./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/20051113-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/20051113-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL --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 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:54:07,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:54:07,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:54:07,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:54:07,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:54:07,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:54:07,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:54:07,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:54:07,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:54:07,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:54:07,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:54:07,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:54:07,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:54:07,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:54:07,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:54:07,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:54:07,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:54:07,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:54:07,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:54:07,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:54:07,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:54:07,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:54:07,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:54:07,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:54:08,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:54:08,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:54:08,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:54:08,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:54:08,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:54:08,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:54:08,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:54:08,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:54:08,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:54:08,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:54:08,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:54:08,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:54:08,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:54:08,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:54:08,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:54:08,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:54:08,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:54:08,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:54:08,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:54:08,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:54:08,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:54:08,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:54:08,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:54:08,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:54:08,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:54:08,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:54:08,043 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:54:08,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:54:08,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:54:08,043 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:54:08,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:54:08,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:54:08,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:54:08,044 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:54:08,044 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:54:08,044 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:54:08,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:54:08,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:54:08,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:54:08,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:54:08,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:54:08,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:54:08,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:54:08,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:54:08,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:54:08,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:54:08,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:54:08,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:54:08,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:54:08,047 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_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 [2021-11-19 04:54:08,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:54:08,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:54:08,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:54:08,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:54:08,333 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:54:08,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/memsafety/20051113-1.i [2021-11-19 04:54:08,416 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/data/31c601a5f/a5280f09d8c14012ac4dd1dbce6e78c1/FLAGdc2c5726b [2021-11-19 04:54:08,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:54:08,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/sv-benchmarks/c/memsafety/20051113-1.i [2021-11-19 04:54:08,982 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/data/31c601a5f/a5280f09d8c14012ac4dd1dbce6e78c1/FLAGdc2c5726b [2021-11-19 04:54:09,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/data/31c601a5f/a5280f09d8c14012ac4dd1dbce6e78c1 [2021-11-19 04:54:09,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:54:09,267 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:54:09,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:54:09,269 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:54:09,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:54:09,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68875ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09, skipping insertion in model container [2021-11-19 04:54:09,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:54:09,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:54:09,675 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:54:09,685 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:54:09,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:54:09,762 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:54:09,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09 WrapperNode [2021-11-19 04:54:09,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:54:09,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:54:09,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:54:09,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:54:09,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:54:09,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:54:09,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:54:09,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:54:09,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (1/1) ... [2021-11-19 04:54:09,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:54:09,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:09,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:54:09,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:54:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:54:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:54:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:54:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:54:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:54:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-19 04:54:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-19 04:54:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-19 04:54:09,958 INFO L138 BoogieDeclarations]: Found implementation of procedure Sum [2021-11-19 04:54:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure Sum2 [2021-11-19 04:54:09,959 INFO L138 BoogieDeclarations]: Found implementation of procedure dummy_abort [2021-11-19 04:54:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:54:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 04:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:54:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:54:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-19 04:54:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-19 04:54:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-19 04:54:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:54:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:54:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:54:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:54:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:54:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:54:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:54:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:54:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:54:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:54:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:54:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:54:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:54:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:54:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:54:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:54:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:54:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:54:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:54:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:54:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:54:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:54:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:54:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:54:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:54:09,981 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:54:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:54:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:54:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:54:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:54:09,982 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:54:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:54:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:54:09,983 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:54:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:54:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:54:09,984 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:54:09,985 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:54:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:54:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:54:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:54:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:54:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:54:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:54:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:54:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:54:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:54:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:54:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:54:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:54:09,988 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:54:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-19 04:54:09,989 INFO L130 BoogieDeclarations]: Found specification of procedure Sum [2021-11-19 04:54:09,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:54:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure Sum2 [2021-11-19 04:54:09,994 INFO L130 BoogieDeclarations]: Found specification of procedure dummy_abort [2021-11-19 04:54:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:54:09,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:54:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 04:54:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:54:09,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:54:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:54:09,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:54:10,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:54:10,244 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:54:10,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:54:10,394 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 04:54:10,517 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:54:10,528 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:54:10,528 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 04:54:10,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:10 BoogieIcfgContainer [2021-11-19 04:54:10,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:54:10,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:54:10,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:54:10,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:54:10,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:54:09" (1/3) ... [2021-11-19 04:54:10,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5779dab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:10, skipping insertion in model container [2021-11-19 04:54:10,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:09" (2/3) ... [2021-11-19 04:54:10,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5779dab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:10, skipping insertion in model container [2021-11-19 04:54:10,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:10" (3/3) ... [2021-11-19 04:54:10,539 INFO L111 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2021-11-19 04:54:10,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:54:10,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-19 04:54:10,607 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:54:10,622 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 [2021-11-19 04:54:10,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-19 04:54:10,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 39 states have (on average 1.794871794871795) internal successors, (70), 65 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:54:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:54:10,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:10,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:10,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1871088023, now seen corresponding path program 1 times [2021-11-19 04:54:10,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:10,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995100036] [2021-11-19 04:54:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:10,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:10,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:10,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:10,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995100036] [2021-11-19 04:54:10,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995100036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:10,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:10,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:54:10,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26654089] [2021-11-19 04:54:10,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:10,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:10,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:54:11,037 INFO L87 Difference]: Start difference. First operand has 77 states, 39 states have (on average 1.794871794871795) internal successors, (70), 65 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:54:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:11,311 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-19 04:54:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:54:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-19 04:54:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:11,325 INFO L225 Difference]: With dead ends: 69 [2021-11-19 04:54:11,325 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 04:54:11,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:11,333 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 78 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:11,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 63 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 04:54:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-19 04:54:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 55 states have internal predecessors, (58), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-19 04:54:11,387 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 7 [2021-11-19 04:54:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:11,389 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-19 04:54:11,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:54:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-19 04:54:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 04:54:11,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:11,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:11,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:54:11,391 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1871088022, now seen corresponding path program 1 times [2021-11-19 04:54:11,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:11,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17373502] [2021-11-19 04:54:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:11,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:11,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:11,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:11,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17373502] [2021-11-19 04:54:11,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17373502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:11,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:11,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:54:11,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260250923] [2021-11-19 04:54:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:11,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:11,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:54:11,533 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:54:11,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:11,657 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-19 04:54:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:54:11,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-19 04:54:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:11,659 INFO L225 Difference]: With dead ends: 58 [2021-11-19 04:54:11,659 INFO L226 Difference]: Without dead ends: 58 [2021-11-19 04:54:11,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:54:11,661 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:11,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 57 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-19 04:54:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-19 04:54:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-19 04:54:11,671 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 7 [2021-11-19 04:54:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-19 04:54:11,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:54:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-19 04:54:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:54:11,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:11,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:11,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:54:11,673 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting SumErr0REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1083580870, now seen corresponding path program 1 times [2021-11-19 04:54:11,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:11,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317771323] [2021-11-19 04:54:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:11,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:11,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:11,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317771323] [2021-11-19 04:54:11,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317771323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:11,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:11,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:11,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445862311] [2021-11-19 04:54:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:11,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:54:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:54:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:54:11,865 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:54:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:12,143 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-11-19 04:54:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:54:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-19 04:54:12,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:12,149 INFO L225 Difference]: With dead ends: 61 [2021-11-19 04:54:12,149 INFO L226 Difference]: Without dead ends: 61 [2021-11-19 04:54:12,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:54:12,158 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:12,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 51 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-19 04:54:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-11-19 04:54:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 45 states have internal predecessors, (48), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-11-19 04:54:12,179 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 23 [2021-11-19 04:54:12,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:12,180 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-11-19 04:54:12,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:54:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-11-19 04:54:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:54:12,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:12,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:12,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:54:12,182 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting SumErr1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1083580869, now seen corresponding path program 1 times [2021-11-19 04:54:12,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:12,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288412408] [2021-11-19 04:54:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:12,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:12,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:12,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288412408] [2021-11-19 04:54:12,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288412408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:12,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:12,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:54:12,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916816376] [2021-11-19 04:54:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:12,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:12,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:12,415 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:54:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:12,699 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-19 04:54:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:54:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-19 04:54:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:12,703 