./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext.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_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 0539ac658883b1641a4574e23a99ec21471d0b6a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 0539ac658883b1641a4574e23a99ec21471d0b6a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 19:05:20,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:05:20,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:05:20,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:05:20,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:05:20,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:05:20,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:05:20,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:05:20,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:05:20,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:05:20,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:05:20,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:05:20,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:05:20,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:05:20,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:05:20,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:05:20,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:05:20,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:05:20,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:05:20,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:05:20,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:05:20,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:05:20,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:05:20,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:05:20,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:05:20,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:05:20,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:05:20,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:05:20,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:05:20,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:05:20,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:05:20,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:05:20,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:05:20,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:05:20,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:05:20,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:05:20,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:05:20,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:05:20,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:05:20,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:05:20,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:05:20,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 19:05:20,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:05:20,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:05:20,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:05:20,899 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:05:20,899 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:05:20,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:05:20,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:05:20,900 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:05:20,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:05:20,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:05:20,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:05:20,903 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 19:05:20,903 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 19:05:20,903 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 19:05:20,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:05:20,904 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 19:05:20,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:05:20,904 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:05:20,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:05:20,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:05:20,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:05:20,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:05:20,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:05:20,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:05:20,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:05:20,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:05:20,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:05:20,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:05:20,908 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_a7faaac4-6987-4748-821a-57e4beb3450e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0539ac658883b1641a4574e23a99ec21471d0b6a [2020-11-29 19:05:21,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:05:21,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:05:21,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:05:21,276 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:05:21,277 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:05:21,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/list-ext.i [2020-11-29 19:05:21,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/9f47aaa21/afa29446cfda4a70a14adc85b99d1b48/FLAGef7f8ed94 [2020-11-29 19:05:22,102 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:05:22,102 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/sv-benchmarks/c/list-ext-properties/list-ext.i [2020-11-29 19:05:22,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/9f47aaa21/afa29446cfda4a70a14adc85b99d1b48/FLAGef7f8ed94 [2020-11-29 19:05:22,375 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/9f47aaa21/afa29446cfda4a70a14adc85b99d1b48 [2020-11-29 19:05:22,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:05:22,379 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 19:05:22,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:05:22,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:05:22,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:05:22,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:22,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec0b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22, skipping insertion in model container [2020-11-29 19:05:22,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:22,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:05:22,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:05:22,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:05:22,811 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:05:22,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:05:22,979 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:05:22,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22 WrapperNode [2020-11-29 19:05:22,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:05:22,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:05:22,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:05:22,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:05:22,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... [2020-11-29 19:05:23,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:05:23,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:05:23,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:05:23,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:05:23,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 19:05:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:05:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 19:05:23,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 19:05:23,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 19:05:23,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 19:05:23,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 19:05:23,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 19:05:23,189 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-29 19:05:23,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 19:05:23,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 19:05:23,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 19:05:23,190 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-29 19:05:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-29 19:05:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 19:05:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:05:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 19:05:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 19:05:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 19:05:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 19:05:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 19:05:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 19:05:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 19:05:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 19:05:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 19:05:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 19:05:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 19:05:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 19:05:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 19:05:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 19:05:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 19:05:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 19:05:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 19:05:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 19:05:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 19:05:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 19:05:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 19:05:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 19:05:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 19:05:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 19:05:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 19:05:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 19:05:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 19:05:23,196 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 19:05:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 19:05:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 19:05:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 19:05:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 19:05:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 19:05:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 19:05:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 19:05:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 19:05:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 19:05:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 19:05:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 19:05:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 19:05:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 19:05:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 19:05:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 19:05:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 19:05:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 19:05:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 19:05:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 19:05:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 19:05:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 19:05:23,200 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 19:05:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 19:05:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 19:05:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 19:05:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 19:05:23,201 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 19:05:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 19:05:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 19:05:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 19:05:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 19:05:23,202 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 19:05:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 19:05:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 19:05:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 19:05:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 19:05:23,203 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 19:05:23,204 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 19:05:23,204 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 19:05:23,204 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 