=7633, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 06:10:26,142 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 806 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:26,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 1273 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2287 Invalid, 0 Unknown, 50 Unchecked, 0.8s Time] [2022-07-14 06:10:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-07-14 06:10:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 561. [2022-07-14 06:10:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 1.082142857142857) internal successors, (606), 560 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 606 transitions. [2022-07-14 06:10:26,147 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 606 transitions. Word has length 144 [2022-07-14 06:10:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 606 transitions. [2022-07-14 06:10:26,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.074074074074074) internal successors, (220), 54 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 606 transitions. [2022-07-14 06:10:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-14 06:10:26,148 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:26,148 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:26,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-14 06:10:26,361 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,SelfDestructingSolverStorable47 [2022-07-14 06:10:26,361 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 44916159, now seen corresponding path program 9 times [2022-07-14 06:10:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793948061] [2022-07-14 06:10:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:26,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 4 proven. 464 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:10:27,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793948061] [2022-07-14 06:10:27,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793948061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176773581] [2022-07-14 06:10:27,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:10:27,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:27,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:27,136 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) [2022-07-14 06:10:27,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:10:27,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-14 06:10:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:10:27,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:27,623 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 [2022-07-14 06:10:28,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:10:28,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:28,996 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 06:10:28,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2022-07-14 06:10:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 18 proven. 331 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-14 06:10:29,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:29,871 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1505 (Array Int Int)) (|ULTIMATE.start_subseq_~pt~0#1.base| Int) (|ULTIMATE.start_subseq_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1505))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_subseq_~pt~0#1.base|) |ULTIMATE.start_subseq_~pt~0#1.offset|))) (or (= .cse0 0) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)))))) is different from false [2022-07-14 06:10:29,875 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:29,875 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:10:29,889 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:29,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2022-07-14 06:10:29,897 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:29,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:10:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 15 proven. 334 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-14 06:10:30,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176773581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:30,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:30,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25, 25] total 72 [2022-07-14 06:10:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959365093] [2022-07-14 06:10:30,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:30,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-14 06:10:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-14 06:10:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4762, Unknown=1, NotChecked=138, Total=5112 [2022-07-14 06:10:30,353 INFO L87 Difference]: Start difference. First operand 561 states and 606 transitions. Second operand has 72 states, 72 states have (on average 4.694444444444445) internal successors, (338), 72 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:32,420 INFO L93 Difference]: Finished difference Result 1104 states and 1191 transitions. [2022-07-14 06:10:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-14 06:10:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.694444444444445) internal successors, (338), 72 states have internal predecessors, (338), 0 states have call successors, (0), 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 148 [2022-07-14 06:10:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:32,422 INFO L225 Difference]: With dead ends: 1104 [2022-07-14 06:10:32,422 INFO L226 Difference]: Without dead ends: 568 [2022-07-14 06:10:32,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 8 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=524, Invalid=9985, Unknown=1, NotChecked=202, Total=10712 [2022-07-14 06:10:32,423 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 197 mSDsluCounter, 2515 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 2583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 819 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:32,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 2575 Invalid, 2583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1710 Invalid, 0 Unknown, 819 Unchecked, 0.6s Time] [2022-07-14 06:10:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-07-14 06:10:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 565. [2022-07-14 06:10:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.0815602836879432) internal successors, (610), 564 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 610 transitions. [2022-07-14 06:10:32,427 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 610 transitions. Word has length 148 [2022-07-14 06:10:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:32,428 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 610 transitions. [2022-07-14 06:10:32,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.694444444444445) internal successors, (338), 72 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 610 transitions. [2022-07-14 06:10:32,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-14 06:10:32,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:32,429 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:32,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:32,639 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,SelfDestructingSolverStorable48 [2022-07-14 06:10:32,639 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1057519524, now seen corresponding path program 10 times [2022-07-14 06:10:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:32,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186763706] [2022-07-14 06:10:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:32,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 45 proven. 324 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-07-14 06:10:32,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186763706] [2022-07-14 06:10:32,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186763706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705416540] [2022-07-14 06:10:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:10:32,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:32,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:32,878 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) [2022-07-14 06:10:32,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:10:33,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:10:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:10:33,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:33,058 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:33,058 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 [2022-07-14 06:10:33,065 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 [2022-07-14 06:10:33,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-07-14 06:10:33,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:10:33,857 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:33,857 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 19 treesize of output 19 [2022-07-14 06:10:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 72 proven. 