./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 eb692b52 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-?-eb692b5 [2022-07-20 06:31:08,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:31:08,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:31:08,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:31:08,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:31:08,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:31:08,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:31:08,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:31:08,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:31:08,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:31:08,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:31:08,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:31:08,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:31:08,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:31:08,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:31:08,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:31:08,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:31:08,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:31:08,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:31:08,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:31:08,849 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:31:08,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:31:08,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:31:08,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:31:08,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:31:08,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:31:08,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:31:08,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:31:08,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:31:08,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:31:08,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:31:08,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:31:08,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:31:08,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:31:08,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:31:08,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:31:08,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:31:08,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:31:08,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:31:08,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:31:08,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:31:08,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:31:08,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:31:08,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:31:08,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:31:08,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:31:08,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:31:08,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:31:08,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:31:08,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:31:08,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:31:08,908 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:31:08,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:31:08,909 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:31:08,909 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:31:08,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:31:08,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:31:08,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:31:08,910 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:31:08,910 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:31:08,910 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:31:08,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:31:08,910 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:31:08,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:31:08,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:31:08,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:31:08,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:31:08,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:31:08,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:31:08,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:31:08,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:31:08,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:31:08,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:31:08,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9dfb76d38495bc50f893b9a1fbc1c4079ae42ab458f1c235795d8ebc0da579ea [2022-07-20 06:31:09,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:31:09,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:31:09,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:31:09,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:31:09,185 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:31:09,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array3.i [2022-07-20 06:31:09,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281762625/d718837ae16c4052b6e66e05a48db132/FLAGfea5202e2 [2022-07-20 06:31:09,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:31:09,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array3.i [2022-07-20 06:31:09,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281762625/d718837ae16c4052b6e66e05a48db132/FLAGfea5202e2 [2022-07-20 06:31:10,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281762625/d718837ae16c4052b6e66e05a48db132 [2022-07-20 06:31:10,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:31:10,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:31:10,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:31:10,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:31:10,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:31:10,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d3e3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10, skipping insertion in model container [2022-07-20 06:31:10,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:31:10,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:31:10,294 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] [2022-07-20 06:31:10,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:31:10,312 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:31:10,323 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] [2022-07-20 06:31:10,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:31:10,345 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:31:10,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10 WrapperNode [2022-07-20 06:31:10,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:31:10,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:31:10,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:31:10,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:31:10,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,378 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-07-20 06:31:10,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:31:10,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:31:10,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:31:10,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:31:10,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:31:10,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:31:10,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:31:10,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:31:10,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (1/1) ... [2022-07-20 06:31:10,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:31:10,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:10,459 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) [2022-07-20 06:31:10,461 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 [2022-07-20 06:31:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:31:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:31:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:31:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:31:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:31:10,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:31:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:31:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:31:10,560 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:31:10,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:31:10,734 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:31:10,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:31:10,755 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 06:31:10,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:31:10 BoogieIcfgContainer [2022-07-20 06:31:10,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:31:10,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:31:10,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:31:10,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:31:10,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:31:10" (1/3) ... [2022-07-20 06:31:10,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c216f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:31:10, skipping insertion in model container [2022-07-20 06:31:10,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:31:10" (2/3) ... [2022-07-20 06:31:10,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c216f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:31:10, skipping insertion in model container [2022-07-20 06:31:10,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:31:10" (3/3) ... [2022-07-20 06:31:10,766 INFO L111 eAbstractionObserver]: Analyzing ICFG array3.i [2022-07-20 06:31:10,778 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:31:10,779 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-07-20 06:31:10,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:31:10,850 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@816c18f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4849b9d7 [2022-07-20 06:31:10,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-20 06:31:10,854 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) [2022-07-20 06:31:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:31:10,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:10,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:31:10,859 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)] === [2022-07-20 06:31:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-20 06:31:10,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:10,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532179843] [2022-07-20 06:31:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:10,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:11,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532179843] [2022-07-20 06:31:11,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532179843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:31:11,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:31:11,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:31:11,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607399656] [2022-07-20 06:31:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:31:11,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:31:11,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:31:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:31:11,093 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) [2022-07-20 06:31:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:11,131 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-07-20 06:31:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:31:11,135 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 [2022-07-20 06:31:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:11,141 INFO L225 Difference]: With dead ends: 22 [2022-07-20 06:31:11,141 INFO L226 Difference]: Without dead ends: 20 [2022-07-20 06:31:11,143 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 [2022-07-20 06:31:11,151 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 [2022-07-20 06:31:11,152 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] [2022-07-20 06:31:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-20 06:31:11,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-20 06:31:11,183 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) [2022-07-20 06:31:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-07-20 06:31:11,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 4 [2022-07-20 06:31:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-07-20 06:31:11,186 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) [2022-07-20 06:31:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-07-20 06:31:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 06:31:11,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:11,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 06:31:11,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:31:11,188 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)] === [2022-07-20 06:31:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-20 06:31:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:11,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580239714] [2022-07-20 06:31:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:11,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:11,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580239714] [2022-07-20 06:31:11,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580239714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:31:11,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:31:11,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:31:11,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598228993] [2022-07-20 06:31:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:31:11,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:31:11,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:31:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:31:11,284 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) [2022-07-20 06:31:11,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:11,328 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-07-20 06:31:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:31:11,329 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 [2022-07-20 06:31:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:11,330 INFO L225 Difference]: With dead ends: 24 [2022-07-20 06:31:11,330 INFO L226 Difference]: Without dead ends: 24 [2022-07-20 06:31:11,333 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 [2022-07-20 06:31:11,335 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 [2022-07-20 06:31:11,336 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] [2022-07-20 06:31:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-20 06:31:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-07-20 06:31:11,344 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) [2022-07-20 06:31:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-20 06:31:11,345 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 4 [2022-07-20 06:31:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:11,346 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-20 06:31:11,347 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) [2022-07-20 06:31:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-20 06:31:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 06:31:11,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:11,350 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-20 06:31:11,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:31:11,351 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)] === [2022-07-20 06:31:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:11,360 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-20 06:31:11,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:11,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628680007] [2022-07-20 06:31:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:11,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:11,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628680007] [2022-07-20 06:31:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628680007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:11,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994651003] [2022-07-20 06:31:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:11,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:11,467 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) [2022-07-20 06:31:11,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:31:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 06:31:11,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:11,614 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 [2022-07-20 06:31:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:11,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:31:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:11,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994651003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:31:11,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:31:11,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-07-20 06:31:11,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072963121] [2022-07-20 06:31:11,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:31:11,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:31:11,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:31:11,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:31:11,766 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) [2022-07-20 06:31:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:11,902 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-07-20 06:31:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:31:11,903 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 [2022-07-20 06:31:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:11,905 INFO L225 Difference]: With dead ends: 60 [2022-07-20 06:31:11,905 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 06:31:11,906 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 [2022-07-20 06:31:11,909 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 [2022-07-20 06:31:11,910 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] [2022-07-20 06:31:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 06:31:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2022-07-20 06:31:11,920 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) [2022-07-20 06:31:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-20 06:31:11,922 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 8 [2022-07-20 06:31:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:11,922 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-20 06:31:11,922 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) [2022-07-20 06:31:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-20 06:31:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 06:31:11,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:11,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:31:11,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:12,149 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 [2022-07-20 06:31:12,150 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)] === [2022-07-20 06:31:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:12,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1096013292, now seen corresponding path program 1 times [2022-07-20 06:31:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:12,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737009804] [2022-07-20 06:31:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737009804] [2022-07-20 