19:05:23,204 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 19:05:23,204 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 19:05:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 19:05:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 19:05:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 19:05:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 19:05:23,205 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 19:05:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 19:05:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 19:05:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 19:05:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 19:05:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 19:05:23,206 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 19:05:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 19:05:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 19:05:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 19:05:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 19:05:23,207 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 19:05:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 19:05:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 19:05:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 19:05:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 19:05:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 19:05:23,208 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 19:05:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 19:05:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 19:05:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 19:05:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 19:05:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 19:05:23,209 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 19:05:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 19:05:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 19:05:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 19:05:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 19:05:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 19:05:23,210 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 19:05:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 19:05:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 19:05:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 19:05:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-29 19:05:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 19:05:23,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 19:05:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:05:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 19:05:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 19:05:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:05:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:05:23,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 19:05:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:05:23,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:05:23,658 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-29 19:05:24,201 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:05:24,202 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 19:05:24,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:05:24 BoogieIcfgContainer [2020-11-29 19:05:24,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:05:24,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:05:24,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:05:24,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:05:24,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:05:22" (1/3) ... [2020-11-29 19:05:24,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9750a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:05:24, skipping insertion in model container [2020-11-29 19:05:24,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:22" (2/3) ... [2020-11-29 19:05:24,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9750a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:05:24, skipping insertion in model container [2020-11-29 19:05:24,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:05:24" (3/3) ... [2020-11-29 19:05:24,214 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext.i [2020-11-29 19:05:24,231 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:05:24,236 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 38 error locations. [2020-11-29 19:05:24,253 INFO L253 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2020-11-29 19:05:24,301 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:05:24,301 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 19:05:24,301 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:05:24,301 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:05:24,302 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:05:24,302 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:05:24,302 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:05:24,302 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:05:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states. [2020-11-29 19:05:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 19:05:24,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:24,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:24,331 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:24,338 INFO L82 PathProgramCache]: Analyzing trace with hash -849411233, now seen corresponding path program 1 times [2020-11-29 19:05:24,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:24,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565079641] [2020-11-29 19:05:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:24,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:24,626 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 19:05:24,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565079641] [2020-11-29 19:05:24,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:24,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 19:05:24,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430475193] [2020-11-29 19:05:24,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 19:05:24,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:05:24,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:05:24,658 INFO L87 Difference]: Start difference. First operand 103 states. Second operand 3 states. [2020-11-29 19:05:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:24,969 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2020-11-29 19:05:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:05:24,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 19:05:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:24,986 INFO L225 Difference]: With dead ends: 100 [2020-11-29 19:05:24,986 INFO L226 Difference]: Without dead ends: 92 [2020-11-29 19:05:24,989 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 19:05:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-29 19:05:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-11-29 19:05:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-29 19:05:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2020-11-29 19:05:25,065 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 11 [2020-11-29 19:05:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:25,066 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2020-11-29 19:05:25,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 19:05:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2020-11-29 19:05:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:05:25,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:25,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:25,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:05:25,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash -562931253, now seen corresponding path program 1 times [2020-11-29 19:05:25,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127707013] [2020-11-29 19:05:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:25,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:25,276 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 19:05:25,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127707013] [2020-11-29 19:05:25,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:25,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:05:25,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554445022] [2020-11-29 19:05:25,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:05:25,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:05:25,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:05:25,280 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand 5 states. [2020-11-29 19:05:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:25,645 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-11-29 19:05:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:05:25,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 19:05:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:25,648 INFO L225 Difference]: With dead ends: 113 [2020-11-29 19:05:25,648 INFO L226 Difference]: Without dead ends: 113 [2020-11-29 19:05:25,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 19:05:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-29 19:05:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2020-11-29 19:05:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 19:05:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-11-29 19:05:25,661 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 12 [2020-11-29 19:05:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:25,661 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-11-29 19:05:25,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:05:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-11-29 19:05:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:05:25,662 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:25,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:25,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:05:25,663 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash -562931252, now seen corresponding path program 1 times [2020-11-29 19:05:25,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:25,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926747602] [2020-11-29 19:05:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:25,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:25,789 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 19:05:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926747602] [2020-11-29 19:05:25,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:25,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:05:25,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786242510] [2020-11-29 19:05:25,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:05:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:25,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:05:25,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:05:25,792 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 5 states. [2020-11-29 19:05:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:26,190 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-11-29 19:05:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:05:26,190 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 19:05:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:26,193 INFO L225 Difference]: With dead ends: 129 [2020-11-29 19:05:26,194 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 19:05:26,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 19:05:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 19:05:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2020-11-29 19:05:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-29 19:05:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2020-11-29 19:05:26,219 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 12 [2020-11-29 19:05:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:26,220 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2020-11-29 19:05:26,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:05:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2020-11-29 19:05:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:05:26,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:26,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:26,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:05:26,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:26,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1567887182, now