305 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-14 06:10:34,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:34,547 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_subseq_~ps~0#1.offset_164| Int) (v_ArrVal_1590 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1590) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |v_ULTIMATE.start_subseq_~ps~0#1.offset_164|)) 0) (<= (+ |v_ULTIMATE.start_subseq_~ps~0#1.offset_164| 8) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_subseq_~ps~0#1.offset_164|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_subseq_~ps~0#1.offset_164|))) is different from false [2022-07-14 06:10:34,552 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:34,552 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:34,557 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:34,557 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 37 treesize of output 37 [2022-07-14 06:10:34,559 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 11 treesize of output 7 [2022-07-14 06:10:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 97 proven. 280 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-14 06:10:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705416540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:35,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:35,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 23] total 62 [2022-07-14 06:10:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100213905] [2022-07-14 06:10:35,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-14 06:10:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-14 06:10:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=3376, Unknown=1, NotChecked=120, Total=3906 [2022-07-14 06:10:35,690 INFO L87 Difference]: Start difference. First operand 565 states and 610 transitions. Second operand has 63 states, 62 states have (on average 5.693548387096774) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:36,806 INFO L93 Difference]: Finished difference Result 641 states and 692 transitions. [2022-07-14 06:10:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:10:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 5.693548387096774) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 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 152 [2022-07-14 06:10:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:36,808 INFO L225 Difference]: With dead ends: 641 [2022-07-14 06:10:36,808 INFO L226 Difference]: Without dead ends: 641 [2022-07-14 06:10:36,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1081, Invalid=5242, Unknown=1, NotChecked=156, Total=6480 [2022-07-14 06:10:36,809 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1352 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:36,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1228 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1521 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2022-07-14 06:10:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-07-14 06:10:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 615. [2022-07-14 06:10:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 1.0814332247557004) internal successors, (664), 614 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 664 transitions. [2022-07-14 06:10:36,814 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 664 transitions. Word has length 152 [2022-07-14 06:10:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:36,814 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 664 transitions. [2022-07-14 06:10:36,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 5.693548387096774) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 664 transitions. [2022-07-14 06:10:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-14 06:10:36,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:36,815 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:36,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:37,032 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,SelfDestructingSolverStorable49 [2022-07-14 06:10:37,032 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:37,033 INFO L85 PathProgramCache]: Analyzing trace with hash -256857511, now seen corresponding path program 11 times [2022-07-14 06:10:37,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:37,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206200946] [2022-07-14 06:10:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 379 proven. 165 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-14 06:10:37,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:37,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206200946] [2022-07-14 06:10:37,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206200946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:37,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126120016] [2022-07-14 06:10:37,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:37,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:37,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:37,289 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) [2022-07-14 06:10:37,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:10:37,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-14 06:10:37,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 06:10:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:37,646 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:37,646 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 [2022-07-14 06:10:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 453 proven. 91 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-14 06:10:38,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 393 proven. 151 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-14 06:10:38,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126120016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:38,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:38,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 51 [2022-07-14 06:10:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461222942] [2022-07-14 06:10:38,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:38,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:10:38,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:38,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:10:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2117, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:10:38,570 INFO L87 Difference]: Start difference. First operand 615 states and 664 transitions. Second operand has 51 states, 51 states have (on average 5.882352941176471) internal successors, (300), 51 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:39,064 INFO L93 Difference]: Finished difference Result 658 states and 699 transitions. [2022-07-14 06:10:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:10:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.882352941176471) internal successors, (300), 51 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-14 06:10:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:39,092 INFO L225 Difference]: With dead ends: 658 [2022-07-14 06:10:39,092 INFO L226 Difference]: Without dead ends: 256 [2022-07-14 06:10:39,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=921, Invalid=3771, Unknown=0, NotChecked=0, Total=4692 [2022-07-14 06:10:39,095 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 275 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:39,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 785 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:39,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-14 06:10:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2022-07-14 06:10:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0833333333333333) internal successors, (273), 252 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 273 transitions. [2022-07-14 06:10:39,098 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 273 transitions. Word has length 168 [2022-07-14 06:10:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:39,098 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 273 transitions. [2022-07-14 06:10:39,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.882352941176471) internal successors, (300), 51 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 273 transitions. [2022-07-14 06:10:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-14 06:10:39,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:39,099 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:39,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:39,300 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,SelfDestructingSolverStorable50 [2022-07-14 06:10:39,300 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:39,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash -216427594, now seen corresponding path program 12 times [2022-07-14 06:10:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:39,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374981474] [2022-07-14 06:10:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:39,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 376 proven. 