./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 54858612 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-properties/simple_built_from_end.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 279a162aa90145a7316b3266460570a8e3cad8e6 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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-properties/simple_built_from_end.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 279a162aa90145a7316b3266460570a8e3cad8e6 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-26 03:46:33,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 03:46:33,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 03:46:33,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 03:46:33,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 03:46:33,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 03:46:33,691 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 03:46:33,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 03:46:33,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 03:46:33,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 03:46:33,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 03:46:33,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 03:46:33,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 03:46:33,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 03:46:33,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 03:46:33,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 03:46:33,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 03:46:33,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 03:46:33,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 03:46:33,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 03:46:33,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 03:46:33,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 03:46:33,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 03:46:33,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 03:46:33,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 03:46:33,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 03:46:33,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 03:46:33,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 03:46:33,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 03:46:33,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 03:46:33,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 03:46:33,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 03:46:33,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 03:46:33,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 03:46:33,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 03:46:33,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 03:46:33,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 03:46:33,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 03:46:33,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 03:46:33,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 03:46:33,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 03:46:33,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-26 03:46:33,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 03:46:33,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 03:46:33,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 03:46:33,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 03:46:33,811 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 03:46:33,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 03:46:33,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 03:46:33,812 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 03:46:33,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 03:46:33,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 03:46:33,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 03:46:33,814 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-26 03:46:33,814 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-26 03:46:33,814 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-26 03:46:33,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 03:46:33,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-26 03:46:33,815 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 03:46:33,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 03:46:33,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 03:46:33,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 03:46:33,816 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 03:46:33,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 03:46:33,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:46:33,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 03:46:33,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 03:46:33,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 03:46:33,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 03:46:33,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 03:46:33,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-10-26 03:46:34,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 03:46:34,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 03:46:34,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 03:46:34,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 03:46:34,295 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 03:46:34,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-26 03:46:34,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e22d728f/21b2badcf06843328a9ed9a0fde42e8a/FLAGb5dfdbc55 [2020-10-26 03:46:35,041 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 03:46:35,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-26 03:46:35,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e22d728f/21b2badcf06843328a9ed9a0fde42e8a/FLAGb5dfdbc55 [2020-10-26 03:46:35,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e22d728f/21b2badcf06843328a9ed9a0fde42e8a [2020-10-26 03:46:35,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 03:46:35,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-26 03:46:35,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 03:46:35,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 03:46:35,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 03:46:35,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f42e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35, skipping insertion in model container [2020-10-26 03:46:35,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 03:46:35,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 03:46:35,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:46:35,720 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 03:46:35,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:46:35,874 INFO L208 MainTranslator]: Completed translation [2020-10-26 03:46:35,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35 WrapperNode [2020-10-26 03:46:35,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 03:46:35,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 03:46:35,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 03:46:35,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 03:46:35,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... [2020-10-26 03:46:35,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 03:46:35,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 03:46:35,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 03:46:35,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 03:46:35,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:46:36,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 03:46:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 03:46:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 03:46:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-26 03:46:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-26 03:46:36,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-26 03:46:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-26 03:46:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-26 03:46:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-26 03:46:36,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 03:46:36,063 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 03:46:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 03:46:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 03:46:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 03:46:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 03:46:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 03:46:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-26 03:46:36,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-26 03:46:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-26 03:46:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-26 03:46:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-26 03:46:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-26 03:46:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-26 03:46:36,066 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-26 03:46:36,067 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-26 03:46:36,068 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-26 03:46:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-26 03:46:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-26 03:46:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-26 03:46:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-26 03:46:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-26 03:46:36,069 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-26 03:46:36,070 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-26 03:46:36,071 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-26 03:46:36,072 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-26 03:46:36,073 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 03:46:36,074 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-26 03:46:36,075 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-26 03:46:36,076 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-26 03:46:36,077 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-26 03:46:36,078 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-26 03:46:36,079 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 03:46:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 03:46:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 03:46:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 