seen corresponding path program 1 times [2020-11-29 19:05:26,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:26,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531364200] [2020-11-29 19:05:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:26,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:05:26,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531364200] [2020-11-29 19:05:26,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:26,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:05:26,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702053807] [2020-11-29 19:05:26,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:05:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:05:26,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:05:26,408 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand 7 states. [2020-11-29 19:05:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:27,065 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2020-11-29 19:05:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:05:27,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-29 19:05:27,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:27,068 INFO L225 Difference]: With dead ends: 157 [2020-11-29 19:05:27,068 INFO L226 Difference]: Without dead ends: 157 [2020-11-29 19:05:27,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:05:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-29 19:05:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 117. [2020-11-29 19:05:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-11-29 19:05:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2020-11-29 19:05:27,080 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 21 [2020-11-29 19:05:27,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:27,080 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2020-11-29 19:05:27,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:05:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2020-11-29 19:05:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 19:05:27,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:27,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:27,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:05:27,083 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:27,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1567887181, now seen corresponding path program 1 times [2020-11-29 19:05:27,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:27,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791764465] [2020-11-29 19:05:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:27,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:05:27,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791764465] [2020-11-29 19:05:27,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:27,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:05:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127930947] [2020-11-29 19:05:27,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:05:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:05:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:05:27,301 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand 7 states. [2020-11-29 19:05:27,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:27,937 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2020-11-29 19:05:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:05:27,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-29 19:05:27,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:27,939 INFO L225 Difference]: With dead ends: 160 [2020-11-29 19:05:27,939 INFO L226 Difference]: Without dead ends: 160 [2020-11-29 19:05:27,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:05:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-29 19:05:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 101. [2020-11-29 19:05:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-29 19:05:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-11-29 19:05:27,947 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 21 [2020-11-29 19:05:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:27,948 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-11-29 19:05:27,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:05:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-11-29 19:05:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:05:27,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:27,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:27,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:05:27,950 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:27,950 INFO L82 PathProgramCache]: Analyzing trace with hash -517016407, now seen corresponding path program 1 times [2020-11-29 19:05:27,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:27,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404576775] [2020-11-29 19:05:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:28,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:28,111 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 19:05:28,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404576775] [2020-11-29 19:05:28,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:28,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 19:05:28,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899102553] [2020-11-29 19:05:28,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:05:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:05:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:05:28,114 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 8 states. [2020-11-29 19:05:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:28,516 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2020-11-29 19:05:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:05:28,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-29 19:05:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:28,519 INFO L225 Difference]: With dead ends: 190 [2020-11-29 19:05:28,519 INFO L226 Difference]: Without dead ends: 190 [2020-11-29 19:05:28,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:05:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-29 19:05:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2020-11-29 19:05:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 19:05:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-11-29 19:05:28,536 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 22 [2020-11-29 19:05:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:28,537 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-11-29 19:05:28,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:05:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-11-29 19:05:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:05:28,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:28,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:28,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:05:28,548 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1315861814, now seen corresponding path program 1 times [2020-11-29 19:05:28,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:28,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804304461] [2020-11-29 19:05:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:28,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:28,707 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 19:05:28,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804304461] [2020-11-29 19:05:28,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:28,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 19:05:28,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57248377] [2020-11-29 19:05:28,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:05:28,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:05:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:05:28,712 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 8 states. [2020-11-29 19:05:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:29,139 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2020-11-29 19:05:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:05:29,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-11-29 19:05:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:29,141 INFO L225 Difference]: With dead ends: 176 [2020-11-29 19:05:29,141 INFO L226 Difference]: Without dead ends: 176 [2020-11-29 19:05:29,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:05:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-11-29 19:05:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 114. [2020-11-29 19:05:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-29 19:05:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2020-11-29 19:05:29,151 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 24 [2020-11-29 19:05:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:29,151 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2020-11-29 19:05:29,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:05:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2020-11-29 19:05:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:05:29,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:29,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:29,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 19:05:29,164 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1990956336, now seen corresponding path program 1 times [2020-11-29 19:05:29,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:29,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997182335] [2020-11-29 19:05:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:29,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:05:29,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997182335] [2020-11-29 19:05:29,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:29,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:05:29,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125487866] [2020-11-29 19:05:29,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:05:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:05:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:05:29,343 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand 7 states. [2020-11-29 19:05:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:29,806 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2020-11-29 19:05:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:05:29,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-29 19:05:29,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:29,808 INFO L225 Difference]: With dead ends: 129 [2020-11-29 19:05:29,808 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 19:05:29,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:05:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 19:05:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2020-11-29 19:05:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 19:05:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-11-29 19:05:29,815 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 24 [2020-11-29 19:05:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:29,816 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-11-29 19:05:29,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:05:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-11-29 19:05:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 19:05:29,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:29,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:29,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 19:05:29,818 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:29,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:29,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1990956337, now seen corresponding path program 1 times [2020-11-29 19:05:29,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:29,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551929940] [2020-11-29 19:05:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:29,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 19:05:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:05:29,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551929940] [2020-11-29 