./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer --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=/tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer --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-a4ecdab [2020-11-29 19:17:18,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:17:18,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:17:18,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:17:18,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:17:18,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:17:18,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:17:18,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:17:18,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:17:18,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:17:18,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:17:18,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:17:18,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:17:18,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:17:18,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:17:18,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:17:18,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:17:18,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:17:18,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:17:18,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:17:18,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:17:18,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:17:18,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:17:18,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:17:18,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:17:18,153 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:17:18,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:17:18,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:17:18,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:17:18,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:17:18,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:17:18,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:17:18,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:17:18,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:17:18,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:17:18,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:17:18,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:17:18,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:17:18,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:17:18,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:17:18,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:17:18,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 19:17:18,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:17:18,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:17:18,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:17:18,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:17:18,247 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:17:18,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:17:18,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:17:18,248 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:17:18,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:17:18,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:17:18,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:17:18,251 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 19:17:18,251 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 19:17:18,252 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 19:17:18,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:17:18,252 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 19:17:18,253 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:17:18,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:17:18,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:17:18,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:17:18,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:17:18,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:17:18,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:17:18,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:17:18,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:17:18,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:17:18,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:17:18,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:17:18,257 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:/tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-11-29 19:17:18,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:17:18,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:17:18,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:17:18,832 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:17:18,833 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:17:18,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-29 19:17:18,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/5cf217d1e/71bf123f75ce4b03a9654088882d30a5/FLAG0a2c1c958 [2020-11-29 19:17:19,841 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:17:19,842 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-29 19:17:19,887 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/5cf217d1e/71bf123f75ce4b03a9654088882d30a5/FLAG0a2c1c958 [2020-11-29 19:17:19,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/5cf217d1e/71bf123f75ce4b03a9654088882d30a5 [2020-11-29 19:17:19,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:17:19,991 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 19:17:19,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:17:19,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:17:19,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:17:20,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:17:19" (1/1) ... [2020-11-29 19:17:20,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e75c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20, skipping insertion in model container [2020-11-29 19:17:20,005 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:17:19" (1/1) ... [2020-11-29 19:17:20,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:17:20,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:17:20,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:17:20,514 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:17:20,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:17:20,726 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:17:20,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20 WrapperNode [2020-11-29 19:17:20,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:17:20,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:17:20,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:17:20,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:17:20,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... [2020-11-29 19:17:20,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:17:20,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:17:20,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:17:20,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:17:20,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:21,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 19:17:21,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:17:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 19:17:21,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 19:17:21,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 19:17:21,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 19:17:21,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 19:17:21,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 19:17:21,014 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-29 19:17:21,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 19:17:21,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 19:17:21,019 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 19:17:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-29 19:17:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-29 19:17:21,020 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 19:17:21,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:17:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 19:17:21,026 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 19:17:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 19:17:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 19:17:21,027 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 19:17:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 19:17:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 19:17:21,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 19:17:21,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 19:17:21,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 19:17:21,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 19:17:21,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 19:17:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 19:17:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 19:17:21,030 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 19:17:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 19:17:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 19:17:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 19:17:21,031 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 19:17:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 19:17:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 19:17:21,032 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 19:17:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 19:17:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 19:17:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 19:17:21,033 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 19:17:21,034 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 19:17:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 19:17:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 19:17:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 19:17:21,035 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 19:17:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 19:17:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 19:17:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 19:17:21,038 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 19:17:21,038 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 19:17:21,038 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 19:17:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 19:17:21,039 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 19:17:21,040 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 19:17:21,041 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 19:17:21,042 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 19:17:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 19:17:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 19:17:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 19:17:21,043 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 