03:46:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 03:46:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 03:46:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 03:46:36,514 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-26 03:46:36,789 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 03:46:36,789 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 03:46:36,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:46:36 BoogieIcfgContainer [2020-10-26 03:46:36,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 03:46:36,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 03:46:36,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 03:46:36,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 03:46:36,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 03:46:35" (1/3) ... [2020-10-26 03:46:36,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4e553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:46:36, skipping insertion in model container [2020-10-26 03:46:36,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:35" (2/3) ... [2020-10-26 03:46:36,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4e553 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:46:36, skipping insertion in model container [2020-10-26 03:46:36,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:46:36" (3/3) ... [2020-10-26 03:46:36,814 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-26 03:46:36,828 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 03:46:36,834 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-26 03:46:36,855 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-26 03:46:36,895 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 03:46:36,895 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-26 03:46:36,895 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 03:46:36,895 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 03:46:36,896 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 03:46:36,896 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 03:46:36,896 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 03:46:36,896 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 03:46:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-26 03:46:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:46:36,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:36,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:36,931 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:36,940 INFO L82 PathProgramCache]: Analyzing trace with hash 691471212, now seen corresponding path program 1 times [2020-10-26 03:46:36,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:36,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213893757] [2020-10-26 03:46:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:37,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213893757] [2020-10-26 03:46:37,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:37,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:46:37,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632392218] [2020-10-26 03:46:37,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 03:46:37,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:37,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 03:46:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:37,242 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-26 03:46:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:37,373 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-26 03:46:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:46:37,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-26 03:46:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:37,384 INFO L225 Difference]: With dead ends: 51 [2020-10-26 03:46:37,384 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 03:46:37,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 03:46:37,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-26 03:46:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 03:46:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-26 03:46:37,426 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2020-10-26 03:46:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:37,426 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-26 03:46:37,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 03:46:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-26 03:46:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 03:46:37,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:37,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:37,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 03:46:37,427 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:37,428 INFO L82 PathProgramCache]: Analyzing trace with hash -39877821, now seen corresponding path program 1 times [2020-10-26 03:46:37,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:37,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137865220] [2020-10-26 03:46:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137865220] [2020-10-26 03:46:37,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:37,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:46:37,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028292759] [2020-10-26 03:46:37,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:46:37,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:46:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:37,527 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2020-10-26 03:46:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:37,646 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-26 03:46:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:46:37,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 03:46:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:37,648 INFO L225 Difference]: With dead ends: 41 [2020-10-26 03:46:37,648 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 03:46:37,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:37,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 03:46:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-26 03:46:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 03:46:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-26 03:46:37,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 10 [2020-10-26 03:46:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:37,656 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-26 03:46:37,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:46:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-26 03:46:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 03:46:37,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:37,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:37,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 03:46:37,657 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash -39877820, now seen corresponding path program 1 times [2020-10-26 03:46:37,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:37,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861822204] [2020-10-26 03:46:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:37,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861822204] [2020-10-26 03:46:37,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:37,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 03:46:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87352399] [2020-10-26 03:46:37,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:46:37,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:37,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:46:37,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:37,747 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 4 states. [2020-10-26 03:46:37,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:37,854 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-26 03:46:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:46:37,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 03:46:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:37,856 INFO L225 Difference]: With dead ends: 39 [2020-10-26 03:46:37,856 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 03:46:37,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 03:46:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-26 03:46:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 03:46:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-26 03:46:37,863 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 10 [2020-10-26 03:46:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:37,863 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-26 03:46:37,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:46:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-26 03:46:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-26 03:46:37,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:37,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:37,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 03:46:37,865 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:37,866 INFO L82 PathProgramCache]: Analyzing trace with hash -39879136, now seen corresponding path program 1 times [2020-10-26 03:46:37,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:37,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921406072] [2020-10-26 03:46:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:37,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921406072] [2020-10-26 03:46:37,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:37,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:46:37,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902509644] [2020-10-26 03:46:37,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:46:37,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:37,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:46:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:37,931 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 4 states. [2020-10-26 03:46:38,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:38,030 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-26 03:46:38,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 03:46:38,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-26 03:46:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:38,032 INFO L225 Difference]: With dead ends: 34 [2020-10-26 03:46:38,032 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 03:46:38,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 03:46:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-26 03:46:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 03:46:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-26 03:46:38,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2020-10-26 03:46:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:38,038 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-26 03:46:38,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:46:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-26 03:46:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 03:46:38,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:38,040 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:38,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 03:46:38,041 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:38,041 INFO L82 PathProgramCache]: Analyzing trace with hash -905845953, now seen corresponding path program 1 times [2020-10-26 03:46:38,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:38,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969342932] [2020-10-26 03:46:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:38,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969342932] [2020-10-26 03:46:38,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:38,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 03:46:38,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771517062] [2020-10-26 03:46:38,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 03:46:38,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 03:46:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:38,174 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 5 states. [2020-10-26 03:46:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:38,285 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-26 03:46:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 03:46:38,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-26 03:46:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:38,286 INFO L225 Difference]: With dead ends: 43 [2020-10-26 03:46:38,286 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 03:46:38,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 03:46:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 03:46:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-10-26 03:46:38,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 03:46:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-26 03:46:38,292 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 16 [2020-10-26 03:46:38,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:38,292 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-26 03:46:38,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 03:46:38,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-26 03:46:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 03:46:38,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:38,293 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:38,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 03:46:38,294 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:38,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:38,295 INFO L82 PathProgramCache]: Analyzing trace with hash -905845910, now seen corresponding path program 1 times [2020-10-26 03:46:38,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:38,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20730655] [2020-10-26 03:46:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:38,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20730655] [2020-10-26 03:46:38,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:38,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:46:38,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813146196] [2020-10-26 03:46:38,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 03:46:38,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 03:46:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:38,366 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 5 states. [2020-10-26 03:46:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:38,476 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-26 03:46:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 03:46:38,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-26 03:46:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:38,477 INFO L225 Difference]: With dead ends: 35 [2020-10-26 03:46:38,477 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 03:46:38,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 03:46:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 03:46:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-26 03:46:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 03:46:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 03:46:38,481 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2020-10-26 03:46:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:38,482 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 03:46:38,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 03:46:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 03:46:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 03:46:38,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:38,483 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:38,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 03:46:38,483 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -905845909, now seen corresponding path program 1 times [2020-10-26 03:46:38,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:38,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480960666] [2020-10-26 03:46:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:38,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480960666] [2020-10-26 03:46:38,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:38,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 03:46:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324110584] [2020-10-26 03:46:38,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 03:46:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 03:46:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:38,579 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-26 03:46:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:38,677 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-26 03:46:38,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 03:46:38,677 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-26 03:46:38,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:38,678 INFO L225 Difference]: With dead ends: 38 [2020-10-26 03:46:38,678 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 03:46:38,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 03:46:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 03:46:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-26 03:46:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 03:46:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-26 03:46:38,682 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2020-10-26 03:46:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:38,683 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-26 03:46:38,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 03:46:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-26 03:46:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 03:46:38,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:38,684 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:38,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 03:46:38,684 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:38,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1715336483, now seen corresponding path program 1 times [2020-10-26 03:46:38,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:38,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194899641] [2020-10-26 03:46:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 03:46:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:38,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194899641] [2020-10-26 03:46:38,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:38,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 03:46:38,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42649478] [2020-10-26 03:46:38,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 03:46:38,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 03:46:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 03:46:38,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 03:46:38,775 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-10-26 03:46:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:38,883 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-10-26 03:46:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 03:46:38,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-26 03:46:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:38,885 INFO L225 Difference]: With dead ends: 36 [2020-10-26 03:46:38,885 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 03:46:38,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 03:46:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 03:46:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-26 03:46:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 03:46:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-26 03:46:38,889 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 20 [2020-10-26 03:46:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:38,889 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-26 03:46:38,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 03:46:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-26 03:46:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-26 03:46:38,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:38,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:38,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 03:46:38,891 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:38,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1639972725, now seen corresponding path program 1 times [2020-10-26 03:46:38,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 03:46:38,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218252918] [2020-10-26 