19:05:29,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:29,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 19:05:29,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060966340] [2020-11-29 19:05:29,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:05:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:05:29,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:05:29,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:05:29,970 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 7 states. [2020-11-29 19:05:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:30,545 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2020-11-29 19:05:30,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:05:30,546 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-29 19:05:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:30,547 INFO L225 Difference]: With dead ends: 127 [2020-11-29 19:05:30,547 INFO L226 Difference]: Without dead ends: 127 [2020-11-29 19:05:30,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:05:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-29 19:05:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2020-11-29 19:05:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 19:05:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2020-11-29 19:05:30,552 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 24 [2020-11-29 19:05:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:30,552 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2020-11-29 19:05:30,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:05:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2020-11-29 19:05:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 19:05:30,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:30,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:30,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 19:05:30,554 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1772362976, now seen corresponding path program 1 times [2020-11-29 19:05:30,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:05:30,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461450724] [2020-11-29 19:05:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:05:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:05:30,591 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:05:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:05:30,613 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:05:30,648 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:05:30,648 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:05:30,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 19:05:30,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:05:30 BoogieIcfgContainer [2020-11-29 19:05:30,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:05:30,694 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:05:30,695 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:05:30,695 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:05:30,695 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:05:24" (3/4) ... [2020-11-29 19:05:30,699 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:05:30,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:05:30,701 INFO L168 Benchmark]: Toolchain (without parser) took 8321.53 ms. Allocated memory was 90.2 MB in the beginning and 163.6 MB in the end (delta: 73.4 MB). Free memory was 57.3 MB in the beginning and 78.5 MB in the end (delta: -21.3 MB). Peak memory consumption was 52.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:30,702 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 90.2 MB. Free memory was 47.4 MB in the beginning and 47.4 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:05:30,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 601.70 ms. Allocated memory is still 90.2 MB. Free memory was 57.1 MB in the beginning and 54.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:30,704 INFO L168 Benchmark]: Boogie Preprocessor took 114.86 ms. Allocated memory is still 90.2 MB. Free memory was 54.3 MB in the beginning and 51.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:30,704 INFO L168 Benchmark]: RCFGBuilder took 1105.78 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 51.5 MB in the beginning and 54.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:30,705 INFO L168 Benchmark]: TraceAbstraction took 6488.20 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 53.5 MB in the beginning and 79.6 MB in the end (delta: -26.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:30,706 INFO L168 Benchmark]: Witness Printer took 4.90 ms. Allocated memory is still 163.6 MB. Free memory was 79.6 MB in the beginning and 78.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:30,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 90.2 MB. Free memory was 47.4 MB in the beginning and 47.4 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 601.70 ms. Allocated memory is still 90.2 MB. Free memory was 57.1 MB in the beginning and 54.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 114.86 ms. Allocated memory is still 90.2 MB. Free memory was 54.3 MB in the beginning and 51.5 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1105.78 ms. Allocated memory was 90.2 MB in the beginning and 113.2 MB in the end (delta: 23.1 MB). Free memory was 51.5 MB in the beginning and 54.0 MB in the end (delta: -2.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6488.20 ms. Allocated memory was 113.2 MB in the beginning and 163.6 MB in the end (delta: 50.3 MB). Free memory was 53.5 MB in the beginning and 79.6 MB in the end (delta: -26.1 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * Witness Printer took 4.90 ms. Allocated memory is still 163.6 MB. Free memory was 79.6 MB in the beginning and 78.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L532] int i = 0; [L533] int y = 0; [L534] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, y=0] [L535] COND FALSE !(a == 0) VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, y=0] [L536] List t; [L537] List p = a; VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, y=0] [L538] i < 10 && __VERIFIER_nondet_int() [L538] i < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, i < 10 && __VERIFIER_nondet_int()=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, y=0] [L538] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L546] y < 10 && __VERIFIER_nondet_int() [L546] y < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, y=0, y < 10 && __VERIFIER_nondet_int()=0] [L546] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L554] p->h = 3 VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, y=0] [L555] p->n = 0 VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, y=0] [L556] i = 0 [L557] y = 0 [L558] p = a VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, y=0] [L559] EXPR p->h VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=3, y=0] [L559] COND FALSE !(p->h == 1) [L563] EXPR p->h VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=3, y=0] [L563] COND FALSE !(p->h == 2) [L567] EXPR p->h VAL [a={-1:0}, i=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=3, y=0] [L567] COND TRUE p->h != 3 || (i + y) < 20 [L568] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-ext.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 119 locations, 38 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.3s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 637 SDtfs, 920 SDslu, 1186 SDs, 0 SdLazy, 2627 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=4, 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, 322 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 197 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 16064 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 16/16 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 19:05:33,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:05:33,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:05:33,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:05:33,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:05:33,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:05:33,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:05:33,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:05:33,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:05:33,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:05:33,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:05:33,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:05:33,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:05:33,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:05:33,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:05:33,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:05:33,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:05:33,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:05:33,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:05:33,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:05:33,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:05:33,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:05:33,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:05:33,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:05:33,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:05:33,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:05:33,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:05:33,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:05:33,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:05:33,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:05:33,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:05:33,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:05:33,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:05:33,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:05:33,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:05:33,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:05:33,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:05:33,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:05:33,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:05:33,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:05:33,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:05:33,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-11-29 19:05:33,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:05:33,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:05:33,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:05:33,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:05:33,641 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:05:33,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:05:33,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:05:33,642 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:05:33,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:05:33,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:05:33,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:05:33,643 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 19:05:33,643 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 19:05:33,643 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 19:05:33,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:05:33,644 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 19:05:33,644 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-29 19:05:33,644 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-29 19:05:33,644 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:05:33,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:05:33,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:05:33,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:05:33,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:05:33,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:05:33,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:05:33,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:05:33,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:05:33,647 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-29 19:05:33,647 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-29 19:05:33,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:05:33,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-29 19:05:33,648 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_a7faaac4-6987-4748-821a-57e4beb3450e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0539ac658883b1641a4574e23a99ec21471d0b6a [2020-11-29 