./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G --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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:18:19,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:18:19,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:18:19,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:18:19,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:18:19,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:18:19,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:18:19,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:18:19,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:18:19,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:18:19,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:18:19,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:18:19,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:18:19,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:18:19,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:18:19,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:18:19,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:18:19,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:18:19,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:18:19,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:18:19,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:18:19,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:18:19,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:18:19,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:18:19,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:18:19,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:18:19,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:18:19,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:18:19,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:18:19,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:18:19,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:18:19,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:18:19,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:18:19,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:18:19,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:18:19,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:18:19,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:18:19,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:18:19,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:18:19,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:18:19,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:18:19,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:18:20,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:18:20,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:18:20,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:18:20,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:18:20,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:18:20,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:18:20,028 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:18:20,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:18:20,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:18:20,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:18:20,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:18:20,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:18:20,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:18:20,030 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:18:20,030 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:18:20,030 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:18:20,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:18:20,031 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:18:20,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:18:20,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:18:20,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:18:20,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:18:20,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:18:20,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:18:20,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:18:20,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:18:20,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:18:20,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:18:20,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:18:20,034 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_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-11-23 12:18:20,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:18:20,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:18:20,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:18:20,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:18:20,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:18:20,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-11-23 12:18:20,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/data/e6c476050/e999932ace594a208fb0fc201b62735b/FLAG7117a9f38 [2021-11-23 12:18:21,221 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:18:21,223 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-11-23 12:18:21,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/data/e6c476050/e999932ace594a208fb0fc201b62735b/FLAG7117a9f38 [2021-11-23 12:18:21,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/data/e6c476050/e999932ace594a208fb0fc201b62735b [2021-11-23 12:18:21,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:18:21,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:18:21,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:18:21,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:18:21,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:18:21,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:18:21" (1/1) ... [2021-11-23 12:18:21,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60932181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:21, skipping insertion in model container [2021-11-23 12:18:21,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:18:21" (1/1) ... [2021-11-23 12:18:21,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:18:21,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:18:21,875 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-11-23 12:18:21,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:18:21,933 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:18:21,953 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-11-23 12:18:21,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:18:22,004 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:18:22,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22 WrapperNode [2021-11-23 12:18:22,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:18:22,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:18:22,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:18:22,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:18:22,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,087 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-23 12:18:22,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:18:22,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:18:22,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:18:22,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:18:22,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:18:22,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:18:22,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:18:22,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:18:22,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (1/1) ... [2021-11-23 12:18:22,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:18:22,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:22,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:18:22,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:18:22,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:18:22,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:18:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-23 12:18:22,254 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-23 12:18:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 12:18:22,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:18:22,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:18:22,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:18:22,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:18:22,391 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:18:22,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:18:22,743 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:18:22,751 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:18:22,752 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 12:18:22,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:18:22 BoogieIcfgContainer [2021-11-23 12:18:22,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:18:22,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:18:22,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:18:22,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:18:22,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:18:21" (1/3) ... [2021-11-23 12:18:22,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12453a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:18:22, skipping insertion in model container [2021-11-23 12:18:22,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:18:22" (2/3) ... [2021-11-23 12:18:22,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12453a5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:18:22, skipping insertion in model container [2021-11-23 12:18:22,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:18:22" (3/3) ... [2021-11-23 12:18:22,770 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-11-23 12:18:22,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:18:22,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-23 12:18:22,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:18:22,863 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:18:22,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-23 12:18:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 12:18:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:18:22,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:22,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:22,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1208402706, now seen corresponding path program 1 times [2021-11-23 12:18:22,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:22,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639454337] [2021-11-23 12:18:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:22,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:23,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:23,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639454337] [2021-11-23 12:18:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639454337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:23,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:23,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:18:23,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214053355] [2021-11-23 12:18:23,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:23,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:18:23,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:18:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:18:23,234 