19:17:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 19:17:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 19:17:21,044 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 19:17:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 19:17:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 19:17:21,045 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 19:17:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 19:17:21,046 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 19:17:21,047 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 19:17:21,048 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 19:17:21,049 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 19:17:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 19:17:21,050 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 19:17:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 19:17:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 19:17:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 19:17:21,051 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 19:17:21,052 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 19:17:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 19:17:21,054 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 19:17:21,055 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 19:17:21,055 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 19:17:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 19:17:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 19:17:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 19:17:21,056 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 19:17:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 19:17:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 19:17:21,057 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 19:17:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 19:17:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 19:17:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 19:17:21,058 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 19:17:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 19:17:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 19:17:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 19:17:21,059 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 19:17:21,060 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 19:17:21,060 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 19:17:21,061 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 19:17:21,061 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 19:17:21,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 19:17:21,062 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 19:17:21,062 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 19:17:21,062 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 19:17:21,063 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 19:17:21,063 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 19:17:21,063 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 19:17:21,063 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 19:17:21,064 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 19:17:21,064 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 19:17:21,064 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 19:17:21,064 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 19:17:21,065 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 19:17:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 19:17:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 19:17:21,066 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 19:17:21,067 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 19:17:21,067 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 19:17:21,067 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 19:17:21,067 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 19:17:21,068 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-29 19:17:21,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 19:17:21,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 19:17:21,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:17:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 19:17:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:17:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 19:17:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 19:17:21,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:17:21,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:17:21,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:17:21,710 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-29 19:17:21,977 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:17:21,977 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 19:17:21,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:17:21 BoogieIcfgContainer [2020-11-29 19:17:21,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:17:21,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:17:21,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:17:21,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:17:21,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:17:19" (1/3) ... [2020-11-29 19:17:21,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c629cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:17:21, skipping insertion in model container [2020-11-29 19:17:22,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:20" (2/3) ... [2020-11-29 19:17:22,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c629cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:17:22, skipping insertion in model container [2020-11-29 19:17:22,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:17:21" (3/3) ... [2020-11-29 19:17:22,004 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-11-29 19:17:22,031 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:17:22,040 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-29 19:17:22,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-29 19:17:22,109 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:17:22,110 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 19:17:22,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:17:22,111 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:17:22,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:17:22,111 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:17:22,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:17:22,112 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:17:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-29 19:17:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:17:22,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:22,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:22,172 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]=== [2020-11-29 19:17:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash 691471212, now seen corresponding path program 1 times [2020-11-29 19:17:22,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:22,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717785692] [2020-11-29 19:17:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:22,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:22,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717785692] [2020-11-29 19:17:22,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:22,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:17:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163339000] [2020-11-29 19:17:22,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:17:22,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:22,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:17:22,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:17:22,698 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-11-29 19:17:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:22,924 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-11-29 19:17:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:17:22,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 19:17:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:22,956 INFO L225 Difference]: With dead ends: 51 [2020-11-29 19:17:22,970 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 19:17:22,973 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 [2020-11-29 19:17:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 19:17:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-11-29 19:17:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 19:17:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-29 19:17:23,036 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2020-11-29 19:17:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:23,037 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-29 19:17:23,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:17:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-29 19:17:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:17:23,038 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:23,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:23,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:17:23,040 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]=== [2020-11-29 19:17:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -39877821, now seen corresponding path program 1 times [2020-11-29 19:17:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:23,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282615872] [2020-11-29 19:17:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:23,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:23,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282615872] [2020-11-29 19:17:23,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:23,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:17:23,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31984828] [2020-11-29 19:17:23,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:17:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:17:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:17:23,280 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2020-11-29 19:17:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:23,566 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-11-29 19:17:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:17:23,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 19:17:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:23,570 INFO L225 Difference]: With dead ends: 41 [2020-11-29 19:17:23,570 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 19:17:23,571 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 [2020-11-29 19:17:23,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 19:17:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-11-29 19:17:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:17:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-11-29 19:17:23,582 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 10 [2020-11-29 19:17:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:23,583 