06:31:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737009804] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:31:12,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:31:12,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:31:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915828285] [2022-07-20 06:31:12,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:31:12,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:31:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:12,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:31:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:31:12,226 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) [2022-07-20 06:31:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:12,251 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-07-20 06:31:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:31:12,252 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 [2022-07-20 06:31:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:12,252 INFO L225 Difference]: With dead ends: 50 [2022-07-20 06:31:12,253 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 06:31:12,253 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 [2022-07-20 06:31:12,254 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 [2022-07-20 06:31:12,254 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] [2022-07-20 06:31:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 06:31:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-07-20 06:31:12,258 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) [2022-07-20 06:31:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-20 06:31:12,259 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 25 [2022-07-20 06:31:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:12,259 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-20 06:31:12,260 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) [2022-07-20 06:31:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-20 06:31:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:31:12,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:12,261 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:31:12,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:31:12,261 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)] === [2022-07-20 06:31:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash -383321270, now seen corresponding path program 1 times [2022-07-20 06:31:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242577264] [2022-07-20 06:31:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242577264] [2022-07-20 06:31:12,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242577264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34769525] [2022-07-20 06:31:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:12,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:12,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:12,325 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) [2022-07-20 06:31:12,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:31:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 06:31:12,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:12,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:31:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:12,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34769525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:31:12,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:31:12,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-20 06:31:12,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566068821] [2022-07-20 06:31:12,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:31:12,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 06:31:12,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 06:31:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 06:31:12,486 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) [2022-07-20 06:31:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:12,612 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2022-07-20 06:31:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 06:31:12,612 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 [2022-07-20 06:31:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:12,614 INFO L225 Difference]: With dead ends: 169 [2022-07-20 06:31:12,614 INFO L226 Difference]: Without dead ends: 169 [2022-07-20 06:31:12,614 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 [2022-07-20 06:31:12,615 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 [2022-07-20 06:31:12,615 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] [2022-07-20 06:31:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-20 06:31:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 71. [2022-07-20 06:31:12,622 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) [2022-07-20 06:31:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-07-20 06:31:12,623 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 26 [2022-07-20 06:31:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:12,623 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-07-20 06:31:12,623 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) [2022-07-20 06:31:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-07-20 06:31:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 06:31:12,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:12,625 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:31:12,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:12,851 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 [2022-07-20 06:31:12,852 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)] === [2022-07-20 06:31:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2088511908, now seen corresponding path program 2 times [2022-07-20 06:31:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874582163] [2022-07-20 06:31:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:31:13,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874582163] [2022-07-20 06:31:13,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874582163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625195026] [2022-07-20 06:31:13,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:31:13,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:13,028 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) [2022-07-20 06:31:13,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:31:13,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 06:31:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:31:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 06:31:13,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-20 06:31:13,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:31:13,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625195026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:31:13,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:31:13,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-07-20 06:31:13,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37047686] [2022-07-20 06:31:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:31:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:31:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:31:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2022-07-20 06:31:13,367 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) [2022-07-20 06:31:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:13,369 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-07-20 06:31:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:31:13,369 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 [2022-07-20 06:31:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:13,370 INFO L225 Difference]: With dead ends: 70 [2022-07-20 06:31:13,370 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 06:31:13,370 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 [2022-07-20 06:31:13,371 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 [2022-07-20 06:31:13,372 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] [2022-07-20 06:31:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 06:31:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-20 06:31:13,375 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) [2022-07-20 06:31:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-20 06:31:13,376 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 50 [2022-07-20 06:31:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:13,377 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-20 06:31:13,377 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) [2022-07-20 06:31:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-20 06:31:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 06:31:13,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:13,378 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:31:13,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:13,600 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 [2022-07-20 06:31:13,601 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)] === [2022-07-20 06:31:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:13,601 INFO L85 PathProgramCache]: Analyzing trace with hash 122499825, now seen corresponding path program 1 times [2022-07-20 06:31:13,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:13,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330848482] [2022-07-20 06:31:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:13,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-20 06:31:13,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:13,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330848482] [2022-07-20 06:31:13,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330848482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:13,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621281386] [2022-07-20 06:31:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:13,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:13,673 