INFO L87 Difference]: Start difference. First operand has 48 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:23,264 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-11-23 12:18:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:18:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:18:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:23,278 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:18:23,278 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 12:18:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:18:23,287 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:23,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 12:18:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-23 12:18:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 12:18:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-11-23 12:18:23,347 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 10 [2021-11-23 12:18:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:23,349 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-11-23 12:18:23,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-11-23 12:18:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:18:23,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:23,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:23,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:18:23,354 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2017749332, now seen corresponding path program 1 times [2021-11-23 12:18:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:23,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974019858] [2021-11-23 12:18:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:23,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:23,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:23,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974019858] [2021-11-23 12:18:23,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974019858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:23,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:23,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:18:23,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965149146] [2021-11-23 12:18:23,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:23,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:18:23,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:18:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:23,575 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:23,745 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2021-11-23 12:18:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:18:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:18:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:23,751 INFO L225 Difference]: With dead ends: 97 [2021-11-23 12:18:23,751 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 12:18:23,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:18:23,754 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 95 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:23,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 160 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 12:18:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2021-11-23 12:18:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.565217391304348) internal successors, (72), 60 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-23 12:18:23,803 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 10 [2021-11-23 12:18:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:23,804 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-23 12:18:23,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-23 12:18:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:18:23,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:23,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:23,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:18:23,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1874284186, now seen corresponding path program 1 times [2021-11-23 12:18:23,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:23,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052197836] [2021-11-23 12:18:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:23,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:23,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:23,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052197836] [2021-11-23 12:18:23,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052197836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:23,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:23,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:18:23,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074209325] [2021-11-23 12:18:23,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:23,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:18:23,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:23,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:18:23,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:18:23,947 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:24,123 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-23 12:18:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:18:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:18:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:24,126 INFO L225 Difference]: With dead ends: 61 [2021-11-23 12:18:24,126 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 12:18:24,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:18:24,129 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:24,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 74 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 12:18:24,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-23 12:18:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 55 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-23 12:18:24,150 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 11 [2021-11-23 12:18:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-23 12:18:24,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-23 12:18:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:18:24,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:24,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:24,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:18:24,153 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1874284187, now seen corresponding path program 1 times [2021-11-23 12:18:24,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:24,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064417043] [2021-11-23 12:18:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:24,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:24,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064417043] [2021-11-23 12:18:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064417043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:24,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:24,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:18:24,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477836392] [2021-11-23 12:18:24,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:24,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:18:24,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:18:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:18:24,368 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:24,752 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-23 12:18:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:18:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:18:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:24,755 INFO L225 Difference]: With dead ends: 82 [2021-11-23 12:18:24,756 INFO L226 Difference]: Without dead ends: 82 [2021-11-23 12:18:24,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:18:24,758 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 74 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:24,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 145 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:18:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-23 12:18:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2021-11-23 12:18:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.326086956521739) internal successors, (61), 54 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-11-23 12:18:24,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 11 [2021-11-23 12:18:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:24,773 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-11-23 12:18:24,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-11-23 12:18:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 12:18:24,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:24,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:24,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:18:24,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2026732366, now seen corresponding path program 1 times [2021-11-23 12:18:24,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:24,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482207554] [2021-11-23 12:18:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:24,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:25,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482207554] [2021-11-23 12:18:25,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482207554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:25,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:25,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 12:18:25,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306949217] [2021-11-23 12:18:25,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:25,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:18:25,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:18:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:18:25,016 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:25,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:25,373 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-11-23 12:18:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:18:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 12:18:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:25,383 INFO L225 Difference]: With dead ends: 79 [2021-11-23 12:18:25,383 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 12:18:25,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:18:25,390 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:25,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 175 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:18:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 12:18:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2021-11-23 12:18:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 54 states have internal predecessors, (60), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-23 12:18:25,416 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 12 [2021-11-23 12:18:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:25,417 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-23 12:18:25,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-23 