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-11-29 19:17:23,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:17:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-11-29 19:17:23,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:17:23,584 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:23,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:23,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:17:23,585 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]=== [2020-11-29 19:17:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -39877820, now seen corresponding path program 1 times [2020-11-29 19:17:23,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:23,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20592557] [2020-11-29 19:17:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:23,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20592557] [2020-11-29 19:17:23,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:23,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:17:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306906202] [2020-11-29 19:17:23,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:17:23,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:17:23,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:17:23,796 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 4 states. [2020-11-29 19:17:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:23,983 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-11-29 19:17:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:17:23,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 19:17:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:23,986 INFO L225 Difference]: With dead ends: 39 [2020-11-29 19:17:23,986 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 19:17:23,987 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 [2020-11-29 19:17:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 19:17:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-11-29 19:17:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 19:17:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-11-29 19:17:23,996 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 10 [2020-11-29 19:17:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:23,997 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-11-29 19:17:23,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:17:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-11-29 19:17:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:17:23,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:23,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:24,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:17:24,000 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]=== [2020-11-29 19:17:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash -39879136, now seen corresponding path program 1 times [2020-11-29 19:17:24,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:24,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739685933] [2020-11-29 19:17:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:24,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:24,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739685933] [2020-11-29 19:17:24,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:24,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:17:24,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130272653] [2020-11-29 19:17:24,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:17:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:17:24,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:17:24,150 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 4 states. [2020-11-29 19:17:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:24,311 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 19:17:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:17:24,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 19:17:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:24,313 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:17:24,313 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 19:17:24,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:17:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 19:17:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-11-29 19:17:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:17:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-29 19:17:24,325 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2020-11-29 19:17:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:24,326 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-29 19:17:24,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:17:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-29 19:17:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:17:24,328 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:24,328 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:24,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:17:24,329 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]=== [2020-11-29 19:17:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:24,330 INFO L82 PathProgramCache]: Analyzing trace with hash -905845953, now seen corresponding path program 1 times [2020-11-29 19:17:24,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:24,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038344889] [2020-11-29 19:17:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:24,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038344889] [2020-11-29 19:17:24,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:24,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:17:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374326072] [2020-11-29 19:17:24,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:17:24,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:24,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:17:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:17:24,544 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 5 states. [2020-11-29 19:17:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:24,763 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-11-29 19:17:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:17:24,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 19:17:24,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:24,766 INFO L225 Difference]: With dead ends: 43 [2020-11-29 19:17:24,766 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 19:17:24,767 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 [2020-11-29 19:17:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 19:17:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-11-29 19:17:24,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 19:17:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 19:17:24,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 16 [2020-11-29 19:17:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:24,774 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 19:17:24,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:17:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 19:17:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:17:24,779 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:24,780 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:24,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:17:24,781 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]=== [2020-11-29 19:17:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash -905845910, now seen corresponding path program 1 times [2020-11-29 19:17:24,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:24,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144632500] [2020-11-29 19:17:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:24,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144632500] [2020-11-29 19:17:24,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:24,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:17:24,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667165736] [2020-11-29 19:17:24,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:17:24,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:17:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:17:24,965 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 5 states. [2020-11-29 19:17:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:25,164 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-11-29 19:17:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:17:25,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 19:17:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:25,166 INFO L225 Difference]: With dead ends: 35 [2020-11-29 19:17:25,166 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 19:17:25,167 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 [2020-11-29 19:17:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 19:17:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-11-29 19:17:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 19:17:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-29 19:17:25,172 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2020-11-29 19:17:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:25,173 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-29 19:17:25,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:17:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-29 19:17:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:17:25,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:25,174 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:25,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:17:25,174 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]=== [2020-11-29 19:17:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash -905845909, now seen corresponding path program 1 times [2020-11-29 19:17:25,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:25,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981028905] [2020-11-29 19:17:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:25,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:25,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981028905] [2020-11-29 19:17:25,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:25,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:17:25,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799513143] [2020-11-29 19:17:25,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:17:25,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:25,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:17:25,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:17:25,379 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-11-29 19:17:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:25,568 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-29 19:17:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:17:25,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 19:17:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:25,570 INFO L225 Difference]: With dead ends: 38 [2020-11-29 19:17:25,571 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 19:17:25,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:17:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 19:17:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-11-29 19:17:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 19:17:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-29 19:17:25,589 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2020-11-29 19:17:25,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:25,589 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-29 19:17:25,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:17:25,590 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-29 19:17:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:17:25,592 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:25,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:25,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 19:17:25,593 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]=== [2020-11-29 19:17:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1715336483, now seen corresponding path program 1 times [2020-11-29 19:17:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:25,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811205275] [2020-11-29 19:17:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:25,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:17:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:25,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811205275] [2020-11-29 19:17:25,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:25,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:17:25,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192294175] [2020-11-29 19:17:25,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:17:25,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:17:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:17:25,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:17:25,833 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-11-29 19:17:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:26,059 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-11-29 19:17:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:17:26,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-29 19:17:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:26,064 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:17:26,064 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 19:17:26,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:17:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 19:17:26,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-11-29 19:17:26,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 19:17:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-29 19:17:26,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 20 [2020-11-29 19:17:26,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:26,075 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-29 19:17:26,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:17:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-29 19:17:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:17:26,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:26,079 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] [2020-11-29 19:17:26,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 19:17:26,081 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]=== [2020-11-29 19:17:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1639972725, now seen corresponding path program 1 times [2020-11-29 19:17:26,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:17:26,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829869550] [2020-11-29 19:17:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:17:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:17:26,150 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:17:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:17:26,173 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:17:26,230 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:17:26,230 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:17:26,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 19:17:26,253 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-11-29 19:17:26,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:17:26 BoogieIcfgContainer [2020-11-29 19:17:26,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:17:26,275 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:17:26,276 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:17:26,276 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:17:26,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:17:21" (3/4) ... [2020-11-29 19:17:26,282 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:17:26,282 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:17:26,300 INFO L168 Benchmark]: Toolchain (without parser) took 6300.27 ms. Allocated memory was 96.5 MB in the beginning and 155.2 MB in the end (delta: 58.7 MB). Free memory was 73.3 MB in the beginning and 102.7 MB in the end (delta: -29.4 MB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:26,304 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 96.5 MB. Free memory was 72.2 MB in the beginning and 72.2 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:17:26,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 737.91 ms. Allocated memory is still 96.5 MB. Free memory was 72.9 MB in the beginning and 51.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:26,307 INFO L168 Benchmark]: Boogie Preprocessor took 162.21 ms. Allocated memory is still 96.5 MB. Free memory was 51.7 MB in the beginning and 49.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:26,309 INFO L168 Benchmark]: RCFGBuilder took 1084.90 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 49.0 MB in the beginning and 72.7 MB in the end (delta: -23.7 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:26,311 INFO L168 Benchmark]: TraceAbstraction took 4290.01 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 72.7 MB in the beginning and 102.7 MB in the end (delta: -30.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:17:26,313 INFO L168 Benchmark]: Witness Printer took 13.98 ms. Allocated memory is still 155.2 MB. Free memory is still 102.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:17:26,318 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 96.5 MB. Free memory was 72.2 MB in the beginning and 72.2 MB in the end (delta: 65.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 737.91 ms. Allocated memory is still 96.5 MB. Free memory was 72.9 MB in the beginning and 51.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 162.21 ms. Allocated memory is still 96.5 MB. Free memory was 51.7 MB in the beginning and 49.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1084.90 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 49.0 MB in the beginning and 72.7 MB in the end (delta: -23.7 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4290.01 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 72.7 MB in the beginning and 102.7 MB in the end (delta: -30.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 13.98 ms. Allocated memory is still 155.2 MB. Free memory is still 102.7 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: 4.1s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 1.8s, 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, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 47 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s 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-a4ecdab [2020-11-29 19:17:30,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:17:30,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:17:30,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:17:30,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:17:30,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:17:30,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:17:30,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:17:30,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:17:30,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:17:30,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:17:30,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:17:30,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:17:30,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:17:30,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:17:30,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:17:30,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:17:30,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:17:30,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:17:30,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:17:30,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:17:30,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:17:30,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:17:30,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:17:30,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:17:30,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:17:30,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:17:30,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:17:30,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:17:30,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:17:30,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:17:30,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:17:30,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:17:30,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:17:30,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:17:30,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:17:30,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:17:30,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:17:30,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:17:30,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:17:30,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:17:30,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-11-29 19:17:30,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:17:30,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:17:30,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:17:30,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:17:30,523 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:17:30,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:17:30,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:17:30,524 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:17:30,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:17:30,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:17:30,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:17:30,526 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 19:17:30,526 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 19:17:30,526 