INFO L225 Difference]: With dead ends: 60 [2021-11-19 04:54:12,704 INFO L226 Difference]: Without dead ends: 60 [2021-11-19 04:54:12,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:54:12,715 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:12,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 50 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-19 04:54:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-11-19 04:54:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 44 states have internal predecessors, (47), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-11-19 04:54:12,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2021-11-19 04:54:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:12,731 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-11-19 04:54:12,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:54:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-11-19 04:54:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:54:12,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:12,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:12,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:54:12,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1939130692, now seen corresponding path program 1 times [2021-11-19 04:54:12,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:12,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676329280] [2021-11-19 04:54:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:12,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:12,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:12,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676329280] [2021-11-19 04:54:12,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676329280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:12,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:12,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:54:12,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757403881] [2021-11-19 04:54:12,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:12,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:12,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:12,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:12,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:12,886 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:54:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:13,228 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-19 04:54:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:54:13,229 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-19 04:54:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:13,233 INFO L225 Difference]: With dead ends: 68 [2021-11-19 04:54:13,233 INFO L226 Difference]: Without dead ends: 68 [2021-11-19 04:54:13,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:54:13,234 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:13,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 47 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-19 04:54:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-19 04:54:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.275) internal successors, (51), 47 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-19 04:54:13,251 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2021-11-19 04:54:13,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:13,252 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-19 04:54:13,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:54:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-19 04:54:13,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:54:13,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:13,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:54:13,254 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting Sum2Err0REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1681534269, now seen corresponding path program 1 times [2021-11-19 04:54:13,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:13,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692532568] [2021-11-19 04:54:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:13,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:13,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:13,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692532568] [2021-11-19 04:54:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692532568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:13,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:54:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302539101] [2021-11-19 04:54:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:54:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:54:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:54:13,398 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:54:13,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:13,662 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-11-19 04:54:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:54:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-19 04:54:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:13,663 INFO L225 Difference]: With dead ends: 61 [2021-11-19 04:54:13,663 INFO L226 Difference]: Without dead ends: 61 [2021-11-19 04:54:13,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:54:13,664 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 124 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:13,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 55 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-19 04:54:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-11-19 04:54:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.225) internal successors, (49), 45 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-19 04:54:13,670 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 31 [2021-11-19 04:54:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:13,671 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-19 04:54:13,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:54:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-19 04:54:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:54:13,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:13,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:13,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:54:13,673 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting Sum2Err1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1681534268, now seen corresponding path program 1 times [2021-11-19 04:54:13,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:13,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166670455] [2021-11-19 04:54:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:13,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:13,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:13,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166670455] [2021-11-19 04:54:13,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166670455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:13,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:13,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:13,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953436806] [2021-11-19 04:54:13,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:13,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:13,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:13,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:13,766 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:54:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:13,992 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-11-19 04:54:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:54:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-19 04:54:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:13,993 INFO L225 Difference]: With dead ends: 66 [2021-11-19 04:54:13,994 INFO L226 Difference]: Without dead ends: 66 [2021-11-19 04:54:13,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:54:13,995 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 91 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:13,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 68 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-19 04:54:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-19 04:54:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 48 states have internal predecessors, (52), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 04:54:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-19 04:54:14,001 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 31 [2021-11-19 04:54:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:14,001 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-19 04:54:14,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 04:54:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-19 04:54:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 04:54:14,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:14,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:14,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 04:54:14,017 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:14,018 INFO L85 PathProgramCache]: Analyzing trace with hash -486062570, now seen corresponding path program 1 times [2021-11-19 04:54:14,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:14,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424223336] [2021-11-19 04:54:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:14,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:14,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:14,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424223336] [2021-11-19 04:54:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424223336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:14,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29983189] [2021-11-19 04:54:14,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:14,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:14,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:14,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:54:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:54:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:14,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:15,159 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 13 treesize of output 9 [2021-11-19 04:54:15,242 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 11 treesize of output 7 [2021-11-19 04:54:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:15,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29983189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:15,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:15,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2021-11-19 04:54:15,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239311612] [2021-11-19 04:54:15,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:15,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 04:54:15,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 04:54:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:54:15,274 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:54:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:15,985 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-19 04:54:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:54:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2021-11-19 04:54:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:15,986 INFO L225 Difference]: With dead ends: 81 [2021-11-19 04:54:15,987 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 04:54:15,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:54:15,988 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:15,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:54:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 