12:18:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 12:18:25,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:25,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:25,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:18:25,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1606237858, now seen corresponding path program 1 times [2021-11-23 12:18:25,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:25,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995740594] [2021-11-23 12:18:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:25,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:25,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-23 12:18:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:25,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:25,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995740594] [2021-11-23 12:18:25,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995740594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:25,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:18:25,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087658777] [2021-11-23 12:18:25,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:25,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:18:25,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:18:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:18:25,542 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:25,587 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-23 12:18:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:18:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-23 12:18:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:25,591 INFO L225 Difference]: With dead ends: 59 [2021-11-23 12:18:25,592 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 12:18:25,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:25,596 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:25,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 12:18:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 12:18:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 53 states have internal predecessors, (59), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-11-23 12:18:25,609 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 13 [2021-11-23 12:18:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:25,610 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-11-23 12:18:25,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-11-23 12:18:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 12:18:25,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:25,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:25,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:18:25,612 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1701323845, now seen corresponding path program 1 times [2021-11-23 12:18:25,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:25,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120283949] [2021-11-23 12:18:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:25,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-23 12:18:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:25,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120283949] [2021-11-23 12:18:25,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120283949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:25,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:18:25,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:18:25,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579548258] [2021-11-23 12:18:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:25,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:18:25,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:18:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:18:25,846 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:25,941 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-11-23 12:18:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:18:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-23 12:18:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:25,943 INFO L225 Difference]: With dead ends: 58 [2021-11-23 12:18:25,943 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 12:18:25,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:18:25,945 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:25,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:18:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 12:18:25,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-23 12:18:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 48 states have internal predecessors, (54), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-23 12:18:25,954 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 15 [2021-11-23 12:18:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:25,954 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-23 12:18:25,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-23 12:18:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:18:25,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:25,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:25,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:18:25,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1097581558, now seen corresponding path program 1 times [2021-11-23 12:18:25,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:25,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437662096] [2021-11-23 12:18:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:25,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:26,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:26,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437662096] [2021-11-23 12:18:26,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437662096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122308012] [2021-11-23 12:18:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:26,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:26,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:26,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:18:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:18:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:26,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:26,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122308012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:26,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:26,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-11-23 12:18:26,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191145167] [2021-11-23 12:18:26,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:26,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 12:18:26,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 12:18:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:18:26,964 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:27,271 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-23 12:18:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:18:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 12:18:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:27,275 INFO L225 Difference]: With dead ends: 74 [2021-11-23 12:18:27,278 INFO L226 Difference]: Without dead ends: 74 [2021-11-23 12:18:27,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:18:27,283 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 284 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:27,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 186 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:18:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-23 12:18:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2021-11-23 12:18:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.3) internal successors, (52), 46 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-23 12:18:27,297 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 18 [2021-11-23 12:18:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:27,297 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-23 12:18:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-23 12:18:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:18:27,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:27,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:27,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 12:18:27,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 12:18:27,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash -334706031, now seen corresponding path program 1 times [2021-11-23 12:18:27,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:27,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147462515] [2021-11-23 12:18:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:27,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:27,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147462515] [2021-11-23 12:18:27,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147462515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:27,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830293827] [2021-11-23 12:18:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:27,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:27,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:27,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:18:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 12:18:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:27,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 12:18:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:28,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:29,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830293827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:29,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:29,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2021-11-23 12:18:29,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122113512] [2021-11-23 12:18:29,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:29,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 12:18:29,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 12:18:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-23 12:18:29,164 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 22 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:29,933 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-11-23 12:18:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:18:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 12:18:29,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:29,936 INFO L225 Difference]: With dead ends: 89 [2021-11-23 12:18:29,936 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 12:18:29,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-11-23 12:18:29,938 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 457 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:29,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 270 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:18:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 12:18:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2021-11-23 12:18:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.275) internal successors, (51), 45 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-23 12:18:29,947 