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) [2022-07-20 06:31:13,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:31:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 06:31:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:31:13,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:31:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 06:31:14,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621281386] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:31:14,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:31:14,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 26 [2022-07-20 06:31:14,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827125574] [2022-07-20 06:31:14,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:31:14,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 06:31:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 06:31:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-20 06:31:14,147 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) [2022-07-20 06:31:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:14,674 INFO L93 Difference]: Finished difference Result 248 states and 249 transitions. [2022-07-20 06:31:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 06:31:14,675 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 [2022-07-20 06:31:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:14,676 INFO L225 Difference]: With dead ends: 248 [2022-07-20 06:31:14,676 INFO L226 Difference]: Without dead ends: 206 [2022-07-20 06:31:14,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=806, Invalid=1356, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 06:31:14,677 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 451 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-20 06:31:14,677 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] [2022-07-20 06:31:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-20 06:31:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2022-07-20 06:31:14,685 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) [2022-07-20 06:31:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2022-07-20 06:31:14,687 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 53 [2022-07-20 06:31:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:14,687 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2022-07-20 06:31:14,687 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) [2022-07-20 06:31:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2022-07-20 06:31:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 06:31:14,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:14,689 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-20 06:31:14,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:14,902 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 [2022-07-20 06:31:14,902 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)] === [2022-07-20 06:31:14,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:14,903 INFO L85 PathProgramCache]: Analyzing trace with hash -967423035, now seen corresponding path program 1 times [2022-07-20 06:31:14,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:14,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113222092] [2022-07-20 06:31:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:14,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:15,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113222092] [2022-07-20 06:31:15,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113222092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:15,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530578515] [2022-07-20 06:31:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:15,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:15,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:15,328 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) [2022-07-20 06:31:15,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:31:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 06:31:15,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:15,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:31:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 974 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:16,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530578515] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:31:16,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:31:16,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-20 06:31:16,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626874597] [2022-07-20 06:31:16,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:31:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 06:31:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 06:31:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 06:31:16,314 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) [2022-07-20 06:31:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:16,866 INFO L93 Difference]: Finished difference Result 518 states and 519 transitions. [2022-07-20 06:31:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-20 06:31:16,866 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 [2022-07-20 06:31:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:16,868 INFO L225 Difference]: With dead ends: 518 [2022-07-20 06:31:16,868 INFO L226 Difference]: Without dead ends: 518 [2022-07-20 06:31:16,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 06:31:16,870 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 965 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:31:16,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 192 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 06:31:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-20 06:31:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 283. [2022-07-20 06:31:16,881 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) [2022-07-20 06:31:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 302 transitions. [2022-07-20 06:31:16,883 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 302 transitions. Word has length 109 [2022-07-20 06:31:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:16,884 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 302 transitions. [2022-07-20 06:31:16,884 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) [2022-07-20 06:31:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 302 transitions. [2022-07-20 06:31:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-20 06:31:16,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:16,886 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-20 06:31:16,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:17,091 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 [2022-07-20 06:31:17,091 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)] === [2022-07-20 06:31:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 922349181, now seen corresponding path program 2 times [2022-07-20 06:31:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065814399] [2022-07-20 06:31:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:18,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065814399] [2022-07-20 06:31:18,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065814399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:18,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300509299] [2022-07-20 06:31:18,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 06:31:18,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:18,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:18,180 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) [2022-07-20 06:31:18,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:31:18,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 06:31:18,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:31:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 06:31:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:18,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:31:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:21,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300509299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:31:21,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:31:21,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-20 06:31:21,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901990507] [2022-07-20 06:31:21,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:31:21,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-20 06:31:21,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:21,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-20 06:31:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 06:31:21,102 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) [2022-07-20 06:31:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:23,423 INFO L93 Difference]: Finished difference Result 1142 states and 1143 transitions. [2022-07-20 06:31:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-20 06:31:23,424 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 [2022-07-20 06:31:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:23,428 INFO L225 Difference]: With dead ends: 1142 [2022-07-20 06:31:23,428 INFO L226 Difference]: Without dead ends: 1142 [2022-07-20 06:31:23,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 06:31:23,431 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2968 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 06:31:23,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2968 Valid, 419 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 06:31:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-07-20 06:31:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 475. [2022-07-20 06:31:23,446 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) [2022-07-20 06:31:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 494 transitions. [2022-07-20 06:31:23,450 