19:05:34,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:05:34,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:05:34,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:05:34,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:05:34,109 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:05:34,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/list-ext.i [2020-11-29 19:05:34,189 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/2263a196c/10f324d2724b44e5a4138c8b31570423/FLAG3cd1c04f5 [2020-11-29 19:05:34,894 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:05:34,894 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/sv-benchmarks/c/list-ext-properties/list-ext.i [2020-11-29 19:05:34,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/2263a196c/10f324d2724b44e5a4138c8b31570423/FLAG3cd1c04f5 [2020-11-29 19:05:35,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/bin/uautomizer/data/2263a196c/10f324d2724b44e5a4138c8b31570423 [2020-11-29 19:05:35,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:05:35,212 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 19:05:35,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:05:35,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:05:35,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:05:35,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:05:35" (1/1) ... [2020-11-29 19:05:35,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67fef29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:35, skipping insertion in model container [2020-11-29 19:05:35,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:05:35" (1/1) ... [2020-11-29 19:05:35,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:05:35,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:05:35,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:05:35,863 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:05:35,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:05:36,015 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:05:36,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36 WrapperNode [2020-11-29 19:05:36,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:05:36,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:05:36,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:05:36,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:05:36,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,075 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... [2020-11-29 19:05:36,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:05:36,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:05:36,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:05:36,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:05:36,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:36,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 19:05:36,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:05:36,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-11-29 19:05:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-29 19:05:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 19:05:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 19:05:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 19:05:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 19:05:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 19:05:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-29 19:05:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 19:05:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 19:05:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-29 19:05:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-29 19:05:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-29 19:05:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-29 19:05:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:05:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 19:05:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 19:05:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 19:05:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 19:05:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 19:05:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 19:05:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 19:05:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 19:05:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 19:05:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 19:05:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 19:05:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 19:05:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 19:05:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 19:05:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 19:05:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 19:05:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 19:05:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 19:05:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 19:05:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 19:05:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 19:05:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 19:05:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 19:05:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 19:05:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 19:05:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 19:05:36,256 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 19:05:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 19:05:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 19:05:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 19:05:36,257 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 19:05:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 19:05:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 19:05:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 19:05:36,258 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 19:05:36,259 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 19:05:36,259 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 19:05:36,259 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 19:05:36,259 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 19:05:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 19:05:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 19:05:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 19:05:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 19:05:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 19:05:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 19:05:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 19:05:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 19:05:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 19:05:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 19:05:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 19:05:36,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 19:05:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 19:05:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 19:05:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 19:05:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 19:05:36,263 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 19:05:36,264 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 19:05:36,264 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 19:05:36,264 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 19:05:36,264 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 19:05:36,265 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 19:05:36,265 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 19:05:36,265 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 19:05:36,265 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 19:05:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 19:05:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 19:05:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 19:05:36,266 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 19:05:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 19:05:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 19:05:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 19:05:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 19:05:36,267 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 19:05:36,268 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 19:05:36,268 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 19:05:36,268 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 19:05:36,268 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 19:05:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 19:05:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 19:05:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 19:05:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 19:05:36,269 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 19:05:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 19:05:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 19:05:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 19:05:36,270 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 19:05:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 19:05:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 19:05:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 19:05:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 19:05:36,271 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 19:05:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 19:05:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 19:05:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 19:05:36,272 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 19:05:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 19:05:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 19:05:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 19:05:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 19:05:36,273 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 19:05:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 19:05:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 19:05:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 19:05:36,274 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 19:05:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 19:05:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 19:05:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 19:05:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-29 19:05:36,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 19:05:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 19:05:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-29 19:05:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 19:05:36,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 19:05:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-29 19:05:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:05:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 19:05:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-29 19:05:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:05:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-11-29 19:05:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-11-29 19:05:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-11-29 19:05:36,863 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-29 19:05:37,658 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:05:37,658 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 19:05:37,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:05:37 BoogieIcfgContainer [2020-11-29 19:05:37,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:05:37,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:05:37,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:05:37,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:05:37,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:05:35" (1/3) ... [2020-11-29 19:05:37,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3b3ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:05:37, skipping insertion in model container [2020-11-29 19:05:37,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:05:36" (2/3) ... [2020-11-29 19:05:37,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e3b3ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:05:37, skipping insertion in model container [2020-11-29 19:05:37,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:05:37" (3/3) ... [2020-11-29 