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 19 [2021-11-23 12:18:29,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:29,948 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-23 12:18:29,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.388888888888889) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-23 12:18:29,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 12:18:29,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:29,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:29,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:30,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:18:30,168 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1785952388, now seen corresponding path program 1 times [2021-11-23 12:18:30,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:30,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688194422] [2021-11-23 12:18:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:30,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:30,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688194422] [2021-11-23 12:18:30,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688194422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:30,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715149384] [2021-11-23 12:18:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:30,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:30,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:30,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:30,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:18:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 12:18:30,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:30,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 12:18:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:31,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715149384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:31,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:31,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 21 [2021-11-23 12:18:31,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134021670] [2021-11-23 12:18:31,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:31,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 12:18:31,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 12:18:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-11-23 12:18:31,726 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:32,608 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-11-23 12:18:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:18:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 12:18:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:32,610 INFO L225 Difference]: With dead ends: 86 [2021-11-23 12:18:32,610 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 12:18:32,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-11-23 12:18:32,612 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 324 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 373 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 12:18:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 12:18:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 29. [2021-11-23 12:18:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-23 12:18:32,619 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2021-11-23 12:18:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-23 12:18:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-23 12:18:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:18:32,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:32,622 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:32,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:32,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 12:18:32,842 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1620051070, now seen corresponding path program 1 times [2021-11-23 12:18:32,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:32,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770531962] [2021-11-23 12:18:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:32,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-23 12:18:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:32,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770531962] [2021-11-23 12:18:32,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770531962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:32,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741754012] [2021-11-23 12:18:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:32,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:32,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:32,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:32,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:18:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:18:33,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:33,059 INFO L388 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 7 treesize of output 6 [2021-11-23 12:18:33,165 INFO L388 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 29 treesize of output 23 [2021-11-23 12:18:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:33,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:18:33,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741754012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:18:33,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:18:33,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-23 12:18:33,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93351706] [2021-11-23 12:18:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:18:33,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:18:33,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:18:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:18:33,234 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:33,315 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-11-23 12:18:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:18:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-23 12:18:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:33,317 INFO L225 Difference]: With dead ends: 38 [2021-11-23 12:18:33,317 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 12:18:33,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:18:33,319 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:33,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 148 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-11-23 12:18:33,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 12:18:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 12:18:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-23 12:18:33,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 22 [2021-11-23 12:18:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:33,325 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-23 12:18:33,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 12:18:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-23 12:18:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:18:33,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:33,329 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:33,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:33,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:33,542 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2013078080, now seen corresponding path program 1 times [2021-11-23 12:18:33,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:33,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536354957] [2021-11-23 12:18:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:33,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-23 12:18:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:33,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536354957] [2021-11-23 12:18:33,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536354957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588349486] [2021-11-23 12:18:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:33,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:33,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:33,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:18:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:33,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 12:18:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:34,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 37 treesize of output 33 [2021-11-23 12:18:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:34,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588349486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:34,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:34,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-11-23 12:18:34,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847661890] [2021-11-23 12:18:34,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:34,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 12:18:34,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 12:18:34,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-23 12:18:34,662 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 5 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:35,545 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-11-23 12:18:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 12:18:35,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 5 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-11-23 12:18:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:35,547 INFO L225 Difference]: With dead ends: 67 [2021-11-23 12:18:35,547 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 12:18:35,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:18:35,549 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 330 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:35,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 194 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:18:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 12:18:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2021-11-23 12:18:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 12:18:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-23 12:18:35,555 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 22 [2021-11-23 12:18:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:35,556 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-23 12:18:35,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 5 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-23 12:18:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 12:18:35,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:35,558 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:35,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:35,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 12:18:35,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1832751745, now seen corresponding path program 1 times [2021-11-23 12:18:35,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:35,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547114670] [2021-11-23 12:18:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:35,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:35,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-23 