204 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:10:39,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374981474] [2022-07-14 06:10:39,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374981474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924954069] [2022-07-14 06:10:39,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:39,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:39,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:39,554 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) [2022-07-14 06:10:39,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:10:40,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-14 06:10:40,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 06:10:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:40,115 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:40,116 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 [2022-07-14 06:10:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 460 proven. 120 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:10:40,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 460 proven. 120 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:10:40,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924954069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:40,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:40,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 57 [2022-07-14 06:10:40,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384866973] [2022-07-14 06:10:40,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:40,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-14 06:10:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-14 06:10:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2022-07-14 06:10:40,967 INFO L87 Difference]: Start difference. First operand 253 states and 273 transitions. Second operand has 57 states, 57 states have (on average 5.9298245614035086) internal successors, (338), 57 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:41,272 INFO L93 Difference]: Finished difference Result 762 states and 818 transitions. [2022-07-14 06:10:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:10:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.9298245614035086) internal successors, (338), 57 states have internal predecessors, (338), 0 states have call successors, (0), 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 172 [2022-07-14 06:10:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:41,274 INFO L225 Difference]: With dead ends: 762 [2022-07-14 06:10:41,274 INFO L226 Difference]: Without dead ends: 260 [2022-07-14 06:10:41,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1001, Invalid=3691, Unknown=0, NotChecked=0, Total=4692 [2022-07-14 06:10:41,280 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 160 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:41,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 668 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-14 06:10:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2022-07-14 06:10:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.08203125) internal successors, (277), 256 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 277 transitions. [2022-07-14 06:10:41,286 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 277 transitions. Word has length 172 [2022-07-14 06:10:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:41,286 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 277 transitions. [2022-07-14 06:10:41,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.9298245614035086) internal successors, (338), 57 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 277 transitions. [2022-07-14 06:10:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-07-14 06:10:41,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:41,287 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:41,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:41,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:41,504 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash 726854675, now seen corresponding path program 13 times [2022-07-14 06:10:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161003440] [2022-07-14 06:10:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:41,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 386 proven. 155 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-14 06:10:41,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:41,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161003440] [2022-07-14 06:10:41,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161003440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:41,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261570602] [2022-07-14 06:10:41,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:41,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:41,722 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) [2022-07-14 06:10:41,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:10:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:41,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:10:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:10:41,927 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 [2022-07-14 06:10:41,929 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 [2022-07-14 06:10:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 450 proven. 91 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-14 06:10:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 442 proven. 99 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-14 06:10:42,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261570602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:42,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:42,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 48 [2022-07-14 06:10:42,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363668765] [2022-07-14 06:10:42,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:42,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 06:10:42,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:42,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 06:10:42,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1853, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:10:42,617 INFO L87 Difference]: Start difference. First operand 257 states and 277 transitions. Second operand has 48 states, 48 states have (on average 6.145833333333333) internal successors, (295), 48 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:43,028 INFO L93 Difference]: Finished difference Result 468 states and 504 transitions. [2022-07-14 06:10:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:10:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.145833333333333) internal successors, (295), 48 states have internal predecessors, (295), 0 states have call successors, (0), 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 176 [2022-07-14 06:10:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:43,029 INFO L225 Difference]: With dead ends: 468 [2022-07-14 06:10:43,029 INFO L226 Difference]: Without dead ends: 264 [2022-07-14 06:10:43,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=816, Invalid=3344, Unknown=0, NotChecked=0, Total=4160 [2022-07-14 06:10:43,030 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 248 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:43,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 686 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-14 06:10:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2022-07-14 06:10:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0807692307692307) internal successors, (281), 260 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 281 transitions. [2022-07-14 06:10:43,033 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 281 transitions. Word has length 176 [2022-07-14 06:10:43,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:43,033 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 281 transitions. [2022-07-14 06:10:43,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.145833333333333) internal successors, (295), 48 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:43,033 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 281 transitions. [2022-07-14 06:10:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-14 06:10:43,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:43,034 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:43,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:43,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-14 06:10:43,240 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:43,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1746483504, now seen corresponding path program 14 times [2022-07-14 06:10:43,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:43,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470642117] [2022-07-14 06:10:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 148 proven. 