04:54:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-11-19 04:54:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 04:54:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-19 04:54:15,994 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2021-11-19 04:54:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:15,994 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-19 04:54:15,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:54:15,995 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-19 04:54:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-19 04:54:15,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:15,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:16,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 04:54:16,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:16,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting Sum2Err1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:16,197 INFO L85 PathProgramCache]: Analyzing trace with hash -772582610, now seen corresponding path program 1 times [2021-11-19 04:54:16,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:16,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769205866] [2021-11-19 04:54:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:16,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:16,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:16,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769205866] [2021-11-19 04:54:16,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769205866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:16,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:16,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:54:16,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458279095] [2021-11-19 04:54:16,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:16,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:16,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:16,305 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:54:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:16,534 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-19 04:54:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:54:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-11-19 04:54:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:16,538 INFO L225 Difference]: With dead ends: 74 [2021-11-19 04:54:16,538 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 04:54:16,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:54:16,541 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 96 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:16,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 47 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 04:54:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-11-19 04:54:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 57 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 04:54:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-11-19 04:54:16,558 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 34 [2021-11-19 04:54:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:16,561 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-11-19 04:54:16,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:54:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-11-19 04:54:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 04:54:16,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:16,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:16,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 04:54:16,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting Sum2Err3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 577453519, now seen corresponding path program 1 times [2021-11-19 04:54:16,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:16,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489616684] [2021-11-19 04:54:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:16,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:16,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:16,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489616684] [2021-11-19 04:54:16,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489616684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:16,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:54:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738531436] [2021-11-19 04:54:16,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:16,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:16,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:16,693 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:54:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:16,918 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-11-19 04:54:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:54:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-11-19 04:54:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:16,920 INFO L225 Difference]: With dead ends: 82 [2021-11-19 04:54:16,920 INFO L226 Difference]: Without dead ends: 82 [2021-11-19 04:54:16,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:54:16,921 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:16,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 44 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:16,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-19 04:54:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-11-19 04:54:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 04:54:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-19 04:54:16,925 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 36 [2021-11-19 04:54:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:16,926 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-19 04:54:16,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:54:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-19 04:54:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:54:16,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:16,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:16,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 04:54:16,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting Sum2Err3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 548314426, now seen corresponding path program 1 times [2021-11-19 04:54:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:16,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370781908] [2021-11-19 04:54:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:16,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:17,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:17,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:17,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:17,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:17,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370781908] [2021-11-19 04:54:17,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370781908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:17,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043332466] [2021-11-19 04:54:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:17,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:17,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:17,049 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:17,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:54:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:17,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:54:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:17,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:17,944 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 13 treesize of output 9 [2021-11-19 04:54:18,020 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 11 treesize of output 7 [2021-11-19 04:54:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043332466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:18,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:18,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 22 [2021-11-19 04:54:18,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203130113] [2021-11-19 04:54:18,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:18,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:54:18,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:54:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:54:18,037 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 23 states, 20 states have (on average 4.2) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 04:54:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:18,596 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-11-19 04:54:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:54:18,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.2) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2021-11-19 04:54:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:18,598 INFO L225 Difference]: With dead ends: 99 [2021-11-19 04:54:18,598 INFO L226 Difference]: Without dead ends: 99 [2021-11-19 04:54:18,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:54:18,600 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 264 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:18,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 152 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 453 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-11-19 04:54:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-19 04:54:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2021-11-19 04:54:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 71 states have internal predecessors, (80), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 04:54:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-19 04:54:18,607 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 41 [2021-11-19 04:54:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:18,607 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-19 04:54:18,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.2) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 04:54:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-19 04:54:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 04:54:18,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:18,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:18,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:18,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:18,838 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 301201259, now seen corresponding path program 1 times [2021-11-19 04:54:18,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:18,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541087718] [2021-11-19 04:54:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:18,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-19 04:54:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 04:54:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 04:54:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:18,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:18,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541087718] [2021-11-19 04:54:18,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541087718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:18,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:54:18,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:54:18,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029331733] [2021-11-19 04:54:18,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:18,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:54:18,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:18,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:54:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:54:18,922 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 04:54:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:19,102 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-11-19 