03:46:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 03:46:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 03:46:38,909 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 03:46:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 03:46:38,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 03:46:38,950 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 03:46:38,950 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 03:46:38,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 03:46:38,964 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-26 03:46:38,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 03:46:38 BoogieIcfgContainer [2020-10-26 03:46:38,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 03:46:38,986 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 03:46:38,986 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 03:46:38,986 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 03:46:38,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:46:36" (3/4) ... [2020-10-26 03:46:38,991 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 03:46:38,991 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 03:46:38,999 INFO L168 Benchmark]: Toolchain (without parser) took 3634.73 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 30.4 MB in the beginning and 34.0 MB in the end (delta: -3.6 MB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:39,001 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 44.0 MB. Free memory was 22.2 MB in the beginning and 22.1 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:46:39,002 INFO L168 Benchmark]: CACSL2BoogieTranslator took 509.77 ms. Allocated memory is still 54.5 MB. Free memory was 29.8 MB in the beginning and 34.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:39,003 INFO L168 Benchmark]: Boogie Preprocessor took 107.01 ms. Allocated memory is still 54.5 MB. Free memory was 34.1 MB in the beginning and 31.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:39,004 INFO L168 Benchmark]: RCFGBuilder took 807.03 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.4 MB in the beginning and 31.4 MB in the end (delta: 90.9 kB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:39,008 INFO L168 Benchmark]: TraceAbstraction took 2189.83 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 30.7 MB in the beginning and 34.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:39,009 INFO L168 Benchmark]: Witness Printer took 5.46 ms. Allocated memory is still 81.8 MB. Free memory is still 34.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:46:39,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 44.0 MB. Free memory was 22.2 MB in the beginning and 22.1 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 509.77 ms. Allocated memory is still 54.5 MB. Free memory was 29.8 MB in the beginning and 34.1 MB in the end (delta: -4.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 107.01 ms. Allocated memory is still 54.5 MB. Free memory was 34.1 MB in the beginning and 31.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 807.03 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.4 MB in the beginning and 31.4 MB in the end (delta: 90.9 kB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2189.83 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 30.7 MB in the beginning and 34.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. * Witness Printer took 5.46 ms. Allocated memory is still 81.8 MB. Free memory is still 34.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L536] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L538] t->n = p VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L539] p = t VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={0:0}, t={-1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 224 SDslu, 98 SDs, 0 SdLazy, 458 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 47 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 6454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-5485861 [2020-10-26 03:46:41,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 03:46:41,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 03:46:41,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 03:46:41,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 03:46:41,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 03:46:41,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 03:46:41,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 03:46:41,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 03:46:41,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 03:46:41,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 03:46:41,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 03:46:41,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 03:46:41,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 03:46:41,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 03:46:41,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 03:46:41,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 03:46:41,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 03:46:41,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 03:46:41,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 03:46:41,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 03:46:41,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 03:46:41,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 03:46:41,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 03:46:41,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 03:46:41,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 03:46:41,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 03:46:41,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 03:46:41,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 03:46:41,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 03:46:41,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 03:46:41,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 03:46:41,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 03:46:41,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 03:46:41,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 03:46:41,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 03:46:41,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 03:46:41,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 03:46:41,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 03:46:41,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 03:46:41,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 03:46:41,744 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-10-26 03:46:41,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 03:46:41,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 03:46:41,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 03:46:41,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 03:46:41,805 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 03:46:41,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 03:46:41,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 03:46:41,805 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 03:46:41,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 03:46:41,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 03:46:41,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 03:46:41,808 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-26 03:46:41,808 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-26 03:46:41,808 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-26 03:46:41,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 03:46:41,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-26 03:46:41,809 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-26 03:46:41,809 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-26 03:46:41,810 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 03:46:41,810 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 03:46:41,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 03:46:41,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 03:46:41,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 03:46:41,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 03:46:41,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:46:41,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 03:46:41,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 03:46:41,812 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-26 03:46:41,812 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-26 03:46:41,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 03:46:41,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-26 03:46:41,813 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-10-26 03:46:42,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 03:46:42,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 03:46:42,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 03:46:42,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 03:46:42,298 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 03:46:42,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-26 03:46:42,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb29a1233/fc19664657fb4e829198b21fe86f9782/FLAG5db258bc4 [2020-10-26 03:46:43,115 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 03:46:43,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-26 03:46:43,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb29a1233/fc19664657fb4e829198b21fe86f9782/FLAG5db258bc4 [2020-10-26 03:46:43,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb29a1233/fc19664657fb4e829198b21fe86f9782 [2020-10-26 03:46:43,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 03:46:43,346 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-26 03:46:43,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 03:46:43,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 03:46:43,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 03:46:43,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:43,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b7b7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43, skipping insertion in model container [2020-10-26 03:46:43,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:43,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 03:46:43,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 03:46:43,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:46:43,815 