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 19:17:30,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:17:30,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 19:17:30,530 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:17:30,530 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:17:30,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:17:30,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:17:30,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:17:30,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:17:30,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:17:30,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:17:30,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:17:30,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:17:30,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:17:30,534 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:17:30,536 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:17:30,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:17:30,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:17:30,536 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:/tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-11-29 19:17:31,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:17:31,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:17:31,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:17:31,216 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:17:31,220 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:17:31,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-29 19:17:31,342 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/7357764c0/c3438aaffe974948899a25ae8ffffc8d/FLAG3b080674c [2020-11-29 19:17:32,256 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:17:32,258 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-29 19:17:32,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/7357764c0/c3438aaffe974948899a25ae8ffffc8d/FLAG3b080674c [2020-11-29 19:17:32,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/data/7357764c0/c3438aaffe974948899a25ae8ffffc8d [2020-11-29 19:17:32,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:17:32,478 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 19:17:32,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:17:32,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:17:32,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:17:32,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:17:32" (1/1) ... [2020-11-29 19:17:32,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a95e6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:32, skipping insertion in model container [2020-11-29 19:17:32,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:17:32" (1/1) ... [2020-11-29 19:17:32,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:17:32,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:17:33,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:17:33,244 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:17:33,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:17:33,425 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:17:33,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33 WrapperNode [2020-11-29 19:17:33,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:17:33,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:17:33,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:17:33,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:17:33,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... [2020-11-29 19:17:33,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:17:33,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:17:33,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:17:33,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:17:33,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:33,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 19:17:33,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:17:33,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-11-29 19:17:33,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 19:17:33,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 19:17:33,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 19:17:33,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 19:17:33,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 19:17:33,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 19:17:33,756 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-29 19:17:33,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 19:17:33,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 19:17:33,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 19:17:33,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-29 19:17:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-29 19:17:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 19:17:33,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:17:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 19:17:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 19:17:33,760 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 19:17:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 19:17:33,775 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 19:17:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 19:17:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 19:17:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 19:17:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 19:17:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 19:17:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 19:17:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 19:17:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 19:17:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 19:17:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 19:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 19:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 19:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 19:17:33,780 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 19:17:33,780 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 19:17:33,780 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 19:17:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 19:17:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 19:17:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 19:17:33,781 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 19:17:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 19:17:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 19:17:33,782 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 19:17:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 19:17:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 19:17:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 19:17:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 19:17:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 19:17:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 19:17:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 19:17:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 19:17:33,788 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 19:17:33,788 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 19:17:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 19:17:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 19:17:33,789 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 19:17:33,790 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 19:17:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 19:17:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 19:17:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 19:17:33,791 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 19:17:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 19:17:33,792 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 19:17:33,793 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 19:17:33,793 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 19:17:33,794 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 19:17:33,795 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 19:17:33,796 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 19:17:33,796 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 19:17:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 19:17:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 19:17:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 19:17:33,797 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 19:17:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 19:17:33,798 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 19:17:33,799 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 19:17:33,799 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 19:17:33,799 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 19:17:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 19:17:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 19:17:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 19:17:33,800 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 19:17:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 19:17:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 19:17:33,801 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 19:17:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 19:17:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 19:17:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 19:17:33,802 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 19:17:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 19:17:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 19:17:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 19:17:33,803 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 19:17:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 19:17:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 19:17:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 19:17:33,804 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 19:17:33,805 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 19:17:33,805 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 19:17:33,805 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 19:17:33,805 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 19:17:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 19:17:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 19:17:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 19:17:33,806 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 19:17:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 19:17:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 19:17:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 19:17:33,807 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 19:17:33,808 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 19:17:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 19:17:33,809 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 19:17:33,810 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 