04:54:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:54:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-11-19 04:54:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:19,104 INFO L225 Difference]: With dead ends: 94 [2021-11-19 04:54:19,104 INFO L226 Difference]: Without dead ends: 94 [2021-11-19 04:54:19,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:54:19,105 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:19,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 66 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-19 04:54:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-11-19 04:54:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 75 states have internal predecessors, (84), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 04:54:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-19 04:54:19,114 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 42 [2021-11-19 04:54:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-19 04:54:19,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 04:54:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-19 04:54:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-19 04:54:19,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:19,116 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:19,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 04:54:19,117 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 44885462, now seen corresponding path program 2 times [2021-11-19 04:54:19,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:19,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970077724] [2021-11-19 04:54:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:19,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:19,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:19,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:19,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970077724] [2021-11-19 04:54:19,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970077724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:19,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022441862] [2021-11-19 04:54:19,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:54:19,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:19,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:19,354 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:19,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:54:19,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 04:54:19,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:54:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:54:19,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:54:19,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022441862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:54:19,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:54:19,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-11-19 04:54:19,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784121108] [2021-11-19 04:54:19,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:19,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:54:19,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:54:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:54:19,582 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:54:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:19,604 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-11-19 04:54:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:54:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-19 04:54:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:19,606 INFO L225 Difference]: With dead ends: 92 [2021-11-19 04:54:19,606 INFO L226 Difference]: Without dead ends: 90 [2021-11-19 04:54:19,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:54:19,607 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:19,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 162 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:54:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-19 04:54:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-19 04:54:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 04:54:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-11-19 04:54:19,613 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 40 [2021-11-19 04:54:19,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:19,613 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-11-19 04:54:19,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:54:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-11-19 04:54:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:54:19,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:19,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:19,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:19,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 04:54:19,842 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2011158320, now seen corresponding path program 1 times [2021-11-19 04:54:19,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:19,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134337042] [2021-11-19 04:54:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:19,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:19,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:20,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:20,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:20,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134337042] [2021-11-19 04:54:20,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134337042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:20,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913227133] [2021-11-19 04:54:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:20,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:20,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:20,022 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:20,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:54:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 04:54:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:20,190 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 11 treesize of output 7 [2021-11-19 04:54:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-19 04:54:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:20,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-19 04:54:20,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:20,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-19 04:54:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:20,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-19 04:54:20,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2021-11-19 04:54:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:20,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:20,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2021-11-19 04:54:21,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:21,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 57 treesize of output 25 [2021-11-19 04:54:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:21,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:21,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913227133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:21,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:21,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 9] total 30 [2021-11-19 04:54:21,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014231686] [2021-11-19 04:54:21,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:21,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 04:54:21,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 04:54:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:54:21,815 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 25 states have internal predecessors, (77), 5 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:54:22,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:22,883 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-19 04:54:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:54:22,884 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 25 states have internal predecessors, (77), 5 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-19 04:54:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:22,885 INFO L225 Difference]: With dead ends: 90 [2021-11-19 04:54:22,885 INFO L226 Difference]: Without dead ends: 90 [2021-11-19 04:54:22,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:54:22,887 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 123 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:22,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 75 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:54:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-19 04:54:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-11-19 04:54:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 71 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 04:54:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-19 04:54:22,892 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 41 [2021-11-19 04:54:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:22,892 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-19 04:54:22,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 25 states have internal predecessors, (77), 5 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:54:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-19 04:54:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 04:54:22,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:22,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:22,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:23,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:54:23,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash 518229589, now seen corresponding path program 1 times [2021-11-19 04:54:23,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:23,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166882990] [2021-11-19 04:54:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:23,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 04:54:23,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:23,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:23,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166882990] [2021-11-19 04:54:23,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166882990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:23,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599445944] [2021-11-19 04:54:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:23,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:23,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:23,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:23,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:54:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:23,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:54:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:23,513 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 13 treesize of output 9 [2021-11-19 04:54:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:23,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:24,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599445944] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:24,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:54:24,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 13] total 27 [2021-11-19 04:54:24,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114693009] [2021-11-19 04:54:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:54:24,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:54:24,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:54:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:54:24,314 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:54:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:24,463 