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 03:46:43,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 03:46:43,943 INFO L208 MainTranslator]: Completed translation [2020-10-26 03:46:43,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43 WrapperNode [2020-10-26 03:46:43,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 03:46:43,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 03:46:43,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 03:46:43,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 03:46:43,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:43,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:43,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:43,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:44,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:44,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:44,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... [2020-10-26 03:46:44,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 03:46:44,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 03:46:44,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 03:46:44,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 03:46:44,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 03:46:44,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 03:46:44,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 03:46:44,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-10-26 03:46:44,117 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 03:46:44,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-26 03:46:44,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-26 03:46:44,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-26 03:46:44,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-26 03:46:44,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-26 03:46:44,118 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-26 03:46:44,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 03:46:44,119 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 03:46:44,119 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 03:46:44,119 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 03:46:44,119 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 03:46:44,120 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 03:46:44,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 03:46:44,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 03:46:44,120 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-26 03:46:44,120 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-26 03:46:44,121 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-26 03:46:44,121 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-26 03:46:44,121 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-26 03:46:44,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-26 03:46:44,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-26 03:46:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-26 03:46:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-26 03:46:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-26 03:46:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-26 03:46:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-26 03:46:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-26 03:46:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-26 03:46:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-26 03:46:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-26 03:46:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-26 03:46:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-26 03:46:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-26 03:46:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-26 03:46:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-26 03:46:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-26 03:46:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-26 03:46:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-26 03:46:44,125 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-26 03:46:44,125 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-26 03:46:44,125 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-26 03:46:44,125 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-26 03:46:44,125 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-26 03:46:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-26 03:46:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-26 03:46:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-26 03:46:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-26 03:46:44,126 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-26 03:46:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-26 03:46:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-26 03:46:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-26 03:46:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-26 03:46:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-26 03:46:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-26 03:46:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-26 03:46:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-26 03:46:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-26 03:46:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-26 03:46:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-26 03:46:44,129 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-26 03:46:44,129 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-26 03:46:44,129 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-26 03:46:44,129 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-26 03:46:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-26 03:46:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-26 03:46:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-26 03:46:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-26 03:46:44,130 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-26 03:46:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-26 03:46:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 03:46:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-26 03:46:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-26 03:46:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-26 03:46:44,131 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-26 03:46:44,132 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-26 03:46:44,132 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-26 03:46:44,132 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-26 03:46:44,132 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-26 03:46:44,133 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-26 03:46:44,133 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-26 03:46:44,133 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 03:46:44,133 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-26 03:46:44,133 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-26 03:46:44,133 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-26 03:46:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-26 03:46:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-26 03:46:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-26 03:46:44,134 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-26 03:46:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-26 03:46:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-26 03:46:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-26 03:46:44,135 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-26 03:46:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-26 03:46:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-26 03:46:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-26 03:46:44,136 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-26 03:46:44,137 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-26 03:46:44,137 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-26 03:46:44,137 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-26 03:46:44,137 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-26 03:46:44,138 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-26 03:46:44,138 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-26 03:46:44,138 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-26 03:46:44,138 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-26 03:46:44,139 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-26 03:46:44,139 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-26 03:46:44,139 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-26 03:46:44,139 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-26 03:46:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-26 03:46:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-26 03:46:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-26 03:46:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-26 03:46:44,140 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-26 03:46:44,141 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-26 03:46:44,141 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-26 03:46:44,141 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-26 03:46:44,141 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-26 03:46:44,141 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-26 03:46:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-26 03:46:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-26 03:46:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-26 03:46:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 03:46:44,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 03:46:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-26 03:46:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 03:46:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-26 03:46:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 03:46:44,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 03:46:44,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-26 03:46:44,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 03:46:44,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-10-26 03:46:44,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-26 03:46:44,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-26 03:46:44,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 03:46:44,822 