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 494 transitions. Word has length 205 [2022-07-20 06:31:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:23,450 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 494 transitions. [2022-07-20 06:31:23,451 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) [2022-07-20 06:31:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 494 transitions. [2022-07-20 06:31:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-07-20 06:31:23,455 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:23,456 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-07-20 06:31:23,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:23,679 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 [2022-07-20 06:31:23,680 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)] === [2022-07-20 06:31:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash 327242733, now seen corresponding path program 3 times [2022-07-20 06:31:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570317337] [2022-07-20 06:31:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:23,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17606 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-20 06:31:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:27,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570317337] [2022-07-20 06:31:27,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570317337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:27,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275238875] [2022-07-20 06:31:27,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 06:31:27,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:27,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:27,152 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) [2022-07-20 06:31:27,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:31:27,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 06:31:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 06:31:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 06:31:27,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:31:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17606 backedges. 280 proven. 28 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2022-07-20 06:31:27,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:31:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17606 backedges. 280 proven. 28 refuted. 0 times theorem prover too weak. 17298 trivial. 0 not checked. [2022-07-20 06:31:28,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275238875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:31:28,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:31:28,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 10, 10] total 115 [2022-07-20 06:31:28,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536230634] [2022-07-20 06:31:28,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:31:28,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-07-20 06:31:28,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:28,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-07-20 06:31:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5543, Invalid=7567, Unknown=0, NotChecked=0, Total=13110 [2022-07-20 06:31:28,406 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) [2022-07-20 06:31:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:39,928 INFO L93 Difference]: Finished difference Result 1124 states and 1130 transitions. [2022-07-20 06:31:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-20 06:31:39,929 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 [2022-07-20 06:31:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:39,933 INFO L225 Difference]: With dead ends: 1124 [2022-07-20 06:31:39,933 INFO L226 Difference]: Without dead ends: 1124 [2022-07-20 06:31:39,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8630 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=16782, Invalid=30090, Unknown=0, NotChecked=0, Total=46872 [2022-07-20 06:31:39,955 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7689 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 1435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:31:39,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7689 Valid, 462 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1435 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 06:31:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-07-20 06:31:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 790. [2022-07-20 06:31:39,969 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) [2022-07-20 06:31:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 868 transitions. [2022-07-20 06:31:39,973 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 868 transitions. Word has length 397 [2022-07-20 06:31:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:39,974 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 868 transitions. [2022-07-20 06:31:39,974 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) [2022-07-20 06:31:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 868 transitions. [2022-07-20 06:31:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-07-20 06:31:39,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:39,982 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:31:40,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:31:40,207 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 [2022-07-20 06:31:40,207 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)] === [2022-07-20 06:31:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 771095157, now seen corresponding path program 2 times [2022-07-20 06:31:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602496855] [2022-07-20 06:31:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18923 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 18858 trivial. 0 not checked. [2022-07-20 06:31:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:40,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602496855] [2022-07-20 06:31:40,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602496855] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:31:40,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:31:40,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:31:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672225920] [2022-07-20 06:31:40,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:31:40,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:31:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:31:40,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:31:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:31:40,411 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) [2022-07-20 06:31:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:31:40,433 INFO L93 Difference]: Finished difference Result 788 states and 866 transitions. [2022-07-20 06:31:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:31:40,433 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 [2022-07-20 06:31:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:31:40,436 INFO L225 Difference]: With dead ends: 788 [2022-07-20 06:31:40,436 INFO L226 Difference]: Without dead ends: 786 [2022-07-20 06:31:40,437 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 [2022-07-20 06:31:40,438 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 [2022-07-20 06:31:40,438 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] [2022-07-20 06:31:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-07-20 06:31:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-07-20 06:31:40,448 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) [2022-07-20 06:31:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 787 transitions. [2022-07-20 06:31:40,450 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 787 transitions. Word has length 477 [2022-07-20 06:31:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:31:40,452 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 787 transitions. [2022-07-20 06:31:40,452 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) [2022-07-20 06:31:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 787 transitions. [2022-07-20 06:31:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2022-07-20 06:31:40,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:31:40,470 INFO L195 NwaCegarLoop]: trace histogram [100, 100, 100, 100, 95, 95, 95, 95, 1, 1, 1, 1, 1] [2022-07-20 06:31:40,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 06:31:40,471 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)] === [2022-07-20 06:31:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:31:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash 808802154, now seen corresponding path program 4 times [2022-07-20 06:31:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:31:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104373285] [2022-07-20 06:31:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:31:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:31:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:31:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 37855 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2022-07-20 06:31:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:31:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104373285] [2022-07-20 06:31:43,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104373285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:31:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539461374] [2022-07-20 06:31:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 06:31:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:31:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:31:43,872 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) [2022-07-20 06:31:43,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process