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-19 04:54:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:54:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2021-11-19 04:54:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:24,464 INFO L225 Difference]: With dead ends: 82 [2021-11-19 04:54:24,465 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 04:54:24,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:54:24,466 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:24,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 198 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:54:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 04:54:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-19 04:54:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-11-19 04:54:24,470 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 48 [2021-11-19 04:54:24,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:24,471 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-11-19 04:54:24,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:54:24,471 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-11-19 04:54:24,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-19 04:54:24,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:24,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:24,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:24,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:54:24,672 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash -145899252, now seen corresponding path program 1 times [2021-11-19 04:54:24,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:24,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320743216] [2021-11-19 04:54:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:24,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:24,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:24,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:24,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 04:54:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:54:24,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:24,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320743216] [2021-11-19 04:54:24,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320743216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:24,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191013047] [2021-11-19 04:54:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:24,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:24,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:25,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:54:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:54:25,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:25,181 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 13 treesize of output 9 [2021-11-19 04:54:25,204 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 04:54:25,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-19 04:54:25,250 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-19 04:54:25,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-19 04:54:25,970 INFO L354 Elim1Store]: treesize reduction 172, result has 20.7 percent of original size [2021-11-19 04:54:25,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 66 [2021-11-19 04:54:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:54:25,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:54:26,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191013047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:26,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:26,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2021-11-19 04:54:26,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361031651] [2021-11-19 04:54:26,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:26,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:54:26,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:26,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:54:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:54:26,378 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 24 states have internal predecessors, (87), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 04:54:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:27,044 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-11-19 04:54:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:54:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 24 states have internal predecessors, (87), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-11-19 04:54:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:27,046 INFO L225 Difference]: With dead ends: 82 [2021-11-19 04:54:27,046 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 04:54:27,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 04:54:27,048 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:27,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 196 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 311 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2021-11-19 04:54:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 04:54:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-19 04:54:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.125) internal successors, (72), 67 states have internal predecessors, (72), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-11-19 04:54:27,054 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 50 [2021-11-19 04:54:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:27,054 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-11-19 04:54:27,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 24 states have internal predecessors, (87), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 04:54:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-11-19 04:54:27,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-19 04:54:27,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:27,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:27,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:27,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:54:27,270 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting Sum2Err3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash 292501968, now seen corresponding path program 1 times [2021-11-19 04:54:27,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:27,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120539963] [2021-11-19 04:54:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:27,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:27,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:27,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 04:54:27,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:27,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120539963] [2021-11-19 04:54:27,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120539963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:27,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128693921] [2021-11-19 04:54:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:27,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:27,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:27,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:27,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:54:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:27,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:54:27,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:27,684 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 13 treesize of output 9 [2021-11-19 04:54:28,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:28,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-11-19 04:54:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:28,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:54:28,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128693921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:28,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:28,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 13] total 36 [2021-11-19 04:54:28,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586847689] [2021-11-19 04:54:28,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:28,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 04:54:28,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 04:54:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:54:28,744 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 36 states, 35 states have (on average 3.142857142857143) internal successors, (110), 31 states have internal predecessors, (110), 7 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:54:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:29,523 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-11-19 04:54:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:54:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.142857142857143) internal successors, (110), 31 states have internal predecessors, (110), 7 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2021-11-19 04:54:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:29,524 INFO L225 Difference]: With dead ends: 86 [2021-11-19 04:54:29,525 INFO L226 Difference]: Without dead ends: 83 [2021-11-19 04:54:29,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:54:29,527 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:29,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 668 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2021-11-19 04:54:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-19 04:54:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-11-19 04:54:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-11-19 04:54:29,531 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 54 [2021-11-19 04:54:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:29,534 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-11-19 04:54:29,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.142857142857143) internal successors, (110), 31 states have internal predecessors, (110), 7 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:54:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-11-19 04:54:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 04:54:29,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:29,535 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:29,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:29,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:29,754 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 173266183, now seen corresponding path program 2 times [2021-11-19 04:54:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:29,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577640080] [2021-11-19 04:54:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:29,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 04:54:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:54:30,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:30,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577640080] [2021-11-19 04:54:30,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577640080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:30,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578631248] [2021-11-19 04:54:30,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:54:30,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:30,037 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:30,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:54:30,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:54:30,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:54:30,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:30,203 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 11 treesize of output 7 [2021-11-19 04:54:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-19 04:54:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:30,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-19 