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-26 03:46:45,098 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 03:46:45,099 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 03:46:45,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:46:45 BoogieIcfgContainer [2020-10-26 03:46:45,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 03:46:45,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 03:46:45,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 03:46:45,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 03:46:45,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 03:46:43" (1/3) ... [2020-10-26 03:46:45,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31058540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:46:45, skipping insertion in model container [2020-10-26 03:46:45,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 03:46:43" (2/3) ... [2020-10-26 03:46:45,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31058540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 03:46:45, skipping insertion in model container [2020-10-26 03:46:45,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:46:45" (3/3) ... [2020-10-26 03:46:45,111 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-26 03:46:45,123 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-26 03:46:45,129 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-26 03:46:45,143 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-26 03:46:45,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 03:46:45,168 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-26 03:46:45,168 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-26 03:46:45,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 03:46:45,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 03:46:45,168 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 03:46:45,169 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 03:46:45,169 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 03:46:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-26 03:46:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:46:45,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:45,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:45,197 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:45,204 INFO L82 PathProgramCache]: Analyzing trace with hash -251734950, now seen corresponding path program 1 times [2020-10-26 03:46:45,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:45,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245590737] [2020-10-26 03:46:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:45,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-26 03:46:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:45,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:45,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245590737] [2020-10-26 03:46:45,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:45,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-26 03:46:45,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806003090] [2020-10-26 03:46:45,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-26 03:46:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-26 03:46:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-26 03:46:45,694 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-10-26 03:46:45,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:45,713 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-26 03:46:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-26 03:46:45,715 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-26 03:46:45,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:45,725 INFO L225 Difference]: With dead ends: 36 [2020-10-26 03:46:45,725 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 03:46:45,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-26 03:46:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 03:46:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-26 03:46:45,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 03:46:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-26 03:46:45,768 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 9 [2020-10-26 03:46:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:45,769 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-26 03:46:45,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-26 03:46:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-26 03:46:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:46:45,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:45,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:45,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-26 03:46:45,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:45,987 INFO L82 PathProgramCache]: Analyzing trace with hash -251735570, now seen corresponding path program 1 times [2020-10-26 03:46:45,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:45,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978956326] [2020-10-26 03:46:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-26 03:46:46,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:46,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:46,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978956326] [2020-10-26 03:46:46,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:46,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-26 03:46:46,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107232416] [2020-10-26 03:46:46,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 03:46:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 03:46:46,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:46,362 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 3 states. [2020-10-26 03:46:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:46,459 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-26 03:46:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:46:46,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-26 03:46:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:46,462 INFO L225 Difference]: With dead ends: 42 [2020-10-26 03:46:46,463 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 03:46:46,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 03:46:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-26 03:46:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 03:46:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-26 03:46:46,470 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2020-10-26 03:46:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:46,471 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-26 03:46:46,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 03:46:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-26 03:46:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:46:46,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:46,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:46,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-26 03:46:46,689 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash -251735527, now seen corresponding path program 1 times [2020-10-26 03:46:46,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:46,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057550997] [2020-10-26 03:46:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 03:46:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:47,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:47,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057550997] [2020-10-26 03:46:47,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:47,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-26 03:46:47,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172064938] [2020-10-26 03:46:47,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 03:46:47,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:47,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 03:46:47,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:47,029 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 3 states. [2020-10-26 03:46:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:47,111 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-26 03:46:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:46:47,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-26 03:46:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:47,114 INFO L225 Difference]: With dead ends: 40 [2020-10-26 03:46:47,114 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 03:46:47,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 03:46:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-10-26 03:46:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 03:46:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-26 03:46:47,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 9 [2020-10-26 03:46:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:47,125 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-26 03:46:47,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 03:46:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-26 03:46:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:46:47,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:47,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:47,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-26 03:46:47,339 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash -251734212, now seen corresponding path program 1 times [2020-10-26 03:46:47,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:47,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85120775] [2020-10-26 03:46:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-26 03:46:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:47,654 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-26 03:46:47,654 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:47,659 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:47,660 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:47,660 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-26 03:46:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:47,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:47,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85120775] [2020-10-26 03:46:47,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:47,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-26 03:46:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948517472] [2020-10-26 03:46:47,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 03:46:47,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 03:46:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:47,689 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 3 states. [2020-10-26 03:46:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:47,769 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-26 03:46:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:46:47,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-26 03:46:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:47,771 INFO L225 Difference]: With dead ends: 29 [2020-10-26 03:46:47,772 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 03:46:47,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 03:46:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 03:46:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 03:46:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 03:46:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-26 03:46:47,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2020-10-26 03:46:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:47,778 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-26 03:46:47,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 03:46:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-26 03:46:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-26 03:46:47,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:47,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:47,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-26 03:46:47,992 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:47,994 INFO L82 PathProgramCache]: Analyzing trace with hash -251734211, now seen corresponding path program 1 times [2020-10-26 03:46:47,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:47,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150764111] [2020-10-26 03:46:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-26 03:46:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:48,264 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-26 03:46:48,265 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:48,274 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:48,275 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:48,275 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-26 03:46:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:48,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:48,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150764111] [2020-10-26 03:46:48,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:48,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-10-26 03:46:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812274538] [2020-10-26 03:46:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:46:48,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:46:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:48,356 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 4 states. [2020-10-26 03:46:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:48,433 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-26 03:46:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 03:46:48,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-26 03:46:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:48,435 INFO L225 Difference]: With dead ends: 27 [2020-10-26 03:46:48,435 INFO L226 Difference]: Without dead ends: 27 [2020-10-26 03:46:48,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-26 03:46:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-26 03:46:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 03:46:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-26 03:46:48,440 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2020-10-26 03:46:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:48,441 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-26 03:46:48,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:46:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-26 03:46:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 03:46:48,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:48,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:48,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-26 03:46:48,652 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128460, now seen corresponding path program 1 times [2020-10-26 03:46:48,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:48,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166609650] [2020-10-26 03:46:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 03:46:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:48,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166609650] [2020-10-26 03:46:48,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:48,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-26 03:46:48,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330948879] [2020-10-26 03:46:48,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:46:48,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:46:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:48,960 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2020-10-26 03:46:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:49,107 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-26 03:46:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:46:49,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-26 03:46:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:49,110 INFO L225 Difference]: With dead ends: 41 [2020-10-26 03:46:49,110 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 03:46:49,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:49,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 03:46:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2020-10-26 03:46:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 03:46:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-26 03:46:49,117 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 14 [2020-10-26 03:46:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:49,118 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-26 03:46:49,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:46:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-26 03:46:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 03:46:49,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:49,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:49,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-26 03:46:49,337 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128503, now seen corresponding path program 1 times [2020-10-26 03:46:49,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:49,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606646648] [2020-10-26 03:46:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:49,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-26 03:46:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:49,608 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-26 03:46:49,609 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:49,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:49,612 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:49,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-26 03:46:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:49,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606646648] [2020-10-26 03:46:49,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:49,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-26 03:46:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200958818] [2020-10-26 03:46:49,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 03:46:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 03:46:49,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 03:46:49,676 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-10-26 03:46:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:49,851 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-10-26 03:46:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 03:46:49,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-26 03:46:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:49,853 INFO L225 Difference]: With dead ends: 33 [2020-10-26 03:46:49,853 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 03:46:49,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 03:46:49,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-10-26 03:46:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-26 03:46:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-26 03:46:49,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2020-10-26 03:46:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:49,858 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-26 03:46:49,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 03:46:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-26 03:46:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-26 03:46:49,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:49,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:50,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-26 03:46:50,068 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128504, now seen corresponding path program 1 times [2020-10-26 03:46:50,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:50,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591665816] [2020-10-26 03:46:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:50,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-26 03:46:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:50,407 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-26 03:46:50,408 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:50,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:50,419 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:50,420 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-26 03:46:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:50,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:50,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591665816] [2020-10-26 03:46:50,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:50,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-26 03:46:50,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279431781] [2020-10-26 03:46:50,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 03:46:50,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:50,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 03:46:50,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 03:46:50,573 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-26 03:46:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:50,848 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-26 03:46:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 03:46:50,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-26 03:46:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:50,851 INFO L225 Difference]: With dead ends: 36 [2020-10-26 03:46:50,851 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 03:46:50,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 03:46:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 03:46:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-10-26 03:46:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 03:46:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-26 03:46:50,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 14 [2020-10-26 03:46:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:50,855 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-26 03:46:50,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 03:46:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-26 03:46:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 03:46:50,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:50,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:51,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-26 03:46:51,061 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1674350128, now seen corresponding path program 1 times [2020-10-26 03:46:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:51,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295906820] [2020-10-26 03:46:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 03:46:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-26 03:46:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-26 03:46:51,393 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-26 03:46:51,394 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:51,398 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:51,398 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:51,398 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-26 03:46:51,439 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-10-26 03:46:51,440 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2020-10-26 03:46:51,441 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:51,444 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:51,445 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:51,445 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2020-10-26 03:46:51,469 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-10-26 03:46:51,470 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-26 03:46:51,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:51,474 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-26 03:46:51,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-10-26 03:46:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:51,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-26 03:46:51,516 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-26 03:46:51,521 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-26 03:46:51,522 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-26 03:46:51,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2020-10-26 03:46:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 03:46:51,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295906820] [2020-10-26 03:46:51,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-26 03:46:51,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-26 03:46:51,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932200590] [2020-10-26 03:46:51,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 03:46:51,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-26 03:46:51,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 03:46:51,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 03:46:51,541 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-26 03:46:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 03:46:51,753 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-26 03:46:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 03:46:51,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 03:46:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 03:46:51,755 INFO L225 Difference]: With dead ends: 34 [2020-10-26 03:46:51,755 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 03:46:51,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 03:46:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 03:46:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-26 03:46:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 03:46:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-26 03:46:51,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2020-10-26 03:46:51,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 03:46:51,761 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-26 03:46:51,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 03:46:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-26 03:46:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 03:46:51,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 03:46:51,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 03:46:51,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-10-26 03:46:51,965 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-26 03:46:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 03:46:51,967 INFO L82 PathProgramCache]: Analyzing trace with hash -361076259, now seen corresponding path program 1 times [2020-10-26 03:46:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-26 03:46:51,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174520395] [2020-10-26 03:46:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-10-26 03:46:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 03:46:52,296 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 03:46:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 03:46:52,353 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 03:46:52,409 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-26 03:46:52,409 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 03:46:52,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-10-26 03:46:52,640 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-26 03:46:52,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 03:46:52 BoogieIcfgContainer [2020-10-26 03:46:52,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 03:46:52,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 03:46:52,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 03:46:52,657 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 03:46:52,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 03:46:45" (3/4) ... [2020-10-26 03:46:52,662 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-26 03:46:52,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 03:46:52,664 INFO L168 Benchmark]: Toolchain (without parser) took 9324.57 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 24.8 MB in the beginning and 40.5 MB in the end (delta: -15.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:52,665 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 37.7 MB. Free memory was 20.3 MB in the beginning and 20.2 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:46:52,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 595.04 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:52,666 INFO L168 Benchmark]: Boogie Preprocessor took 73.25 ms. Allocated memory is still 48.2 MB. Free memory was 22.7 MB in the beginning and 19.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:52,667 INFO L168 Benchmark]: RCFGBuilder took 1082.01 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 19.8 MB in the beginning and 32.5 MB in the end (delta: -12.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:52,668 INFO L168 Benchmark]: TraceAbstraction took 7553.50 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 32.2 MB in the beginning and 40.5 MB in the end (delta: -8.3 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2020-10-26 03:46:52,669 INFO L168 Benchmark]: Witness Printer took 5.73 ms. Allocated memory is still 86.0 MB. Free memory is still 40.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 03:46:52,672 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 37.7 MB. Free memory was 20.3 MB in the beginning and 20.2 MB in the end (delta: 28.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 595.04 ms. Allocated memory is still 48.2 MB. Free memory was 24.1 MB in the beginning and 22.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 73.25 ms. Allocated memory is still 48.2 MB. Free memory was 22.7 MB in the beginning and 19.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1082.01 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 19.8 MB in the beginning and 32.5 MB in the end (delta: -12.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7553.50 ms. Allocated memory was 58.7 MB in the beginning and 86.0 MB in the end (delta: 27.3 MB). Free memory was 32.2 MB in the beginning and 40.5 MB in the end (delta: -8.3 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.73 ms. Allocated memory is still 86.0 MB. Free memory is still 40.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L536] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L537] t->h = 1 VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L538] t->n = p VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L539] p = t VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L542] EXPR p->h VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=1, t={1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, p->n={0:0}, t={1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 61 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 184 SDslu, 142 SDs, 0 SdLazy, 201 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 41 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 7940 SizeOfPredicates, 22 NumberOfNonLiveVariables, 627 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 8/8 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...