19:05:37,671 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext.i [2020-11-29 19:05:37,683 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:05:37,699 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 38 error locations. [2020-11-29 19:05:37,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2020-11-29 19:05:37,733 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:05:37,733 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 19:05:37,733 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:05:37,734 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:05:37,734 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:05:37,734 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:05:37,734 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:05:37,734 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:05:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states. [2020-11-29 19:05:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:05:37,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:37,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:37,761 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:37,767 INFO L82 PathProgramCache]: Analyzing trace with hash -243684713, now seen corresponding path program 1 times [2020-11-29 19:05:37,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:37,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098386760] [2020-11-29 19:05:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:05:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:38,155 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 19:05:38,156 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:38,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:38,179 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:38,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 19:05:38,227 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 19:05:38,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:38,387 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 19:05:38,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098386760] [2020-11-29 19:05:38,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:38,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-29 19:05:38,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801016012] [2020-11-29 19:05:38,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:05:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:38,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:05:38,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:05:38,420 INFO L87 Difference]: Start difference. First operand 99 states. Second operand 6 states. [2020-11-29 19:05:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:39,674 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2020-11-29 19:05:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:05:39,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 19:05:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:39,693 INFO L225 Difference]: With dead ends: 160 [2020-11-29 19:05:39,694 INFO L226 Difference]: Without dead ends: 149 [2020-11-29 19:05:39,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 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 19:05:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-29 19:05:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2020-11-29 19:05:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-29 19:05:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-11-29 19:05:39,774 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 138 transitions. Word has length 10 [2020-11-29 19:05:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:39,775 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-11-29 19:05:39,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:05:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 138 transitions. [2020-11-29 19:05:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 19:05:39,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:39,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:39,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-29 19:05:39,985 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:39,986 INFO L82 PathProgramCache]: Analyzing trace with hash -243684714, now seen corresponding path program 1 times [2020-11-29 19:05:39,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:39,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150759620] [2020-11-29 19:05:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:40,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 19:05:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:40,178 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 19:05:40,179 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:40,181 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:40,181 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:40,182 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 19:05:40,199 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 19:05:40,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:40,220 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 19:05:40,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150759620] [2020-11-29 19:05:40,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:40,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-29 19:05:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714321178] [2020-11-29 19:05:40,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:05:40,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:05:40,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:05:40,224 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. Second operand 4 states. [2020-11-29 19:05:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:40,631 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2020-11-29 19:05:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:05:40,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 19:05:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:40,633 INFO L225 Difference]: With dead ends: 109 [2020-11-29 19:05:40,633 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 19:05:40,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 19:05:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 19:05:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2020-11-29 19:05:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-29 19:05:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2020-11-29 19:05:40,643 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 10 [2020-11-29 19:05:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:40,644 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2020-11-29 19:05:40,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:05:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2020-11-29 19:05:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:05:40,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:40,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:40,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-29 19:05:40,858 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:40,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash 235389844, now seen corresponding path program 1 times [2020-11-29 19:05:40,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:40,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581460915] [2020-11-29 19:05:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:05:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:41,068 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 19:05:41,069 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,075 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:41,076 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 19:05:41,103 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 13 treesize of output 9 [2020-11-29 19:05:41,104 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:41,128 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 13 treesize of output 9 [2020-11-29 19:05:41,129 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:41,143 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,144 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2020-11-29 19:05:41,198 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 19 treesize of output 7 [2020-11-29 19:05:41,198 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:41,222 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 21 treesize of output 9 [2020-11-29 19:05:41,223 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,233 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:41,233 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:41,233 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2020-11-29 19:05:41,296 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 19:05:41,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:41,595 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 19:05:41,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581460915] [2020-11-29 19:05:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:41,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-29 19:05:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363032765] [2020-11-29 19:05:41,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:05:41,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:41,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:05:41,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:05:41,597 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand 10 states. [2020-11-29 19:05:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:43,867 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2020-11-29 19:05:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:05:43,868 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-11-29 19:05:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:43,870 INFO L225 Difference]: With dead ends: 149 [2020-11-29 19:05:43,870 INFO L226 Difference]: Without dead ends: 149 [2020-11-29 19:05:43,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:05:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-29 19:05:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2020-11-29 19:05:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 19:05:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-11-29 19:05:43,879 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 17 [2020-11-29 19:05:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:43,880 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-11-29 19:05:43,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:05:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-11-29 19:05:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:05:43,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:43,881 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:44,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-29 19:05:44,082 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash 235389843, now seen corresponding path program 1 times [2020-11-29 19:05:44,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:44,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867625792] [2020-11-29 19:05:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:05:44,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:44,306 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 19:05:44,307 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:44,315 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:44,315 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:44,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 19:05:44,327 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 13 treesize of output 9 [2020-11-29 19:05:44,328 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:44,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:44,337 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:44,337 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:13 [2020-11-29 19:05:44,384 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 23 treesize of output 11 [2020-11-29 19:05:44,385 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:44,388 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:44,388 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 19:05:44,388 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-11-29 19:05:44,415 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 19:05:44,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:44,443 