12:18:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:36,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547114670] [2021-11-23 12:18:36,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547114670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:36,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531738618] [2021-11-23 12:18:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:36,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:36,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:36,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:18:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:36,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 12:18:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:36,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 26 [2021-11-23 12:18:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531738618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:37,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:37,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2021-11-23 12:18:37,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642113849] [2021-11-23 12:18:37,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:37,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 12:18:37,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 12:18:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 12:18:37,371 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 36 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:39,186 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2021-11-23 12:18:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 12:18:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2021-11-23 12:18:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:39,189 INFO L225 Difference]: With dead ends: 171 [2021-11-23 12:18:39,189 INFO L226 Difference]: Without dead ends: 171 [2021-11-23 12:18:39,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=437, Invalid=3595, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 12:18:39,192 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 244 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:39,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 1071 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 794 Invalid, 0 Unknown, 260 Unchecked, 0.6s Time] [2021-11-23 12:18:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-23 12:18:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 98. [2021-11-23 12:18:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 87 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-23 12:18:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-11-23 12:18:39,204 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 24 [2021-11-23 12:18:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:39,204 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-11-23 12:18:39,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-11-23 12:18:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:18:39,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:39,207 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-23 12:18:39,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:39,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 12:18:39,424 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:39,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1882974596, now seen corresponding path program 1 times [2021-11-23 12:18:39,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:39,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343601290] [2021-11-23 12:18:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:39,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:39,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-23 12:18:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:18:39,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:39,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343601290] [2021-11-23 12:18:39,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343601290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:39,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119359643] [2021-11-23 12:18:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:39,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:39,628 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:39,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:18:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:39,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 12:18:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:39,721 INFO L388 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 7 treesize of output 6 [2021-11-23 12:18:41,758 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_check_~a#1.base_BEFORE_CALL_7| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_check_~a#1.base_BEFORE_CALL_7|))) is different from true [2021-11-23 12:18:41,900 INFO L388 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 29 treesize of output 23 [2021-11-23 12:18:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 12:18:42,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:44,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119359643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:44,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:18:44,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-23 12:18:44,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456592469] [2021-11-23 12:18:44,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:44,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 12:18:44,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 12:18:44,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=294, Unknown=1, NotChecked=34, Total=380 [2021-11-23 12:18:44,215 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 12:18:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:44,513 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2021-11-23 12:18:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 12:18:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-23 12:18:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:44,517 INFO L225 Difference]: With dead ends: 96 [2021-11-23 12:18:44,517 INFO L226 Difference]: Without dead ends: 88 [2021-11-23 12:18:44,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=123, Invalid=530, Unknown=1, NotChecked=48, Total=702 [2021-11-23 12:18:44,518 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:44,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 129 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-11-23 12:18:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-23 12:18:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-23 12:18:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 78 states have internal predecessors, (83), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-23 12:18:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2021-11-23 12:18:44,528 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 27 [2021-11-23 12:18:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:44,529 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2021-11-23 12:18:44,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 12:18:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2021-11-23 12:18:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 12:18:44,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:44,532 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:44,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:44,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 12:18:44,758 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:44,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1554343825, now seen corresponding path program 1 times [2021-11-23 12:18:44,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:44,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099673068] [2021-11-23 12:18:44,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:44,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-23 12:18:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:18:44,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099673068] [2021-11-23 12:18:44,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099673068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:44,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084039825] [2021-11-23 12:18:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:44,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:44,928 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:44,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:18:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:45,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 12:18:45,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:18:45,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 29 treesize of output 25 [2021-11-23 12:18:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:18:46,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084039825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:18:46,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:18:46,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 13] total 34 [2021-11-23 12:18:46,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035925546] [2021-11-23 12:18:46,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:46,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 12:18:46,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 12:18:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 12:18:46,646 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 34 states, 31 states have (on average 3.129032258064516) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:49,264 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-11-23 12:18:49,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 12:18:49,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.129032258064516) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-11-23 12:18:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:49,266 INFO L225 Difference]: With dead ends: 54 [2021-11-23 12:18:49,266 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 12:18:49,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=279, Invalid=2071, Unknown=2, NotChecked=0, Total=2352 [2021-11-23 12:18:49,269 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 82 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:49,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 522 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 423 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2021-11-23 12:18:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 12:18:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-11-23 12:18:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 12:18:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-23 12:18:49,274 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2021-11-23 12:18:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:49,275 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-23 12:18:49,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.129032258064516) internal successors, (97), 26 states have internal predecessors, (97), 9 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 