19:17:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 19:17:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 19:17:33,811 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 19:17:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 19:17:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 19:17:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 19:17:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 19:17:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 19:17:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 19:17:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-29 19:17:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 19:17:33,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 19:17:33,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-29 19:17:33,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 19:17:33,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 19:17:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 19:17:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 19:17:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:17:33,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:17:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-11-29 19:17:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-11-29 19:17:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-11-29 19:17:33,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:17:34,840 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-29 19:17:35,135 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:17:35,135 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 19:17:35,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:17:35 BoogieIcfgContainer [2020-11-29 19:17:35,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:17:35,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:17:35,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:17:35,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:17:35,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:17:32" (1/3) ... [2020-11-29 19:17:35,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1235d353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:17:35, skipping insertion in model container [2020-11-29 19:17:35,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:17:33" (2/3) ... [2020-11-29 19:17:35,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1235d353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:17:35, skipping insertion in model container [2020-11-29 19:17:35,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:17:35" (3/3) ... [2020-11-29 19:17:35,151 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-11-29 19:17:35,171 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:17:35,182 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-29 19:17:35,205 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-29 19:17:35,239 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:17:35,239 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 19:17:35,239 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:17:35,239 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:17:35,240 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:17:35,240 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:17:35,240 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:17:35,240 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:17:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-29 19:17:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:17:35,275 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:35,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:35,277 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]=== [2020-11-29 19:17:35,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:35,303 INFO L82 PathProgramCache]: Analyzing trace with hash -251734950, now seen corresponding path program 1 times [2020-11-29 19:17:35,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:35,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502200808] [2020-11-29 19:17:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-29 19:17:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:35,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:35,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502200808] [2020-11-29 19:17:35,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:35,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 19:17:35,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789117410] [2020-11-29 19:17:35,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:17:35,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:17:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:17:35,844 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-11-29 19:17:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:35,874 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-29 19:17:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:17:35,876 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-29 19:17:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:35,904 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:17:35,904 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 19:17:35,906 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 [2020-11-29 19:17:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 19:17:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-29 19:17:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 19:17:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 19:17:35,967 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 9 [2020-11-29 19:17:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:35,968 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 19:17:35,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:17:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 19:17:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:17:35,971 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:35,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:36,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:17:36,192 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]=== [2020-11-29 19:17:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -251735570, now seen corresponding path program 1 times [2020-11-29 19:17:36,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079225383] [2020-11-29 19:17:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:17:36,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:36,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:36,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079225383] [2020-11-29 19:17:36,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:36,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 19:17:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366624196] [2020-11-29 19:17:36,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:17:36,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:36,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:17:36,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:17:36,595 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 3 states. [2020-11-29 19:17:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:36,719 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-11-29 19:17:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:17:36,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 19:17:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:36,723 INFO L225 Difference]: With dead ends: 42 [2020-11-29 19:17:36,724 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 19:17:36,724 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 [2020-11-29 19:17:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 19:17:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-11-29 19:17:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:17:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-11-29 19:17:36,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2020-11-29 19:17:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:36,738 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-11-29 19:17:36,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:17:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-11-29 19:17:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:17:36,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:36,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:36,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:17:36,963 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]=== [2020-11-29 19:17:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash -251735527, now seen corresponding path program 1 times [2020-11-29 19:17:36,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:36,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530739341] [2020-11-29 19:17:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:37,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:17:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:37,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:37,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530739341] [2020-11-29 19:17:37,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:37,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-29 19:17:37,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365430575] [2020-11-29 19:17:37,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:17:37,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:37,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:17:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:17:37,295 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 3 states. [2020-11-29 19:17:37,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:37,392 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-29 19:17:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:17:37,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 19:17:37,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:37,395 INFO L225 Difference]: With dead ends: 40 [2020-11-29 19:17:37,395 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 19:17:37,396 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 [2020-11-29 19:17:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 19:17:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-11-29 19:17:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 19:17:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-11-29 19:17:37,409 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 9 [2020-11-29 19:17:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:37,411 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-11-29 19:17:37,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:17:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-11-29 19:17:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:17:37,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:37,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:37,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 19:17:37,630 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]=== [2020-11-29 