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 19:05:44,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867625792] [2020-11-29 19:05:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:44,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 19:05:44,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139123430] [2020-11-29 19:05:44,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:05:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:05:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:05:44,446 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 6 states. [2020-11-29 19:05:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:45,155 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-11-29 19:05:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:05:45,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-29 19:05:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:45,160 INFO L225 Difference]: With dead ends: 135 [2020-11-29 19:05:45,160 INFO L226 Difference]: Without dead ends: 135 [2020-11-29 19:05:45,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:05:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-29 19:05:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2020-11-29 19:05:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-29 19:05:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2020-11-29 19:05:45,180 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 17 [2020-11-29 19:05:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:45,186 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2020-11-29 19:05:45,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:05:45,187 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2020-11-29 19:05:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:05:45,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:45,188 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 19:05:45,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-29 19:05:45,389 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:45,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1387471408, now seen corresponding path program 1 times [2020-11-29 19:05:45,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:45,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168747798] [2020-11-29 19:05:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:45,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:05:45,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:45,625 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 19:05:45,625 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:45,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:45,634 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:45,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-11-29 19:05:45,698 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 19:05:45,698 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 29 treesize of output 13 [2020-11-29 19:05:45,699 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:45,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:45,708 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:45,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:9 [2020-11-29 19:05:45,743 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 19:05:45,744 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:45,747 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:45,747 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 19:05:45,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-11-29 19:05:45,771 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 19:05:45,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:45,832 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 19:05:45,847 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:45,848 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 19:05:45,848 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:18 [2020-11-29 19:05:45,911 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 160 treesize of output 152 [2020-11-29 19:05:45,918 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 19:05:46,010 INFO L625 ElimStorePlain]: treesize reduction 107, result has 22.5 percent of original size [2020-11-29 19:05:46,012 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-29 19:05:46,012 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:24 [2020-11-29 19:05:46,027 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 19:05:46,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168747798] [2020-11-29 19:05:46,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2020-11-29 19:05:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911022536] [2020-11-29 19:05:46,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:05:46,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:05:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:05:46,030 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand 11 states. [2020-11-29 19:05:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:47,117 INFO L93 Difference]: Finished difference Result 191 states and 206 transitions. [2020-11-29 19:05:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:05:47,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-11-29 19:05:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:47,119 INFO L225 Difference]: With dead ends: 191 [2020-11-29 19:05:47,119 INFO L226 Difference]: Without dead ends: 191 [2020-11-29 19:05:47,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:05:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-11-29 19:05:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 100. [2020-11-29 19:05:47,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 19:05:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-11-29 19:05:47,130 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 18 [2020-11-29 19:05:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:47,131 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-11-29 19:05:47,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:05:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-11-29 19:05:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:05:47,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:47,132 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 19:05:47,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-29 19:05:47,346 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash 2130023316, now seen corresponding path program 1 times [2020-11-29 19:05:47,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:47,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011918304] [2020-11-29 19:05:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:05:47,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:47,529 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 19:05:47,530 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:47,532 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:47,533 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:47,533 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 19:05:47,550 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 13 treesize of output 9 [2020-11-29 19:05:47,551 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:47,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:47,568 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:47,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:13 [2020-11-29 19:05:47,593 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 23 treesize of output 11 [2020-11-29 19:05:47,594 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:47,599 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:47,599 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 19:05:47,599 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-11-29 19:05:47,625 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 19:05:47,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:47,650 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 19:05:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011918304] [2020-11-29 19:05:47,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:47,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-29 19:05:47,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706468468] [2020-11-29 19:05:47,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:05:47,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:47,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:05:47,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:05:47,653 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 6 states. [2020-11-29 19:05:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:48,354 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-11-29 19:05:48,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:05:48,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-29 19:05:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:48,356 INFO L225 Difference]: With dead ends: 124 [2020-11-29 19:05:48,356 INFO L226 Difference]: Without dead ends: 124 [2020-11-29 19:05:48,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:05:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-29 19:05:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2020-11-29 19:05:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-29 19:05:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-11-29 19:05:48,364 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 18 [2020-11-29 19:05:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:48,372 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-11-29 19:05:48,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:05:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-11-29 19:05:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 19:05:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:48,373 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 19:05:48,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-29 19:05:48,575 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:48,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2130023317, now seen corresponding path program 1 times [2020-11-29 19:05:48,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:48,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984560406] [2020-11-29 19:05:48,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:48,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:05:48,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:48,763 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 19:05:48,763 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:48,770 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,770 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 19:05:48,798 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 13 treesize of output 9 [2020-11-29 19:05:48,798 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,813 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:48,818 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 13 treesize of output 9 [2020-11-29 19:05:48,818 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,830 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:48,831 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,831 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2020-11-29 19:05:48,883 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 19 treesize of output 7 [2020-11-29 19:05:48,884 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,898 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:48,901 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 21 treesize of output 9 [2020-11-29 19:05:48,902 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,908 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:48,908 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:48,908 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2020-11-29 19:05:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:05:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:49,204 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 19:05:49,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984560406] [2020-11-29 19:05:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-29 19:05:49,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687890929] [2020-11-29 19:05:49,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 19:05:49,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 