577 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:10:44,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:44,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470642117] [2022-07-14 06:10:44,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470642117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:44,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96275050] [2022-07-14 06:10:44,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:44,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:44,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:44,225 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:44,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:10:44,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:44,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:44,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-14 06:10:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:44,750 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 14 treesize of output 10 [2022-07-14 06:10:45,841 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-14 06:10:45,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2022-07-14 06:10:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 19 proven. 594 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:10:45,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:46,800 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:46,801 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 91 treesize of output 91 [2022-07-14 06:10:46,830 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 36 treesize of output 32 [2022-07-14 06:10:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 19 proven. 594 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:10:47,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96275050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:47,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:47,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 80 [2022-07-14 06:10:47,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775036096] [2022-07-14 06:10:47,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:47,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-14 06:10:47,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:47,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-14 06:10:47,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=6098, Unknown=0, NotChecked=0, Total=6320 [2022-07-14 06:10:47,040 INFO L87 Difference]: Start difference. First operand 261 states and 281 transitions. Second operand has 80 states, 80 states have (on average 5.325) internal successors, (426), 80 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:53,110 INFO L93 Difference]: Finished difference Result 1460 states and 1577 transitions. [2022-07-14 06:10:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-07-14 06:10:53,111 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 5.325) internal successors, (426), 80 states have internal predecessors, (426), 0 states have call successors, (0), 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 180 [2022-07-14 06:10:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:53,113 INFO L225 Difference]: With dead ends: 1460 [2022-07-14 06:10:53,113 INFO L226 Difference]: Without dead ends: 888 [2022-07-14 06:10:53,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 329 SyntacticMatches, 14 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 12925 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1105, Invalid=42367, Unknown=0, NotChecked=0, Total=43472 [2022-07-14 06:10:53,117 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 269 mSDsluCounter, 10969 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 11187 SdHoareTripleChecker+Invalid, 4921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1892 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:53,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 11187 Invalid, 4921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2978 Invalid, 0 Unknown, 1892 Unchecked, 0.9s Time] [2022-07-14 06:10:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-07-14 06:10:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 868. [2022-07-14 06:10:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.0807381776239908) internal successors, (937), 867 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 937 transitions. [2022-07-14 06:10:53,124 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 937 transitions. Word has length 180 [2022-07-14 06:10:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:53,124 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 937 transitions. [2022-07-14 06:10:53,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 5.325) internal successors, (426), 80 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 937 transitions. [2022-07-14 06:10:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-14 06:10:53,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:53,126 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:53,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-14 06:10:53,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:53,334 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1449780528, now seen corresponding path program 15 times [2022-07-14 06:10:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:53,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872781783] [2022-07-14 06:10:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 73 proven. 651 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:10:54,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872781783] [2022-07-14 06:10:54,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872781783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:54,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491057168] [2022-07-14 06:10:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:10:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:54,128 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:54,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:10:55,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-14 06:10:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-14 06:10:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:55,026 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 [2022-07-14 06:10:55,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:10:55,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:56,686 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:10:56,686 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 30 treesize of output 23 [2022-07-14 06:10:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 19 proven. 704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:10:56,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:57,024 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2011 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2011) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:10:57,028 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:57,028 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:57,032 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:57,032 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 37 treesize of output 37 [2022-07-14 06:10:57,034 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 11 treesize of output 7 [2022-07-14 06:10:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 733 backedges. 19 proven. 552 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-14 06:10:57,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491057168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:57,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:57,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 37, 29] total 87 [2022-07-14 06:10:57,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351472588] [2022-07-14 06:10:57,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:57,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-14 06:10:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-14 06:10:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=6980, Unknown=1, NotChecked=168, Total=7482 [2022-07-14 06:10:57,633 INFO L87 Difference]: Start difference. First operand 868 states and 937 transitions. Second operand has 87 states, 87 states have (on average 4.494252873563219) internal successors, (391), 87 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:59,813 INFO L93 Difference]: Finished difference Result 1409 states and 1521 transitions. [2022-07-14 06:10:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-14 06:10:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.494252873563219) internal successors, (391), 87 states have internal predecessors, (391), 0 states have call successors, (0), 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 180 [2022-07-14 06:10:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:59,816 INFO L225 Difference]: With dead ends: 1409 [2022-07-14 06:10:59,816 INFO L226 Difference]: Without dead ends: 814 [2022-07-14 06:10:59,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=542, Invalid=11233, Unknown=1, NotChecked=214, Total=11990 [2022-07-14 06:10:59,817 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 208 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 4019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:59,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 2601 Invalid, 4019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 3763 Invalid, 0 Unknown, 208 Unchecked, 1.2s Time] [2022-07-14 06:10:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-07-14 06:10:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 811. [2022-07-14 06:10:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.0827160493827162) internal successors, (877), 810 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 877 transitions. [2022-07-14 06:10:59,823 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 877 transitions. Word has length 180 [2022-07-14 06:10:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:59,823 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 877 transitions. [2022-07-14 06:10:59,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.494252873563219) internal successors, (391), 87 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 877 transitions. [2022-07-14 06:10:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-14 06:10:59,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:59,825 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:59,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:00,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:00,051 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash -941173427, now seen corresponding path program 16 times [2022-07-14 06:11:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056312984] [2022-07-14 06:11:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:00,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 91 proven. 