04:54:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:30,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-19 04:54:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:30,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-19 04:54:30,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:30,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2021-11-19 04:54:30,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:54:30,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:54:30,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2021-11-19 04:54:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:54:31,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:54:31,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578631248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:31,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:31,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 8] total 32 [2021-11-19 04:54:31,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928573907] [2021-11-19 04:54:31,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:31,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 04:54:31,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 04:54:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-11-19 04:54:31,858 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 32 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 29 states have internal predecessors, (112), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-19 04:54:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:32,775 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-11-19 04:54:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:54:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 29 states have internal predecessors, (112), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-11-19 04:54:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:32,777 INFO L225 Difference]: With dead ends: 83 [2021-11-19 04:54:32,777 INFO L226 Difference]: Without dead ends: 77 [2021-11-19 04:54:32,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=374, Invalid=2488, Unknown=0, NotChecked=0, Total=2862 [2021-11-19 04:54:32,779 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 92 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:32,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 100 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 429 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2021-11-19 04:54:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-19 04:54:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-19 04:54:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-11-19 04:54:32,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 60 [2021-11-19 04:54:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:32,787 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-11-19 04:54:32,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.6129032258064515) internal successors, (112), 29 states have internal predecessors, (112), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-19 04:54:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-11-19 04:54:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 04:54:32,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:32,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:32,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:33,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:54:33,002 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:33,002 INFO L85 PathProgramCache]: Analyzing trace with hash -812327060, now seen corresponding path program 3 times [2021-11-19 04:54:33,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:33,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635703518] [2021-11-19 04:54:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:33,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-19 04:54:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:54:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:33,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:33,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635703518] [2021-11-19 04:54:33,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635703518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:33,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575376876] [2021-11-19 04:54:33,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:54:33,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:33,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:33,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:33,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:54:33,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-19 04:54:33,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:33,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:54:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:33,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:33,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575376876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:33,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:33,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2021-11-19 04:54:33,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233810149] [2021-11-19 04:54:33,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:33,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:54:33,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:33,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:54:33,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:54:33,782 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 10 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:54:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:34,118 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-11-19 04:54:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:54:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 10 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2021-11-19 04:54:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:34,119 INFO L225 Difference]: With dead ends: 84 [2021-11-19 04:54:34,119 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 04:54:34,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:54:34,120 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 81 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:34,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 58 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:54:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 04:54:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-19 04:54:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 68 states have internal predecessors, (69), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-11-19 04:54:34,125 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 70 [2021-11-19 04:54:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:34,125 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-11-19 04:54:34,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 10 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:54:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-11-19 04:54:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 04:54:34,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:34,127 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:34,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:34,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:34,330 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1414456326, now seen corresponding path program 4 times [2021-11-19 04:54:34,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:34,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459290632] [2021-11-19 04:54:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:34,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:54:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 04:54:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:34,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:34,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459290632] [2021-11-19 04:54:34,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459290632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:34,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666044448] [2021-11-19 04:54:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:54:34,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:34,566 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:34,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:54:35,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:54:35,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:35,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:54:35,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:35,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:35,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666044448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:35,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:35,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2021-11-19 04:54:35,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477551313] [2021-11-19 04:54:35,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:35,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:54:35,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:54:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:54:35,887 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:54:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:36,750 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-11-19 04:54:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:54:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2021-11-19 04:54:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:36,751 INFO L225 Difference]: With dead ends: 90 [2021-11-19 04:54:36,751 INFO L226 Difference]: Without dead ends: 86 [2021-11-19 04:54:36,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:54:36,752 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:36,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 86 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:54:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-19 04:54:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-19 04:54:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 74 states have internal predecessors, (75), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-11-19 04:54:36,757 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 73 [2021-11-19 04:54:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:36,757 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-11-19 04:54:36,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:54:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-11-19 04:54:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 04:54:36,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:36,759 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:36,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:36,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:36,978 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:36,978 INFO L85 PathProgramCache]: Analyzing trace with hash -602731962, now seen corresponding path program 5 times [2021-11-19 04:54:36,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:36,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227652229] [2021-11-19 04:54:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:36,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:54:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-19 04:54:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:37,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:37,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227652229] [2021-11-19 04:54:37,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227652229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:37,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804887556] [2021-11-19 04:54:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:54:37,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:37,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:37,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:54:37,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-19 04:54:37,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 04:54:37,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:38,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804887556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:39,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:54:39,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2021-11-19 04:54:39,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963294288] [2021-11-19 04:54:39,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:39,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-19 04:54:39,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:54:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-19 04:54:39,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:54:39,019 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:54:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:46,278 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-11-19 04:54:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-19 04:54:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2021-11-19 04:54:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:46,279 INFO L225 Difference]: With dead ends: 102 [2021-11-19 04:54:46,279 INFO L226 Difference]: Without dead ends: 98 [2021-11-19 04:54:46,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=882, Invalid=3150, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 04:54:46,281 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 166 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:46,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 128 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 04:54:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-19 04:54:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-19 04:54:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 86 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:54:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-11-19 04:54:46,287 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 79 [2021-11-19 04:54:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:46,287 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-11-19 04:54:46,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:54:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-11-19 04:54:46,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 04:54:46,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:46,289 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:46,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:46,495 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:54:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -55687482, now seen corresponding path program 6 times [2021-11-19 04:54:46,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:54:46,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650548233] [2021-11-19 04:54:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:54:46,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:54:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:46,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:54:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:54:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:47,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 04:54:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:47,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 04:54:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:54:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:54:47,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:54:47,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650548233] [2021-11-19 04:54:47,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650548233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:54:47,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334196303] [2021-11-19 04:54:47,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:54:47,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:54:47,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:54:47,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:54:47,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:55:33,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-19 04:55:33,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:55:33,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:55:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:55:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:55:34,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:55:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:55:37,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334196303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:55:37,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:55:37,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 75 [2021-11-19 04:55:37,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051400341] [2021-11-19 04:55:37,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:55:37,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-19 04:55:37,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:55:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-19 04:55:37,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=4255, Unknown=0, NotChecked=0, Total=5550 [2021-11-19 04:55:37,866 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.72) internal successors, (129), 73 states have internal predecessors, (129), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:55:45,483 WARN L227 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 127 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:55:54,464 WARN L227 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 122 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:56:08,949 WARN L227 SmtUtils]: Spent 9.68s on a formula simplification. DAG size of input: 117 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:58:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:58:08,412 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2021-11-19 04:58:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-19 04:58:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.72) internal successors, (129), 73 states have internal predecessors, (129), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-11-19 04:58:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:58:08,414 INFO L225 Difference]: With dead ends: 126 [2021-11-19 04:58:08,415 INFO L226 Difference]: Without dead ends: 122 [2021-11-19 04:58:08,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 153.1s TimeCoverageRelationStatistics Valid=3193, Invalid=12054, Unknown=5, NotChecked=0, Total=15252 [2021-11-19 04:58:08,421 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 404 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:58:08,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 212 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 2092 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 04:58:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-19 04:58:08,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-19 04:58:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 110 states have internal predecessors, (111), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:58:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2021-11-19 04:58:08,426 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 91 [2021-11-19 04:58:08,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:58:08,427 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2021-11-19 04:58:08,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.72) internal successors, (129), 73 states have internal predecessors, (129), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:58:08,427 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2021-11-19 04:58:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 04:58:08,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:58:08,429 INFO L514 BasicCegarLoop]: trace histogram [46, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:58:08,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:58:08,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 04:58:08,644 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-19 04:58:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:58:08,644 INFO L85 PathProgramCache]: Analyzing trace with hash 765493190, now seen corresponding path program 7 times [2021-11-19 04:58:08,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:58:08,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880259855] [2021-11-19 04:58:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:58:08,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:58:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:08,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:58:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:08,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:58:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:11,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 04:58:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:11,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 04:58:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:58:11,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:58:11,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880259855] [2021-11-19 04:58:11,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880259855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:58:11,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55951071] [2021-11-19 04:58:11,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:58:11,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:58:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:58:11,127 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:58:11,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e13362b-4037-4f86-a172-33cf282c40ce/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:58:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:58:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-19 04:58:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:58:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:58:15,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:58:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 04:58:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55951071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:58:34,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:58:34,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 147 [2021-11-19 04:58:34,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586422232] [2021-11-19 04:58:34,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:58:34,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-19 04:58:34,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:58:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-19 04:58:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4899, Invalid=16563, Unknown=0, NotChecked=0, Total=21462 [2021-11-19 04:58:34,252 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 147 states, 147 states have (on average 1.3673469387755102) internal successors, (201), 145 states have internal predecessors, (201), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 05:01:18,064 WARN L227 SmtUtils]: Spent 2.57m on a formula simplification. DAG size of input: 291 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:04:23,023 WARN L227 SmtUtils]: Spent 2.92m on a formula simplification. DAG size of input: 285 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:07:35,506 WARN L227 SmtUtils]: Spent 3.01m on a formula simplification. DAG size of input: 279 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)