19:05:49,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:05:49,206 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 10 states. [2020-11-29 19:05:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:51,176 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2020-11-29 19:05:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 19:05:51,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-29 19:05:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:51,178 INFO L225 Difference]: With dead ends: 123 [2020-11-29 19:05:51,178 INFO L226 Difference]: Without dead ends: 123 [2020-11-29 19:05:51,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-11-29 19:05:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-29 19:05:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2020-11-29 19:05:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 19:05:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-11-29 19:05:51,185 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 18 [2020-11-29 19:05:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:51,185 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-11-29 19:05:51,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 19:05:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-11-29 19:05:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 19:05:51,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:51,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:51,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-29 19:05:51,393 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1872584189, now seen corresponding path program 1 times [2020-11-29 19:05:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:51,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626569924] [2020-11-29 19:05:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:05:51,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:05:51,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:05:51,633 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 19:05:51,634 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:51,646 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:51,646 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:51,647 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-11-29 19:05:51,684 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-29 19:05:51,684 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 29 treesize of output 13 [2020-11-29 19:05:51,684 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:51,687 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:51,688 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 19:05:51,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:9 [2020-11-29 19:05:51,723 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 19:05:51,724 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 19:05:51,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:51,727 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 19:05:51,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-11-29 19:05:51,739 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 19:05:51,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-29 19:05:51,825 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 19:05:51,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 19:05:51,833 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 19:05:51,834 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2020-11-29 19:05:51,880 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 160 treesize of output 152 [2020-11-29 19:05:51,883 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 19:05:52,036 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2020-11-29 19:05:52,038 INFO L625 ElimStorePlain]: treesize reduction 107, result has 22.5 percent of original size [2020-11-29 19:05:52,043 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-29 19:05:52,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:24 [2020-11-29 19:05:52,060 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 19:05:52,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626569924] [2020-11-29 19:05:52,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:05:52,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2020-11-29 19:05:52,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570912875] [2020-11-29 19:05:52,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 19:05:52,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-29 19:05:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 19:05:52,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 19:05:52,062 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 11 states. [2020-11-29 19:05:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:05:53,025 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-11-29 19:05:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 19:05:53,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-11-29 19:05:53,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:05:53,027 INFO L225 Difference]: With dead ends: 159 [2020-11-29 19:05:53,027 INFO L226 Difference]: Without dead ends: 159 [2020-11-29 19:05:53,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-11-29 19:05:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-29 19:05:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 87. [2020-11-29 19:05:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-29 19:05:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2020-11-29 19:05:53,033 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 20 [2020-11-29 19:05:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:05:53,034 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2020-11-29 19:05:53,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 19:05:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2020-11-29 19:05:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 19:05:53,035 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:05:53,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:05:53,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-29 19:05:53,249 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr33ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr31ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr36ENSURES_VIOLATIONMEMORY_LEAK, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr32ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr30ASSERT_VIOLATIONMEMORY_FREE, mainErr12REQUIRES_VIOLATION]=== [2020-11-29 19:05:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:05:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash -88346649, now seen corresponding path program 1 times [2020-11-29 19:05:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-29 19:05:53,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080789835] [2020-11-29 19:05:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a7faaac4-6987-4748-821a-57e4beb3450e/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 19:05:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:05:53,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:05:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:05:53,504 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:05:53,554 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-29 19:05:53,554 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:05:53,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-29 19:05:53,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:05:53 BoogieIcfgContainer [2020-11-29 19:05:53,788 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:05:53,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:05:53,789 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:05:53,789 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:05:53,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:05:37" (3/4) ... [2020-11-29 19:05:53,794 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:05:53,794 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:05:53,795 INFO L168 Benchmark]: Toolchain (without parser) took 18582.89 ms. Allocated memory was 54.5 MB in the beginning and 134.2 MB in the end (delta: 79.7 MB). Free memory was 30.0 MB in the beginning and 39.6 MB in the end (delta: -9.5 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:53,796 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 36.6 MB in the end (delta: 22.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:05:53,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 800.37 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 29.8 MB in the beginning and 36.7 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:53,797 INFO L168 Benchmark]: Boogie Preprocessor took 133.65 ms. Allocated memory is still 67.1 MB. Free memory was 36.7 MB in the beginning and 33.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:53,798 INFO L168 Benchmark]: RCFGBuilder took 1494.52 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 28.1 MB in the end (delta: 21.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:53,798 INFO L168 Benchmark]: TraceAbstraction took 16125.31 ms. Allocated memory was 67.1 MB in the beginning and 134.2 MB in the end (delta: 67.1 MB). Free memory was 27.7 MB in the beginning and 39.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 54.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:05:53,799 INFO L168 Benchmark]: Witness Printer took 4.94 ms. Allocated memory is still 134.2 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:05:53,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 54.5 MB. Free memory was 36.6 MB in the beginning and 36.6 MB in the end (delta: 22.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 800.37 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 29.8 MB in the beginning and 36.7 MB in the end (delta: -6.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 133.65 ms. Allocated memory is still 67.1 MB. Free memory was 36.7 MB in the beginning and 33.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1494.52 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 28.1 MB in the end (delta: 21.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16125.31 ms. Allocated memory was 67.1 MB in the beginning and 134.2 MB in the end (delta: 67.1 MB). Free memory was 27.7 MB in the beginning and 39.6 MB in the end (delta: -11.8 MB). Peak memory consumption was 54.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.94 ms. Allocated memory is still 134.2 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 12. Possible FailurePath: [L532] int i = 0; [L533] int y = 0; [L534] List a = (List) malloc(sizeof(struct node)); VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, y=0] [L535] COND FALSE !(a == 0) VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, y=0] [L536] List t; [L537] List p = a; VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, y=0] [L538] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L546] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L554] p->h = 3 VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, y=0] [L555] p->n = 0 VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, y=0] [L556] i = 0 [L557] y = 0 [L558] p = a VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, y=0] [L559] EXPR p->h VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3, y=0] [L559] COND FALSE !(p->h == 1) [L563] EXPR p->h VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3, y=0] [L563] COND FALSE !(p->h == 2) [L567] EXPR p->h VAL [a={1:0}, i=0, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3, y=0] [L567] COND TRUE p->h != 3 || (i + y) < 20 [L568] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list-ext.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 121 locations, 38 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.0s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 9.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 467 SDtfs, 1123 SDslu, 1399 SDs, 0 SdLazy, 2199 SolverSat, 211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 282 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=1, 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, 360 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 150 NumberOfCodeBlocks, 150 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 240 ConstructedInterpolants, 2 QuantifiedInterpolants, 17364 SizeOfPredicates, 62 NumberOfNonLiveVariables, 740 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 16/16 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...