512 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-07-14 06:11:00,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056312984] [2022-07-14 06:11:00,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056312984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:00,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200161391] [2022-07-14 06:11:00,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:11:00,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:00,388 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:00,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:11:00,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:11:00,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-14 06:11:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:00,603 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:11:00,603 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 [2022-07-14 06:11:00,975 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 13 treesize of output 9 [2022-07-14 06:11:01,763 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 [2022-07-14 06:11:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 442 proven. 171 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:01,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:02,693 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 13 treesize of output 11 [2022-07-14 06:11:02,695 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 20 treesize of output 18 [2022-07-14 06:11:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 356 proven. 257 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:03,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200161391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:03,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:03,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 30] total 77 [2022-07-14 06:11:03,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095668231] [2022-07-14 06:11:03,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:03,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-14 06:11:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:03,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-14 06:11:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=5321, Unknown=0, NotChecked=0, Total=5852 [2022-07-14 06:11:03,798 INFO L87 Difference]: Start difference. First operand 811 states and 877 transitions. Second operand has 77 states, 77 states have (on average 5.675324675324675) internal successors, (437), 77 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:06,553 INFO L93 Difference]: Finished difference Result 1842 states and 1957 transitions. [2022-07-14 06:11:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-14 06:11:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 5.675324675324675) internal successors, (437), 77 states have internal predecessors, (437), 0 states have call successors, (0), 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 184 [2022-07-14 06:11:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:06,556 INFO L225 Difference]: With dead ends: 1842 [2022-07-14 06:11:06,556 INFO L226 Difference]: Without dead ends: 1237 [2022-07-14 06:11:06,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9228 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3075, Invalid=28787, Unknown=0, NotChecked=0, Total=31862 [2022-07-14 06:11:06,561 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 278 mSDsluCounter, 6294 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 6516 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 807 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 6516 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 945 Invalid, 0 Unknown, 807 Unchecked, 0.3s Time] [2022-07-14 06:11:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-07-14 06:11:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 695. [2022-07-14 06:11:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.0778097982708934) internal successors, (748), 694 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 748 transitions. [2022-07-14 06:11:06,584 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 748 transitions. Word has length 184 [2022-07-14 06:11:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:06,584 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 748 transitions. [2022-07-14 06:11:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 5.675324675324675) internal successors, (437), 77 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 748 transitions. [2022-07-14 06:11:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-14 06:11:06,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:06,597 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:06,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-14 06:11:06,797 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash -19244083, now seen corresponding path program 17 times [2022-07-14 06:11:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297939242] [2022-07-14 06:11:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 91 proven. 513 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-14 06:11:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297939242] [2022-07-14 06:11:07,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297939242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:07,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055664517] [2022-07-14 06:11:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:11:07,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:07,065 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:07,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:11:07,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-14 06:11:07,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:07,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:11:07,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:07,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:07,530 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 [2022-07-14 06:11:07,532 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 [2022-07-14 06:11:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 120 proven. 484 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-14 06:11:08,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 153 proven. 451 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-14 06:11:09,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055664517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:09,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:09,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 60 [2022-07-14 06:11:09,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464293864] [2022-07-14 06:11:09,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:09,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-14 06:11:09,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-14 06:11:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=3232, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:11:09,274 INFO L87 Difference]: Start difference. First operand 695 states and 748 transitions. Second operand has 61 states, 60 states have (on average 6.866666666666666) internal successors, (412), 61 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:10,127 INFO L93 Difference]: Finished difference Result 1089 states and 1170 transitions. [2022-07-14 06:11:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:11:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 6.866666666666666) internal successors, (412), 61 states have internal predecessors, (412), 0 states have call successors, (0), 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 184 [2022-07-14 06:11:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:10,129 INFO L225 Difference]: With dead ends: 1089 [2022-07-14 06:11:10,129 INFO L226 Difference]: Without dead ends: 1077 [2022-07-14 06:11:10,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=901, Invalid=4501, Unknown=0, NotChecked=0, Total=5402 [2022-07-14 06:11:10,130 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 1315 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:10,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 1179 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:11:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-07-14 06:11:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 715. [2022-07-14 06:11:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.07703081232493) internal successors, (769), 714 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 769 transitions. [2022-07-14 06:11:10,136 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 769 transitions. Word has length 184 [2022-07-14 06:11:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:10,136 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 769 transitions. [2022-07-14 06:11:10,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 6.866666666666666) internal successors, (412), 61 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 769 transitions. [2022-07-14 06:11:10,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-14 06:11:10,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:10,146 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:10,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:10,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-14 06:11:10,363 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1071458906, now seen corresponding path program 18 times [2022-07-14 06:11:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910542192] [2022-07-14 06:11:10,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:10,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 467 proven. 247 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:10,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910542192] [2022-07-14 06:11:10,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910542192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490506514] [2022-07-14 06:11:10,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:11:10,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:10,688 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:10,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:11:11,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-14 06:11:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:11:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:11,664 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:11:11,665 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 [2022-07-14 06:11:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 561 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:12,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 561 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:12,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490506514] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:12,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:12,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 61 [2022-07-14 06:11:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655983363] [2022-07-14 06:11:12,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-14 06:11:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-14 06:11:12,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=3046, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:11:12,625 INFO L87 Difference]: Start difference. First operand 715 states and 769 transitions. Second operand has 61 states, 61 states have (on average 6.065573770491803) internal successors, (370), 61 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:13,192 INFO L93 Difference]: Finished difference Result 859 states and 902 transitions. [2022-07-14 06:11:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:11:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 6.065573770491803) internal successors, (370), 61 states have internal predecessors, (370), 0 states have call successors, (0), 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 194 [2022-07-14 06:11:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:13,193 INFO L225 Difference]: With dead ends: 859 [2022-07-14 06:11:13,193 INFO L226 Difference]: Without dead ends: 292 [2022-07-14 06:11:13,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1308, Invalid=5498, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:11:13,194 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 244 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:13,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 854 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:11:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-07-14 06:11:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2022-07-14 06:11:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0798611111111112) internal successors, (311), 288 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 311 transitions. [2022-07-14 06:11:13,196 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 311 transitions. Word has length 194 [2022-07-14 06:11:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:13,197 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 311 transitions. [2022-07-14 06:11:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.065573770491803) internal successors, (370), 61 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 311 transitions. [2022-07-14 06:11:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-14 06:11:13,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:13,198 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:13,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:13,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-14 06:11:13,416 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1872359159, now seen corresponding path program 19 times [2022-07-14 06:11:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:13,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763785001] [2022-07-14 06:11:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:13,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 21 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:11:15,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763785001] [2022-07-14 06:11:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763785001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820927025] [2022-07-14 06:11:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:11:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:15,036 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:15,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-14 06:11:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-14 06:11:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:15,802 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 14 treesize of output 10 [2022-07-14 06:11:16,279 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:11:16,280 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 30 treesize of output 23 [2022-07-14 06:11:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 21 proven. 730 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:16,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:16,603 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 15 treesize of output 13 [2022-07-14 06:11:16,604 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 22 [2022-07-14 06:11:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 21 proven. 730 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:11:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820927025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:16,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 32, 32] total 72 [2022-07-14 06:11:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280324837] [2022-07-14 06:11:16,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-14 06:11:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-14 06:11:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4913, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 06:11:16,875 INFO L87 Difference]: Start difference. First operand 289 states and 311 transitions. Second operand has 72 states, 72 states have (on average 4.138888888888889) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:22,268 INFO L93 Difference]: Finished difference Result 1953 states and 2109 transitions. [2022-07-14 06:11:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-07-14 06:11:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.138888888888889) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 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 198 [2022-07-14 06:11:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:22,273 INFO L225 Difference]: With dead ends: 1953 [2022-07-14 06:11:22,273 INFO L226 Difference]: Without dead ends: 1953 [2022-07-14 06:11:22,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 362 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3527 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1295, Invalid=18165, Unknown=0, NotChecked=0, Total=19460 [2022-07-14 06:11:22,274 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 