12:18:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-23 12:18:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 12:18:49,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:18:49,281 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:49,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:49,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 12:18:49,510 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 11 more)] === [2021-11-23 12:18:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:18:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2043278376, now seen corresponding path program 1 times [2021-11-23 12:18:49,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:18:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305660572] [2021-11-23 12:18:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:49,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:18:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:49,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-23 12:18:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:49,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-23 12:18:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:18:49,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:18:49,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305660572] [2021-11-23 12:18:49,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305660572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:49,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293414457] [2021-11-23 12:18:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:18:49,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:18:49,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:18:49,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:18:49,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:18:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:18:50,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 12:18:50,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:18:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:18:50,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:18:56,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293414457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:18:56,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 12:18:56,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-11-23 12:18:56,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987039089] [2021-11-23 12:18:56,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 12:18:56,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 12:18:56,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:18:56,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 12:18:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:18:56,550 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 30 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 25 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:18:57,894 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-23 12:18:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 12:18:57,895 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 25 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2021-11-23 12:18:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:18:57,896 INFO L225 Difference]: With dead ends: 52 [2021-11-23 12:18:57,896 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 12:18:57,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=376, Invalid=2594, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 12:18:57,898 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 121 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:18:57,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 353 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:18:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 12:18:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 12:18:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:18:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 12:18:57,900 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-11-23 12:18:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:18:57,900 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 12:18:57,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 25 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 12:18:57,901 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 12:18:57,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 12:18:57,903 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (13 of 14 remaining) [2021-11-23 12:18:57,904 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (12 of 14 remaining) [2021-11-23 12:18:57,905 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (11 of 14 remaining) [2021-11-23 12:18:57,905 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (10 of 14 remaining) [2021-11-23 12:18:57,905 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 14 remaining) [2021-11-23 12:18:57,905 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION (8 of 14 remaining) [2021-11-23 12:18:57,906 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION (7 of 14 remaining) [2021-11-23 12:18:57,906 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION (6 of 14 remaining) [2021-11-23 12:18:57,906 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION (5 of 14 remaining) [2021-11-23 12:18:57,906 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION (4 of 14 remaining) [2021-11-23 12:18:57,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION (3 of 14 remaining) [2021-11-23 12:18:57,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION (2 of 14 remaining) [2021-11-23 12:18:57,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr8REQUIRES_VIOLATION (1 of 14 remaining) [2021-11-23 12:18:57,907 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr9ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2021-11-23 12:18:57,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:18:58,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 12:18:58,125 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:18:58,127 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 12:18:58,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:18:58 BoogieIcfgContainer [2021-11-23 12:18:58,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 12:18:58,131 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:18:58,131 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:18:58,131 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:18:58,134 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:18:22" (3/4) ... [2021-11-23 12:18:58,138 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 12:18:58,146 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-11-23 12:18:58,156 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-23 12:18:58,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-23 12:18:58,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-23 12:18:58,157 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 12:18:58,227 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 12:18:58,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:18:58,228 INFO L158 Benchmark]: Toolchain (without parser) took 36656.22ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 67.7MB in the beginning and 97.7MB in the end (delta: -30.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:18:58,229 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 109.1MB. Free memory is still 84.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:18:58,230 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.62ms. Allocated memory is still 109.1MB. Free memory was 67.5MB in the beginning and 82.3MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:18:58,230 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.87ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 80.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:18:58,231 INFO L158 Benchmark]: Boogie Preprocessor took 59.23ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 79.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:18:58,231 INFO L158 Benchmark]: RCFGBuilder took 606.28ms. Allocated memory is still 109.1MB. Free memory was 79.3MB in the beginning and 67.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 12:18:58,232 INFO L158 Benchmark]: TraceAbstraction took 35373.52ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 66.4MB in the beginning and 100.7MB in the end (delta: -34.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:18:58,232 INFO L158 Benchmark]: Witness Printer took 96.49ms. Allocated memory is still 136.3MB. Free memory was 100.7MB in the beginning and 97.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 12:18:58,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 109.1MB. Free memory is still 84.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 433.62ms. Allocated memory is still 109.1MB. Free memory was 67.5MB in the beginning and 82.3MB in the end (delta: -14.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.87ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 80.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.23ms. Allocated memory is still 109.1MB. Free memory was 80.6MB in the beginning and 79.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 606.28ms. Allocated memory is still 109.1MB. Free memory was 79.3MB in the beginning and 67.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 35373.52ms. Allocated memory was 109.1MB in the beginning and 136.3MB in the end (delta: 27.3MB). Free memory was 66.4MB in the beginning and 100.7MB in the end (delta: -34.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 96.49ms. Allocated memory is still 136.3MB. Free memory was 100.7MB in the beginning and 97.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 41]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 48 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 35.3s, OverallIterations: 16, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2240 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2236 mSDsluCounter, 4063 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 405 IncrementalHoareTripleChecker+Unchecked, 3472 mSDsCounter, 387 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3386 IncrementalHoareTripleChecker+Invalid, 4178 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 387 mSolverCounterUnsat, 591 mSDtfsCounter, 3386 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 673 GetRequests, 312 SyntacticMatches, 12 SemanticMatches, 349 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 15.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=13, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 290 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 552 NumberOfCodeBlocks, 552 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 664 ConstructedInterpolants, 23 QuantifiedInterpolants, 6634 SizeOfPredicates, 96 NumberOfNonLiveVariables, 1514 ConjunctsInSsa, 212 ConjunctsInUnsatCore, 31 InterpolantComputations, 8 PerfectInterpolantSequences, 81/192 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 - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 12:18:58,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ccb132a-073f-46af-9562-5c1cf15146a3/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE