./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/loop-acceleration/array3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 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/loop-acceleration/array3.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 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 17:54:53,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:54:53,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:54:53,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:54:53,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:54:53,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:54:53,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:54:53,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:54:53,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:54:53,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:54:53,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:54:53,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:54:53,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:54:53,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:54:53,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:54:53,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:54:53,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:54:53,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:54:53,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:54:53,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:54:53,319 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:54:53,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:54:53,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:54:53,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:54:53,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:54:53,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:54:53,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:54:53,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:54:53,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:54:53,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:54:53,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:54:53,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:54:53,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:54:53,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:54:53,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:54:53,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:54:53,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:54:53,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:54:53,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:54:53,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:54:53,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:54:53,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:54:53,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:54:53,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:54:53,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:54:53,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:54:53,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:54:53,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:54:53,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:54:53,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:54:53,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:54:53,358 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:54:53,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:54:53,359 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:54:53,359 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:54:53,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:54:53,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:54:53,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:54:53,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:54:53,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:54:53,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:54:53,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:54:53,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:54:53,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:54:53,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:54:53,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:54:53,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:54:53,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea [2022-07-21 17:54:53,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:54:53,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:54:53,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:54:53,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:54:53,625 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:54:53,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array3.i [2022-07-21 17:54:53,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d80abdccd/a0962e67528e4c0e9338ebe652a25c3a/FLAGcbca9aa68 [2022-07-21 17:54:54,021 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:54:54,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i [2022-07-21 17:54:54,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d80abdccd/a0962e67528e4c0e9338ebe652a25c3a/FLAGcbca9aa68 [2022-07-21 17:54:54,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d80abdccd/a0962e67528e4c0e9338ebe652a25c3a [2022-07-21 17:54:54,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:54:54,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:54:54,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:54:54,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:54:54,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:54:54,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ffd583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54, skipping insertion in model container [2022-07-21 17:54:54,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:54:54,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:54:54,550 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2022-07-21 17:54:54,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:54:54,565 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:54:54,573 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i[846,859] [2022-07-21 17:54:54,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:54:54,602 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:54:54,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54 WrapperNode [2022-07-21 17:54:54,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:54:54,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:54:54,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:54:54,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:54:54,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,656 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-07-21 17:54:54,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:54:54,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:54:54,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:54:54,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:54:54,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:54:54,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:54:54,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:54:54,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:54:54,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (1/1) ... [2022-07-21 17:54:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:54:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:54,742 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) [2022-07-21 17:54:54,749 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 [2022-07-21 17:54:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 17:54:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 17:54:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:54:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:54:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:54:54,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:54:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:54:54,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:54:54,838 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:54:54,839 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:54:54,973 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:54:54,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:54:54,977 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 17:54:54,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:54:54 BoogieIcfgContainer [2022-07-21 17:54:54,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:54:54,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:54:54,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:54:54,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:54:54,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:54:54" (1/3) ... [2022-07-21 17:54:54,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45765fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:54:54, skipping insertion in model container [2022-07-21 17:54:54,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:54:54" (2/3) ... [2022-07-21 17:54:54,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45765fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:54:54, skipping insertion in model container [2022-07-21 17:54:54,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:54:54" (3/3) ... [2022-07-21 17:54:54,997 INFO L111 eAbstractionObserver]: Analyzing ICFG array3.i [2022-07-21 17:54:55,007 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:54:55,007 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-07-21 17:54:55,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:54:55,081 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@48a1e286, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1439bf7c [2022-07-21 17:54:55,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 17:54:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 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) [2022-07-21 17:54:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:54:55,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:55,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:54:55,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-21 