885 mSDsluCounter, 4470 mSDsCounter, 0 mSdLazyCounter, 6960 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 7550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 6960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:22,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 4555 Invalid, 7550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 6960 Invalid, 0 Unknown, 460 Unchecked, 2.1s Time] [2022-07-14 06:11:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-07-14 06:11:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 945. [2022-07-14 06:11:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 1.083686440677966) internal successors, (1023), 944 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1023 transitions. [2022-07-14 06:11:22,300 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1023 transitions. Word has length 198 [2022-07-14 06:11:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:22,300 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1023 transitions. [2022-07-14 06:11:22,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.138888888888889) internal successors, (298), 72 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1023 transitions. [2022-07-14 06:11:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-14 06:11:22,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:22,317 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:22,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:22,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-14 06:11:22,527 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:22,528 INFO L85 PathProgramCache]: Analyzing trace with hash 871963924, now seen corresponding path program 20 times [2022-07-14 06:11:22,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:22,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448613168] [2022-07-14 06:11:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 166 proven. 770 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:11:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:23,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448613168] [2022-07-14 06:11:23,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448613168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:23,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529348034] [2022-07-14 06:11:23,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:11:23,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:23,314 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:23,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-14 06:11:23,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:11:23,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-14 06:11:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:23,584 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 [2022-07-14 06:11:24,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:11:24,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:11:24,445 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 15 treesize of output 7 [2022-07-14 06:11:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 81 proven. 631 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-14 06:11:24,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:24,591 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2489 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2489) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 9 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:11:24,594 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:24,595 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:11:24,599 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:24,599 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 37 treesize of output 37 [2022-07-14 06:11:24,601 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 11 treesize of output 7 [2022-07-14 06:11:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 81 proven. 631 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-14 06:11:25,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529348034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:25,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:25,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 28, 28] total 57 [2022-07-14 06:11:25,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139821875] [2022-07-14 06:11:25,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:25,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-14 06:11:25,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-14 06:11:25,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2895, Unknown=1, NotChecked=108, Total=3192 [2022-07-14 06:11:25,052 INFO L87 Difference]: Start difference. First operand 945 states and 1023 transitions. Second operand has 57 states, 57 states have (on average 4.87719298245614) internal successors, (278), 57 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:27,397 INFO L93 Difference]: Finished difference Result 1828 states and 1977 transitions. [2022-07-14 06:11:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-14 06:11:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.87719298245614) internal successors, (278), 57 states have internal predecessors, (278), 0 states have call successors, (0), 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 202 [2022-07-14 06:11:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:27,400 INFO L225 Difference]: With dead ends: 1828 [2022-07-14 06:11:27,400 INFO L226 Difference]: Without dead ends: 952 [2022-07-14 06:11:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 376 SyntacticMatches, 10 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=451, Invalid=7384, Unknown=1, NotChecked=174, Total=8010 [2022-07-14 06:11:27,401 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 208 mSDsluCounter, 2889 mSDsCounter, 0 mSdLazyCounter, 4202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2971 SdHoareTripleChecker+Invalid, 4498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:27,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 2971 Invalid, 4498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4202 Invalid, 0 Unknown, 255 Unchecked, 1.3s Time] [2022-07-14 06:11:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-07-14 06:11:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 949. [2022-07-14 06:11:27,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 1.0833333333333333) internal successors, (1027), 948 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1027 transitions. [2022-07-14 06:11:27,407 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1027 transitions. Word has length 202 [2022-07-14 06:11:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:27,407 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1027 transitions. [2022-07-14 06:11:27,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.87719298245614) internal successors, (278), 57 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1027 transitions. [2022-07-14 06:11:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-14 06:11:27,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:27,409 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:27,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:27,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:27,620 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1165496305, now seen corresponding path program 21 times [2022-07-14 06:11:27,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:27,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712438017] [2022-07-14 06:11:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:27,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 120 proven. 621 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-07-14 06:11:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:27,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712438017] [2022-07-14 06:11:27,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712438017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:27,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852632518] [2022-07-14 06:11:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:27,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:27,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:28,020 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:28,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-14 06:11:30,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-14 06:11:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:11:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:30,149 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 [2022-07-14 06:11:30,153 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 [2022-07-14 06:11:30,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-14 06:11:30,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:11:31,438 INFO L356 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2022-07-14 06:11:31,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2022-07-14 06:11:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2022-07-14 06:11:31,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:32,892 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:32,892 