19:17:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash -251734212, now seen corresponding path program 1 times [2020-11-29 19:17:37,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:37,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255638393] [2020-11-29 19:17:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:17:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:37,957 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 [2020-11-29 19:17:37,958 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:37,967 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:37,968 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:37,968 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 19:17:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:37,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:38,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255638393] [2020-11-29 19:17:38,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:38,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-29 19:17:38,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727533901] [2020-11-29 19:17:38,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:17:38,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:38,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:17:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:17:38,009 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 3 states. [2020-11-29 19:17:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:38,134 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-29 19:17:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:17:38,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-29 19:17:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:38,139 INFO L225 Difference]: With dead ends: 29 [2020-11-29 19:17:38,139 INFO L226 Difference]: Without dead ends: 29 [2020-11-29 19:17:38,140 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 [2020-11-29 19:17:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-29 19:17:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-29 19:17:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-29 19:17:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-29 19:17:38,151 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2020-11-29 19:17:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:38,152 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-29 19:17:38,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:17:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-29 19:17:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 19:17:38,154 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:38,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:38,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 19:17:38,373 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]=== [2020-11-29 19:17:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash -251734211, now seen corresponding path program 1 times [2020-11-29 19:17:38,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:38,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087169787] [2020-11-29 19:17:38,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:17:38,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:38,673 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 [2020-11-29 19:17:38,674 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:38,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:38,685 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:38,685 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 19:17:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:38,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:38,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087169787] [2020-11-29 19:17:38,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:38,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-11-29 19:17:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817649577] [2020-11-29 19:17:38,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:17:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:17:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:17:38,796 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 4 states. [2020-11-29 19:17:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:38,925 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-29 19:17:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:17:38,927 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-29 19:17:38,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:38,928 INFO L225 Difference]: With dead ends: 27 [2020-11-29 19:17:38,928 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 19:17:38,929 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 [2020-11-29 19:17:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 19:17:38,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 19:17:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 19:17:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 19:17:38,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2020-11-29 19:17:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:38,936 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 19:17:38,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:17:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-29 19:17:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:17:38,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:38,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:39,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 19:17:39,151 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]=== [2020-11-29 19:17:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128460, now seen corresponding path program 1 times [2020-11-29 19:17:39,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:39,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601804484] [2020-11-29 19:17:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:17:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:39,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:39,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601804484] [2020-11-29 19:17:39,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:39,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-29 19:17:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21277578] [2020-11-29 19:17:39,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:17:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:17:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:17:39,474 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2020-11-29 19:17:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:39,683 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-11-29 19:17:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:17:39,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 19:17:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:39,686 INFO L225 Difference]: With dead ends: 41 [2020-11-29 19:17:39,687 INFO L226 Difference]: Without dead ends: 41 [2020-11-29 19:17:39,687 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 [2020-11-29 19:17:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-29 19:17:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2020-11-29 19:17:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:17:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-29 19:17:39,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 14 [2020-11-29 19:17:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:39,697 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-29 19:17:39,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:17:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-29 19:17:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:17:39,698 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:39,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:39,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 19:17:39,905 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]=== [2020-11-29 19:17:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128503, now seen corresponding path program 1 times [2020-11-29 19:17:39,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:39,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655728790] [2020-11-29 19:17:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:17:40,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:40,203 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 [2020-11-29 19:17:40,203 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:40,210 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:40,210 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:40,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 19:17:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:40,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:40,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655728790] [2020-11-29 19:17:40,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:40,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-29 19:17:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883894333] [2020-11-29 19:17:40,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:17:40,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:40,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:17:40,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:17:40,288 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-11-29 19:17:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:40,561 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-11-29 19:17:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:17:40,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-29 19:17:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:40,564 INFO L225 Difference]: With dead ends: 33 [2020-11-29 19:17:40,564 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 19:17:40,565 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 [2020-11-29 19:17:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 19:17:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-29 19:17:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:17:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-29 19:17:40,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2020-11-29 19:17:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:40,575 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 19:17:40,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:17:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-29 19:17:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:17:40,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:40,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:40,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 19:17:40,793 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]=== [2020-11-29 19:17:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:40,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128504, now seen corresponding path program 1 times [2020-11-29 19:17:40,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:40,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228925702] [2020-11-29 19:17:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:41,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:17:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:41,135 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 [2020-11-29 19:17:41,136 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:41,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:41,149 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:41,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 19:17:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:41,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:41,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228925702] [2020-11-29 19:17:41,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:41,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-29 19:17:41,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612295415] [2020-11-29 19:17:41,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:17:41,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:41,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:17:41,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:17:41,396 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-11-29 19:17:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:41,794 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-29 19:17:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:17:41,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-29 19:17:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:41,801 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:17:41,801 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 19:17:41,802 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 [2020-11-29 19:17:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 19:17:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-11-29 19:17:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 19:17:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-29 19:17:41,811 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 14 [2020-11-29 19:17:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:41,819 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-29 19:17:41,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:17:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-29 19:17:41,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:17:41,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:41,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:42,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 19:17:42,039 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]=== [2020-11-29 19:17:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1674350128, now seen corresponding path program 1 times [2020-11-29 19:17:42,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:42,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120761874] [2020-11-29 19:17:42,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:17:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:17:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:17:42,340 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 [2020-11-29 19:17:42,341 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:42,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:42,347 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:42,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-29 19:17:42,431 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 19:17:42,432 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 [2020-11-29 19:17:42,433 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:42,439 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:42,439 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:42,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2020-11-29 19:17:42,484 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 [2020-11-29 19:17:42,487 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:17:42,492 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:42,493 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:17:42,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-11-29 19:17:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:42,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:17:42,578 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 19:17:42,584 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:17:42,586 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 19:17:42,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2020-11-29 19:17:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:17:42,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120761874] [2020-11-29 19:17:42,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:17:42,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 19:17:42,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792794881] [2020-11-29 19:17:42,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:17:42,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:17:42,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:17:42,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:17:42,628 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-11-29 19:17:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:17:42,978 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-29 19:17:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:17:42,980 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-29 19:17:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:17:42,982 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:17:42,982 INFO L226 Difference]: Without dead ends: 34 [2020-11-29 19:17:42,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:17:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-29 19:17:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-11-29 19:17:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 19:17:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-29 19:17:43,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2020-11-29 19:17:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:17:43,002 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-29 19:17:43,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:17:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-29 19:17:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:17:43,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:17:43,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:17:43,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-29 19:17:43,219 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]=== [2020-11-29 19:17:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:17:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash -361076259, now seen corresponding path program 1 times [2020-11-29 19:17:43,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:17:43,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589802457] [2020-11-29 19:17:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61df2a40-299e-4b46-8551-e4773892e077/bin/uautomizer/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 [2020-11-29 19:17:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:17:43,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:17:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:17:43,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:17:43,556 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:17:43,556 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:17:43,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-11-29 19:17:43,799 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-11-29 19:17:43,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:17:43 BoogieIcfgContainer [2020-11-29 19:17:43,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:17:43,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:17:43,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:17:43,822 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:17:43,823 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:17:35" (3/4) ... [2020-11-29 19:17:43,828 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:17:43,829 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:17:43,831 INFO L168 Benchmark]: Toolchain (without parser) took 11352.25 ms. Allocated memory was 60.8 MB in the beginning and 125.8 MB in the end (delta: 65.0 MB). Free memory was 39.0 MB in the beginning and 51.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:43,832 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 60.8 MB. Free memory is still 42.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:17:43,833 INFO L168 Benchmark]: CACSL2BoogieTranslator took 945.67 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 32.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:43,834 INFO L168 Benchmark]: Boogie Preprocessor took 188.40 ms. Allocated memory is still 60.8 MB. Free memory was 32.4 MB in the beginning and 29.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:43,835 INFO L168 Benchmark]: RCFGBuilder took 1517.89 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 29.6 MB in the beginning and 53.9 MB in the end (delta: -24.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:43,836 INFO L168 Benchmark]: TraceAbstraction took 8679.29 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 53.1 MB in the beginning and 52.3 MB in the end (delta: 842.3 kB). Peak memory consumption was 40.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:17:43,837 INFO L168 Benchmark]: Witness Printer took 7.96 ms. Allocated memory is still 125.8 MB. Free memory was 52.3 MB in the beginning and 51.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:17:43,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 60.8 MB. Free memory is still 42.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 945.67 ms. Allocated memory is still 60.8 MB. Free memory was 38.8 MB in the beginning and 32.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 188.40 ms. Allocated memory is still 60.8 MB. Free memory was 32.4 MB in the beginning and 29.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1517.89 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 29.6 MB in the beginning and 53.9 MB in the end (delta: -24.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8679.29 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 53.1 MB in the beginning and 52.3 MB in the end (delta: 842.3 kB). Peak memory consumption was 40.1 MB. Max. memory is 16.1 GB. * Witness Printer took 7.96 ms. Allocated memory is still 125.8 MB. Free memory was 52.3 MB in the beginning and 51.2 MB in the end (delta: 1.0 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 11 procedures, 61 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.5s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 1.8s, 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, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 41 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.2s 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...