17:54:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:55,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999353774] [2022-07-21 17:54:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:55,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999353774] [2022-07-21 17:54:55,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999353774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:54:55,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:54:55,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:54:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139251253] [2022-07-21 17:54:55,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:54:55,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:54:55,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:55,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:54:55,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:54:55,300 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 23 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:55,334 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-21 17:54:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:54:55,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-21 17:54:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:55,341 INFO L225 Difference]: With dead ends: 22 [2022-07-21 17:54:55,341 INFO L226 Difference]: Without dead ends: 20 [2022-07-21 17:54:55,343 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 [2022-07-21 17:54:55,345 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:55,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:54:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-21 17:54:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-21 17:54:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 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) [2022-07-21 17:54:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-21 17:54:55,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2022-07-21 17:54:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:55,366 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-21 17:54:55,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-21 17:54:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-21 17:54:55,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:55,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-21 17:54:55,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:54:55,368 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-21 17:54:55,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:55,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983940597] [2022-07-21 17:54:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:55,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:55,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983940597] [2022-07-21 17:54:55,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983940597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:54:55,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:54:55,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:54:55,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251206943] [2022-07-21 17:54:55,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:54:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:54:55,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:54:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:54:55,436 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:55,457 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-07-21 17:54:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:54:55,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-07-21 17:54:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:55,458 INFO L225 Difference]: With dead ends: 24 [2022-07-21 17:54:55,458 INFO L226 Difference]: Without dead ends: 24 [2022-07-21 17:54:55,458 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 [2022-07-21 17:54:55,459 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:55,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:54:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-21 17:54:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-07-21 17:54:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-21 17:54:55,463 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2022-07-21 17:54:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:55,463 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-21 17:54:55,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-21 17:54:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 17:54:55,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:55,464 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:54:55,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:54:55,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:55,465 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-21 17:54:55,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:55,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033877382] [2022-07-21 17:54:55,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:55,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:55,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:55,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033877382] [2022-07-21 17:54:55,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033877382] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:54:55,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491118734] [2022-07-21 17:54:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:55,544 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) [2022-07-21 17:54:55,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:54:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:54:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:54:55,645 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-21 17:54:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:55,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:54:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:55,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491118734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:54:55,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:54:55,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-07-21 17:54:55,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42647620] [2022-07-21 17:54:55,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:54:55,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:54:55,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:54:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:54:55,786 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 8 states have (on average 2.75) 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) [2022-07-21 17:54:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:55,915 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-07-21 17:54:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:54:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) 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 8 [2022-07-21 17:54:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:55,919 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:54:55,919 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:54:55,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:54:55,922 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:55,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 51 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:54:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:54:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2022-07-21 17:54:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-21 17:54:55,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 8 [2022-07-21 17:54:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:55,927 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-21 17:54:55,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) 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) [2022-07-21 17:54:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-21 17:54:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:54:55,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:55,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:54:55,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 17:54:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:56,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1096013292, now seen corresponding path program 1 times [2022-07-21 17:54:56,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:56,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255249836] [2022-07-21 17:54:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:54:56,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:56,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255249836] [2022-07-21 17:54:56,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255249836] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:54:56,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:54:56,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:54:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191715729] [2022-07-21 17:54:56,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:54:56,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:54:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:54:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:54:56,190 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:56,210 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-07-21 17:54:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:54:56,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-21 17:54:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:56,211 INFO L225 Difference]: With dead ends: 50 [2022-07-21 17:54:56,211 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 17:54:56,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:54:56,212 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:56,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:54:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 17:54:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-07-21 17:54:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-21 17:54:56,216 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 25 [2022-07-21 17:54:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:56,216 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-21 17:54:56,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-21 17:54:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:54:56,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:56,217 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:54:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:54:56,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -383321270, now seen corresponding path program 1 times [2022-07-21 17:54:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:56,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175120965] [2022-07-21 17:54:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:56,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175120965] [2022-07-21 17:54:56,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175120965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:54:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828537753] [2022-07-21 17:54:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:56,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:56,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:56,277 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) [2022-07-21 17:54:56,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:54:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:54:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:54:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:56,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:54:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:56,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828537753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:54:56,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:54:56,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-21 17:54:56,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998478698] [2022-07-21 17:54:56,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:54:56,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 17:54:56,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 17:54:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:54:56,425 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:56,522 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2022-07-21 17:54:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:54:56,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-21 17:54:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:56,523 INFO L225 Difference]: With dead ends: 169 [2022-07-21 17:54:56,523 INFO L226 Difference]: Without dead ends: 169 [2022-07-21 17:54:56,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-21 17:54:56,524 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 255 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:56,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 95 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:54:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-21 17:54:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 71. [2022-07-21 17:54:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 70 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) [2022-07-21 17:54:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-07-21 17:54:56,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 26 [2022-07-21 17:54:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:56,529 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-07-21 17:54:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-07-21 17:54:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 17:54:56,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:56,530 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:54:56,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 17:54:56,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:56,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2088511908, now seen corresponding path program 2 times [2022-07-21 17:54:56,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:56,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286946545] [2022-07-21 17:54:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:54:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286946545] [2022-07-21 17:54:56,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286946545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:54:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640950065] [2022-07-21 17:54:56,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:54:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:56,883 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) [2022-07-21 17:54:56,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:54:56,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:54:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:54:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:54:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:54:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-21 17:54:57,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:54:57,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640950065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:54:57,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:54:57,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-07-21 17:54:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977545420] [2022-07-21 17:54:57,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:54:57,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:54:57,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:54:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:54:57,094 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:57,094 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-07-21 17:54:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:54:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 50 [2022-07-21 17:54:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:57,095 INFO L225 Difference]: With dead ends: 70 [2022-07-21 17:54:57,095 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 17:54:57,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:54:57,096 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:57,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2022-07-21 17:54:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 17:54:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-21 17:54:57,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 1.078125) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:57,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-21 17:54:57,105 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 50 [2022-07-21 17:54:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:57,106 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-21 17:54:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:57,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-21 17:54:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:54:57,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:57,107 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:54:57,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:54:57,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:57,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash 122499825, now seen corresponding path program 1 times [2022-07-21 17:54:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:57,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330234410] [2022-07-21 17:54:57,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:57,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-21 17:54:57,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330234410] [2022-07-21 17:54:57,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330234410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:54:57,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028098752] [2022-07-21 17:54:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:57,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:57,392 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) [2022-07-21 17:54:57,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:54:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:57,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:54:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:54:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:54:57,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:54:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 17:54:57,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028098752] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:54:57,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:54:57,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 26 [2022-07-21 17:54:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075621335] [2022-07-21 17:54:57,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:54:57,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 17:54:57,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 17:54:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:54:57,747 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:58,185 INFO L93 Difference]: Finished difference Result 248 states and 249 transitions. [2022-07-21 17:54:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 17:54:58,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 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 53 [2022-07-21 17:54:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:54:58,188 INFO L225 Difference]: With dead ends: 248 [2022-07-21 17:54:58,188 INFO L226 Difference]: Without dead ends: 206 [2022-07-21 17:54:58,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=806, Invalid=1356, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 17:54:58,190 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 451 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:54:58,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 97 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:54:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-21 17:54:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2022-07-21 17:54:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.1135135135135135) internal successors, (206), 186 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2022-07-21 17:54:58,202 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 53 [2022-07-21 17:54:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:54:58,202 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2022-07-21 17:54:58,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 26 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:54:58,203 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2022-07-21 17:54:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-21 17:54:58,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:54:58,204 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 17:54:58,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:54:58,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:58,420 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:54:58,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:54:58,420 INFO L85 PathProgramCache]: Analyzing trace with hash -967423035, now seen corresponding path program 1 times [2022-07-21 17:54:58,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:54:58,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072649443] [2022-07-21 17:54:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:58,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:54:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:54:58,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:54:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072649443] [2022-07-21 17:54:58,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072649443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:54:58,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79562614] [2022-07-21 17:54:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:54:58,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:54:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:54:58,740 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) [2022-07-21 17:54:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:54:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:54:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 17:54:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:54:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:54:58,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:54:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:54:59,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79562614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:54:59,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:54:59,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-21 17:54:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731034689] [2022-07-21 17:54:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:54:59,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:54:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:54:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:54:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:54:59,562 INFO L87 Difference]: Start difference. First operand 187 states and 206 transitions. Second operand has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 49 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) [2022-07-21 17:54:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:54:59,997 INFO L93 Difference]: Finished difference Result 518 states and 519 transitions. [2022-07-21 17:54:59,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 17:54:59,998 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 49 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 109 [2022-07-21 17:54:59,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:00,000 INFO L225 Difference]: With dead ends: 518 [2022-07-21 17:55:00,000 INFO L226 Difference]: Without dead ends: 518 [2022-07-21 17:55:00,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:55:00,001 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 965 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:00,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 192 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:55:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-21 17:55:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 283. [2022-07-21 17:55:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 1.0747330960854093) internal successors, (302), 282 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 302 transitions. [2022-07-21 17:55:00,011 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 302 transitions. Word has length 109 [2022-07-21 17:55:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:00,012 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 302 transitions. [2022-07-21 17:55:00,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 49 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) [2022-07-21 17:55:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 302 transitions. [2022-07-21 17:55:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-21 17:55:00,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:00,014 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 17:55:00,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:00,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:55:00,234 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:55:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 922349181, now seen corresponding path program 2 times [2022-07-21 17:55:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:55:00,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86262201] [2022-07-21 17:55:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:00,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:55:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:55:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:55:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86262201] [2022-07-21 17:55:01,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86262201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:55:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615933114] [2022-07-21 17:55:01,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:55:01,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:55:01,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:55:01,276 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) [2022-07-21 17:55:01,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:55:01,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:55:01,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:55:01,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 17:55:01,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:55:01,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:55:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:55:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615933114] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:55:03,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:55:03,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-21 17:55:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717770244] [2022-07-21 17:55:03,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:55:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-21 17:55:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:55:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-21 17:55:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-21 17:55:03,799 INFO L87 Difference]: Start difference. First operand 283 states and 302 transitions. Second operand has 97 states, 97 states have (on average 3.9587628865979383) internal successors, (384), 97 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:05,818 INFO L93 Difference]: Finished difference Result 1142 states and 1143 transitions. [2022-07-21 17:55:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-21 17:55:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9587628865979383) internal successors, (384), 97 states have internal predecessors, (384), 0 states have call successors, (0), 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 205 [2022-07-21 17:55:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:05,822 INFO L225 Difference]: With dead ends: 1142 [2022-07-21 17:55:05,822 INFO L226 Difference]: Without dead ends: 1142 [2022-07-21 17:55:05,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-21 17:55:05,825 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2968 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2968 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:05,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2968 Valid, 419 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 17:55:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-07-21 17:55:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 475. [2022-07-21 17:55:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.0443974630021142) internal successors, (494), 474 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 494 transitions. [2022-07-21 17:55:05,834 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 494 transitions. Word has length 205 [2022-07-21 17:55:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:05,834 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 494 transitions. [2022-07-21 17:55:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9587628865979383) internal successors, (384), 97 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 494 transitions. [2022-07-21 17:55:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-07-21 17:55:05,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:05,838 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-21 17:55:05,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:06,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:55:06,056 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:55:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash 327242733, now seen corresponding path program 3 times [2022-07-21 17:55:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:55:06,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261529080] [2022-07-21 17:55:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:55:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17606 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 17:55:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:55:09,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261529080] [2022-07-21 17:55:09,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261529080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:55:09,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782000785] [2022-07-21 17:55:09,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:55:09,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:55:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:55:09,355 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) [2022-07-21 17:55:09,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:55:09,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:55:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:55:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:55:09,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:55:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17606 backedges. 280 proven. 28 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2022-07-21 17:55:09,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:55:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17606 backedges. 280 proven. 28 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2022-07-21 17:55:10,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782000785] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:55:10,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:55:10,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 10, 10] total 115 [2022-07-21 17:55:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581673607] [2022-07-21 17:55:10,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:55:10,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-07-21 17:55:10,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:55:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-07-21 17:55:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5543, Invalid=7567, Unknown=0, NotChecked=0, Total=13110 [2022-07-21 17:55:10,420 INFO L87 Difference]: Start difference. First operand 475 states and 494 transitions. Second operand has 115 states, 115 states have (on average 3.773913043478261) internal successors, (434), 115 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:19,480 INFO L93 Difference]: Finished difference Result 1124 states and 1130 transitions. [2022-07-21 17:55:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-21 17:55:19,481 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 3.773913043478261) internal successors, (434), 115 states have internal predecessors, (434), 0 states have call successors, (0), 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 397 [2022-07-21 17:55:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:19,484 INFO L225 Difference]: With dead ends: 1124 [2022-07-21 17:55:19,491 INFO L226 Difference]: Without dead ends: 1124 [2022-07-21 17:55:19,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8630 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=16782, Invalid=30090, Unknown=0, NotChecked=0, Total=46872 [2022-07-21 17:55:19,497 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7689 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 1435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7689 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1435 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:19,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7689 Valid, 462 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1435 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 17:55:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-07-21 17:55:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 790. [2022-07-21 17:55:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 788 states have (on average 1.101522842639594) internal successors, (868), 789 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 868 transitions. [2022-07-21 17:55:19,522 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 868 transitions. Word has length 397 [2022-07-21 17:55:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:19,522 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 868 transitions. [2022-07-21 17:55:19,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 3.773913043478261) internal successors, (434), 115 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 868 transitions. [2022-07-21 17:55:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-07-21 17:55:19,527 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:19,528 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:55:19,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:55:19,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:55:19,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:55:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash 771095157, now seen corresponding path program 2 times [2022-07-21 17:55:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:55:19,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321027877] [2022-07-21 17:55:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:55:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18923 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 18858 trivial. 0 not checked. [2022-07-21 17:55:19,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:55:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321027877] [2022-07-21 17:55:19,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321027877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:55:19,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:55:19,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 17:55:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370902838] [2022-07-21 17:55:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:55:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:55:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:55:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:55:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:55:19,924 INFO L87 Difference]: Start difference. First operand 790 states and 868 transitions. Second operand has 5 states, 5 states have (on average 3.8) 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) [2022-07-21 17:55:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:55:19,941 INFO L93 Difference]: Finished difference Result 788 states and 866 transitions. [2022-07-21 17:55:19,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:55:19,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) 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 477 [2022-07-21 17:55:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:55:19,944 INFO L225 Difference]: With dead ends: 788 [2022-07-21 17:55:19,944 INFO L226 Difference]: Without dead ends: 786 [2022-07-21 17:55:19,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:55:19,945 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:55:19,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 16 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:55:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-07-21 17:55:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-07-21 17:55:19,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 1.002547770700637) internal successors, (787), 785 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 17:55:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 787 transitions. [2022-07-21 17:55:19,955 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 787 transitions. Word has length 477 [2022-07-21 17:55:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:55:19,956 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 787 transitions. [2022-07-21 17:55:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) 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) [2022-07-21 17:55:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 787 transitions. [2022-07-21 17:55:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-07-21 17:55:19,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:55:19,973 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 100, 95, 95, 95, 95, 1, 1, 1, 1, 1] [2022-07-21 17:55:19,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 17:55:19,973 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2022-07-21 17:55:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:55:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 808802154, now seen corresponding path program 4 times [2022-07-21 17:55:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:55:19,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765837181] [2022-07-21 17:55:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:55:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:55:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:55:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 37855 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2022-07-21 17:55:22,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:55:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765837181] [2022-07-21 17:55:22,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765837181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:55:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942207269] [2022-07-21 17:55:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:55:22,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:55:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:55:22,458 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) [2022-07-21 17:55:22,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process