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:11:32,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:32,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2022-07-14 06:11:32,917 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:32,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:11:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2022-07-14 06:11:33,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852632518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:33,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:33,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11, 11] total 44 [2022-07-14 06:11:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389775355] [2022-07-14 06:11:33,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:11:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:11:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1777, Unknown=9, NotChecked=0, Total=1980 [2022-07-14 06:11:33,914 INFO L87 Difference]: Start difference. First operand 949 states and 1027 transitions. Second operand has 45 states, 44 states have (on average 5.113636363636363) internal successors, (225), 45 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) [2022-07-14 06:11:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:36,113 INFO L93 Difference]: Finished difference Result 1090 states and 1170 transitions. [2022-07-14 06:11:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-14 06:11:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.113636363636363) internal successors, (225), 45 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 206 [2022-07-14 06:11:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:36,114 INFO L225 Difference]: With dead ends: 1090 [2022-07-14 06:11:36,114 INFO L226 Difference]: Without dead ends: 0 [2022-07-14 06:11:36,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 409 SyntacticMatches, 9 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3926 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1193, Invalid=13318, Unknown=9, NotChecked=0, Total=14520 [2022-07-14 06:11:36,115 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 100 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:36,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1309 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 647 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-07-14 06:11:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-14 06:11:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-14 06:11:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-14 06:11:36,115 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 206 [2022-07-14 06:11:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:36,116 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 06:11:36,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.113636363636363) internal successors, (225), 45 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) [2022-07-14 06:11:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-14 06:11:36,116 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-14 06:11:36,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2022-07-14 06:11:36,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-07-14 06:11:36,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-07-14 06:11:36,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-07-14 06:11:36,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-07-14 06:11:36,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-07-14 06:11:36,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:36,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-14 06:11:36,343 INFO L356 BasicCegarLoop]: Path program histogram: [21, 9, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:36,344 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 06:11:36,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 06:11:36 BoogieIcfgContainer [2022-07-14 06:11:36,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 06:11:36,346 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 06:11:36,346 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 06:11:36,347 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 06:11:36,347 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:09:14" (3/4) ... [2022-07-14 06:11:36,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-14 06:11:36,355 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-14 06:11:36,355 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-14 06:11:36,355 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-14 06:11:36,355 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-14 06:11:36,386 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 06:11:36,386 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 06:11:36,386 INFO L158 Benchmark]: Toolchain (without parser) took 143269.38ms. Allocated memory was 94.4MB in the beginning and 461.4MB in the end (delta: 367.0MB). Free memory was 58.0MB in the beginning and 413.8MB in the end (delta: -355.8MB). Peak memory consumption was 9.4MB. Max. memory is 16.1GB. [2022-07-14 06:11:36,386 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 75.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:11:36,386 INFO L158 Benchmark]: CACSL2BoogieTranslator took 418.47ms. Allocated memory is still 94.4MB. Free memory was 57.8MB in the beginning and 64.3MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:11:36,387 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.43ms. Allocated memory is still 94.4MB. Free memory was 64.3MB in the beginning and 62.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:11:36,387 INFO L158 Benchmark]: Boogie Preprocessor took 33.72ms. Allocated memory is still 94.4MB. Free memory was 62.0MB in the beginning and 60.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:11:36,387 INFO L158 Benchmark]: RCFGBuilder took 390.13ms. Allocated memory is still 94.4MB. Free memory was 60.7MB in the beginning and 46.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-14 06:11:36,387 INFO L158 Benchmark]: TraceAbstraction took 142334.36ms. Allocated memory was 94.4MB in the beginning and 461.4MB in the end (delta: 367.0MB). Free memory was 46.3MB in the beginning and 416.9MB in the end (delta: -370.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:11:36,387 INFO L158 Benchmark]: Witness Printer took 39.69ms. Allocated memory is still 461.4MB. Free memory was 416.9MB in the beginning and 413.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:11:36,388 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 75.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 418.47ms. Allocated memory is still 94.4MB. Free memory was 57.8MB in the beginning and 64.3MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.43ms. Allocated memory is still 94.4MB. Free memory was 64.3MB in the beginning and 62.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.72ms. Allocated memory is still 94.4MB. Free memory was 62.0MB in the beginning and 60.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 390.13ms. Allocated memory is still 94.4MB. Free memory was 60.7MB in the beginning and 46.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 142334.36ms. Allocated memory was 94.4MB in the beginning and 461.4MB in the end (delta: 367.0MB). Free memory was 46.3MB in the beginning and 416.9MB in the end (delta: -370.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 39.69ms. Allocated memory is still 461.4MB. Free memory was 416.9MB in the beginning and 413.8MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 52 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 142.3s, OverallIterations: 61, TraceHistogramMax: 11, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.1s, AutomataDifference: 50.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19895 SdHoareTripleChecker+Valid, 16.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19895 mSDsluCounter, 59541 SdHoareTripleChecker+Invalid, 14.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 7857 IncrementalHoareTripleChecker+Unchecked, 56274 mSDsCounter, 2191 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48780 IncrementalHoareTripleChecker+Invalid, 58828 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2191 mSolverCounterUnsat, 3267 mSDtfsCounter, 48780 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11413 GetRequests, 8281 SyntacticMatches, 145 SemanticMatches, 2987 ConstructedPredicates, 9 IntricatePredicates, 36 DeprecatedPredicates, 67221 ImplicationChecksByTransitivity, 66.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=949occurred in iteration=60, InterpolantAutomatonStates: 1599, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 61 MinimizatonAttempts, 3874 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 7.5s SatisfiabilityAnalysisTime, 69.4s InterpolantComputationTime, 9494 NumberOfCodeBlocks, 9436 NumberOfCodeBlocksAsserted, 236 NumberOfCheckSat, 13938 ConstructedInterpolants, 1326 QuantifiedInterpolants, 171061 SizeOfPredicates, 714 NumberOfNonLiveVariables, 18571 ConjunctsInSsa, 2281 ConjunctsInUnsatCore, 146 InterpolantComputations, 19 PerfectInterpolantSequences, 18517/41645 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-14 06:11:36,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE