./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/list-ext-properties/960521-1_1-1.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 978f701fee046cd9a3f43bfb12d114d1876d2f10 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:47:28,852 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:47:28,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:47:28,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:47:28,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:47:28,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:47:28,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:47:28,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:47:28,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:47:28,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:47:28,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:47:28,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:47:28,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:47:28,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:47:28,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:47:28,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:47:28,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:47:28,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:47:28,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:47:28,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:47:28,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:47:28,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:47:28,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:47:28,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:47:28,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:47:28,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:47:28,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:47:28,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:47:28,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:47:28,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:47:28,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:47:28,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:47:28,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:47:28,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:47:28,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:47:28,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:47:28,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:47:28,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:47:28,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:47:28,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:47:28,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:47:28,953 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:47:28,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:47:28,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:47:28,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:47:28,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:47:28,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:47:28,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:47:29,000 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:47:29,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:47:29,000 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:47:29,000 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:47:29,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:47:29,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:47:29,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:47:29,002 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:47:29,002 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:47:29,002 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:47:29,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:47:29,002 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:47:29,002 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:47:29,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:47:29,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:47:29,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:47:29,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:47:29,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:47:29,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:47:29,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:47:29,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:47:29,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:47:29,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:47:29,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 978f701fee046cd9a3f43bfb12d114d1876d2f10 [2021-08-27 05:47:29,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:47:29,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:47:29,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:47:29,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:47:29,299 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:47:29,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-08-27 05:47:29,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4786ba2c8/f91f07443ce54254b7ce989ac706c9ee/FLAG50c2e5dc9 [2021-08-27 05:47:29,814 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:47:29,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-08-27 05:47:29,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4786ba2c8/f91f07443ce54254b7ce989ac706c9ee/FLAG50c2e5dc9 [2021-08-27 05:47:30,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4786ba2c8/f91f07443ce54254b7ce989ac706c9ee [2021-08-27 05:47:30,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:47:30,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:47:30,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:47:30,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:47:30,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:47:30,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc9236a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30, skipping insertion in model container [2021-08-27 05:47:30,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:47:30,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:47:30,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:47:30,496 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:47:30,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:47:30,574 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:47:30,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30 WrapperNode [2021-08-27 05:47:30,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:47:30,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:47:30,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:47:30,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:47:30,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:47:30,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:47:30,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:47:30,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:47:30,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (1/1) ... [2021-08-27 05:47:30,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:47:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:47:30,690 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) [2021-08-27 05:47:30,716 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 [2021-08-27 05:47:30,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:47:30,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:47:30,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:47:30,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:47:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:47:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:47:30,733 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:47:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:47:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-27 05:47:30,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:47:30,734 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:47:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:47:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:47:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:47:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:47:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:47:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:47:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:47:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:47:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:47:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:47:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:47:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:47:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:47:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:47:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:47:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:47:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:47:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:47:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:47:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:47:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:47:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:47:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:47:30,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:47:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:47:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:47:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:47:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:47:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:47:30,740 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:47:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:47:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:47:30,741 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:47:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:47:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:47:30,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:47:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:47:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:47:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:47:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:47:30,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:47:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:47:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:47:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:47:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:47:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:47:30,744 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:47:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:47:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:47:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:47:30,745 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:47:30,746 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:47:30,746 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:47:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:47:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:47:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:47:30,747 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:47:30,748 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:47:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:47:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:47:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:47:30,749 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:47:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:47:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:47:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:47:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:47:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:47:30,750 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:47:30,751 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:47:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:47:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:47:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:47:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:47:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:47:30,752 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:47:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:47:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:47:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:47:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:47:30,753 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:47:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:47:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:47:30,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:47:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:47:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:47:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:47:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:47:30,755 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:47:30,756 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-27 05:47:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:47:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:47:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:47:30,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:47:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:47:30,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:47:30,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:47:30,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:47:31,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:47:31,429 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 05:47:31,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:47:31 BoogieIcfgContainer [2021-08-27 05:47:31,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:47:31,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:47:31,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:47:31,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:47:31,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:47:30" (1/3) ... [2021-08-27 05:47:31,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5867ee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:47:31, skipping insertion in model container [2021-08-27 05:47:31,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:47:30" (2/3) ... [2021-08-27 05:47:31,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5867ee37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:47:31, skipping insertion in model container [2021-08-27 05:47:31,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:47:31" (3/3) ... [2021-08-27 05:47:31,446 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-08-27 05:47:31,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:47:31,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-08-27 05:47:31,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:47:31,504 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 05:47:31,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-08-27 05:47:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:47:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 05:47:31,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:31,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:31,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-08-27 05:47:31,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:31,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254618689] [2021-08-27 05:47:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:31,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:31,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:31,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:31,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254618689] [2021-08-27 05:47:31,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254618689] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:31,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:47:31,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:47:31,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322899689] [2021-08-27 05:47:31,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:47:31,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:47:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:47:31,822 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:31,966 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-27 05:47:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:47:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 05:47:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:31,973 INFO L225 Difference]: With dead ends: 62 [2021-08-27 05:47:31,973 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 05:47:31,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:47:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 05:47:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 05:47:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-27 05:47:32,005 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-08-27 05:47:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:32,006 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-27 05:47:32,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-27 05:47:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:47:32,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:32,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:32,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:47:32,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-08-27 05:47:32,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:32,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408695793] [2021-08-27 05:47:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:32,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:32,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:32,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408695793] [2021-08-27 05:47:32,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408695793] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:32,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:47:32,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:47:32,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701897831] [2021-08-27 05:47:32,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:47:32,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:47:32,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:47:32,127 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:32,331 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-08-27 05:47:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:47:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 05:47:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:32,340 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:47:32,340 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:47:32,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:47:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:47:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-08-27 05:47:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-08-27 05:47:32,360 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-08-27 05:47:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:32,360 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-08-27 05:47:32,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-08-27 05:47:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:47:32,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:32,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:32,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:47:32,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-08-27 05:47:32,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:32,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648933675] [2021-08-27 05:47:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:32,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:32,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:32,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648933675] [2021-08-27 05:47:32,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648933675] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:32,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:47:32,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:47:32,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932591167] [2021-08-27 05:47:32,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:47:32,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:32,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:47:32,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:47:32,477 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:32,581 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-27 05:47:32,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:47:32,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 05:47:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:32,583 INFO L225 Difference]: With dead ends: 62 [2021-08-27 05:47:32,583 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 05:47:32,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:47:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 05:47:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 05:47:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-08-27 05:47:32,587 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-08-27 05:47:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:32,588 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-08-27 05:47:32,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-08-27 05:47:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 05:47:32,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:32,589 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:32,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:47:32,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:32,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:32,590 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-08-27 05:47:32,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:32,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106624074] [2021-08-27 05:47:32,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:32,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:32,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:32,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106624074] [2021-08-27 05:47:32,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106624074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:47:32,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763439742] [2021-08-27 05:47:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:32,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:47:32,681 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) [2021-08-27 05:47:32,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 05:47:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 05:47:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:47:32,952 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:47:32,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-08-27 05:47:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:32,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763439742] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:32,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:47:32,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-08-27 05:47:32,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050116300] [2021-08-27 05:47:32,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:47:32,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:47:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:47:32,993 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:33,068 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-08-27 05:47:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:47:33,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-27 05:47:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:33,070 INFO L225 Difference]: With dead ends: 108 [2021-08-27 05:47:33,070 INFO L226 Difference]: Without dead ends: 108 [2021-08-27 05:47:33,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:47:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-27 05:47:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-08-27 05:47:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-27 05:47:33,074 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-08-27 05:47:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:33,075 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-27 05:47:33,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-27 05:47:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 05:47:33,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:33,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:33,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:47:33,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:33,290 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-08-27 05:47:33,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:33,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278945776] [2021-08-27 05:47:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:33,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:33,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:33,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:33,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278945776] [2021-08-27 05:47:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278945776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:33,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:47:33,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:47:33,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619526508] [2021-08-27 05:47:33,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:47:33,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:47:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:47:33,375 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:33,500 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-08-27 05:47:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:47:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 05:47:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:33,502 INFO L225 Difference]: With dead ends: 54 [2021-08-27 05:47:33,502 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 05:47:33,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:47:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 05:47:33,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-27 05:47:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-27 05:47:33,505 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-08-27 05:47:33,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:33,506 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-27 05:47:33,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-27 05:47:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 05:47:33,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:33,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:33,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:47:33,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-08-27 05:47:33,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:33,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443575392] [2021-08-27 05:47:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:33,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:33,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:33,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:33,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443575392] [2021-08-27 05:47:33,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443575392] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:33,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:47:33,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:47:33,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962679646] [2021-08-27 05:47:33,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:47:33,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:47:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:47:33,631 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:33,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:33,924 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-08-27 05:47:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:47:33,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 05:47:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:33,925 INFO L225 Difference]: With dead ends: 98 [2021-08-27 05:47:33,925 INFO L226 Difference]: Without dead ends: 98 [2021-08-27 05:47:33,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:47:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-27 05:47:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-08-27 05:47:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 66 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:47:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-08-27 05:47:33,930 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-08-27 05:47:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:33,931 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-08-27 05:47:33,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-08-27 05:47:33,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 05:47:33,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:33,932 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:33,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:47:33,932 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:33,932 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-08-27 05:47:33,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:33,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334503570] [2021-08-27 05:47:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:33,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:34,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:34,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:34,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334503570] [2021-08-27 05:47:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334503570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:47:34,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571979740] [2021-08-27 05:47:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:34,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:47:34,055 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) [2021-08-27 05:47:34,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 05:47:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:47:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:47:34,360 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:47:34,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-08-27 05:47:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:34,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571979740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:34,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:47:34,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-27 05:47:34,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642139576] [2021-08-27 05:47:34,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:47:34,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:47:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:47:34,522 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:34,694 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-27 05:47:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:47:34,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 05:47:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:34,696 INFO L225 Difference]: With dead ends: 104 [2021-08-27 05:47:34,696 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 05:47:34,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:47:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 05:47:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-08-27 05:47:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.4) internal successors, (70), 64 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:47:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-08-27 05:47:34,715 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-08-27 05:47:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:34,717 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-08-27 05:47:34,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-08-27 05:47:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:47:34,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:34,719 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:34,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:47:34,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-27 05:47:34,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:34,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:34,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-08-27 05:47:34,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:34,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685279154] [2021-08-27 05:47:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:34,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:35,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:35,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:35,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685279154] [2021-08-27 05:47:35,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685279154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:47:35,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803863008] [2021-08-27 05:47:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:35,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:35,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:47:35,063 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) [2021-08-27 05:47:35,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 05:47:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 05:47:35,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:47:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:35,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803863008] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:35,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:47:35,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-08-27 05:47:35,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601751691] [2021-08-27 05:47:35,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:47:35,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:47:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:47:35,332 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:35,369 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-08-27 05:47:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:47:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-27 05:47:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:35,370 INFO L225 Difference]: With dead ends: 97 [2021-08-27 05:47:35,370 INFO L226 Difference]: Without dead ends: 97 [2021-08-27 05:47:35,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:47:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-27 05:47:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-08-27 05:47:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:47:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-08-27 05:47:35,374 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-08-27 05:47:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:35,374 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-08-27 05:47:35,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-08-27 05:47:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 05:47:35,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:35,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:35,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:47:35,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:35,590 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:35,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-08-27 05:47:35,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:35,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735147591] [2021-08-27 05:47:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:35,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:35,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:35,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735147591] [2021-08-27 05:47:35,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735147591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:47:35,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662151011] [2021-08-27 05:47:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:35,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:35,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:47:35,765 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) [2021-08-27 05:47:35,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 05:47:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:35,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 05:47:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:47:36,040 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:47:36,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-08-27 05:47:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:47:36,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662151011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:47:36,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:47:36,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-27 05:47:36,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817194851] [2021-08-27 05:47:36,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:47:36,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:47:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:47:36,256 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:36,793 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-08-27 05:47:36,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:47:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 05:47:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:36,796 INFO L225 Difference]: With dead ends: 112 [2021-08-27 05:47:36,796 INFO L226 Difference]: Without dead ends: 112 [2021-08-27 05:47:36,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-27 05:47:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-27 05:47:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-08-27 05:47:36,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:47:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-08-27 05:47:36,800 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-08-27 05:47:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:36,800 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-08-27 05:47:36,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:47:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-08-27 05:47:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 05:47:36,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:36,801 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:36,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:47:37,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:47:37,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-08-27 05:47:37,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:37,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882926709] [2021-08-27 05:47:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:37,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:37,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:47:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 05:47:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:47:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:47:37,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:47:37,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882926709] [2021-08-27 05:47:37,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882926709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:47:37,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:47:37,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:47:37,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379050619] [2021-08-27 05:47:37,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:47:37,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:47:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:47:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:47:37,104 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:37,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:47:37,298 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-08-27 05:47:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:47:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-08-27 05:47:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:47:37,299 INFO L225 Difference]: With dead ends: 71 [2021-08-27 05:47:37,299 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 05:47:37,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:47:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 05:47:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 05:47:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 05:47:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-08-27 05:47:37,302 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-08-27 05:47:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:47:37,302 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-08-27 05:47:37,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:47:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-08-27 05:47:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 05:47:37,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:47:37,303 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:47:37,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 05:47:37,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:47:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:47:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-08-27 05:47:37,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:47:37,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441095916] [2021-08-27 05:47:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:47:37,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:47:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:47:37,317 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:47:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:47:37,344 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 05:47:37,345 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:47:37,345 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:47:37,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:47:37,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:47:37,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:47:37,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,347 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,348 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION [2021-08-27 05:47:37,349 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION [2021-08-27 05:47:37,356 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION [2021-08-27 05:47:37,357 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION [2021-08-27 05:47:37,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 05:47:37,369 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:47:37,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:47:37 BoogieIcfgContainer [2021-08-27 05:47:37,406 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:47:37,407 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:47:37,407 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:47:37,407 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:47:37,407 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:47:31" (3/4) ... [2021-08-27 05:47:37,408 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 05:47:37,442 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:47:37,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:47:37,443 INFO L168 Benchmark]: Toolchain (without parser) took 7251.41 ms. Allocated memory was 67.1 MB in the beginning and 132.1 MB in the end (delta: 65.0 MB). Free memory was 45.9 MB in the beginning and 65.9 MB in the end (delta: -20.0 MB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:47:37,443 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 67.1 MB. Free memory was 47.7 MB in the beginning and 47.7 MB in the end (delta: 36.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:47:37,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.15 ms. Allocated memory is still 67.1 MB. Free memory was 45.7 MB in the beginning and 44.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:47:37,444 INFO L168 Benchmark]: Boogie Preprocessor took 79.61 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 41.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:47:37,445 INFO L168 Benchmark]: RCFGBuilder took 775.53 ms. Allocated memory was 67.1 MB in the beginning and 90.2 MB in the end (delta: 23.1 MB). Free memory was 41.7 MB in the beginning and 55.9 MB in the end (delta: -14.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:47:37,445 INFO L168 Benchmark]: TraceAbstraction took 5971.48 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 55.4 MB in the beginning and 69.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:47:37,445 INFO L168 Benchmark]: Witness Printer took 36.04 ms. Allocated memory is still 132.1 MB. Free memory was 69.0 MB in the beginning and 65.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:47:37,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 67.1 MB. Free memory was 47.7 MB in the beginning and 47.7 MB in the end (delta: 36.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 381.15 ms. Allocated memory is still 67.1 MB. Free memory was 45.7 MB in the beginning and 44.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.61 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 41.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 775.53 ms. Allocated memory was 67.1 MB in the beginning and 90.2 MB in the end (delta: 23.1 MB). Free memory was 41.7 MB in the beginning and 55.9 MB in the end (delta: -14.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5971.48 ms. Allocated memory was 90.2 MB in the beginning and 132.1 MB in the end (delta: 41.9 MB). Free memory was 55.4 MB in the beginning and 69.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. * Witness Printer took 36.04 ms. Allocated memory is still 132.1 MB. Free memory was 69.0 MB in the beginning and 65.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=52, \old(a)=57, \old(b)=54, \old(b)=55, \old(n)=50, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 5865.0ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 14.9ms, AutomataDifference: 1940.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 558 SDtfs, 748 SDslu, 897 SDs, 0 SdLazy, 1277 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1050.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1124.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 72.6ms SsaConstructionTime, 221.8ms SatisfiabilityAnalysisTime, 1849.2ms InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 1455 SizeOfPredicates, 8 NumberOfNonLiveVariables, 618 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 14 InterpolantComputations, 9 PerfectInterpolantSequences, 10/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-27 05:47:37,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...