./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/960521-1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/960521-1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ --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 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:42:35,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:42:35,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:42:35,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:42:35,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:42:35,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:42:35,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:42:35,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:42:35,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:42:35,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:42:35,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:42:35,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:42:35,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:42:35,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:42:35,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:42:35,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:42:35,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:42:35,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:42:35,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:42:35,944 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:42:35,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:42:35,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:42:35,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:42:35,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:42:35,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:42:35,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:42:35,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:42:35,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:42:35,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:42:35,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:42:35,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:42:35,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:42:35,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:42:35,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:42:35,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:42:35,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:42:35,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:42:35,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:42:35,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:42:35,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:42:35,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:42:35,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 10:42:36,064 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:42:36,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:42:36,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:42:36,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:42:36,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:42:36,068 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:42:36,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:42:36,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:42:36,069 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:42:36,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:42:36,071 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:42:36,071 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:42:36,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:42:36,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:42:36,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:42:36,072 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:42:36,073 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:42:36,073 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 10:42:36,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:42:36,073 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:42:36,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:42:36,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:42:36,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:42:36,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:42:36,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:42:36,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:42:36,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:42:36,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:42:36,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:42:36,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:42:36,077 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_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 [2022-10-17 10:42:36,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:42:36,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:42:36,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:42:36,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:42:36,398 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:42:36,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/memsafety/960521-1-2.i [2022-10-17 10:42:36,470 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/data/27e9166a8/8ab2ec1f10ce45cb981e8655680ca2fb/FLAGe9ccf7eed [2022-10-17 10:42:37,038 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:42:37,039 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/sv-benchmarks/c/memsafety/960521-1-2.i [2022-10-17 10:42:37,055 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/data/27e9166a8/8ab2ec1f10ce45cb981e8655680ca2fb/FLAGe9ccf7eed [2022-10-17 10:42:37,317 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/data/27e9166a8/8ab2ec1f10ce45cb981e8655680ca2fb [2022-10-17 10:42:37,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:42:37,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:42:37,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:42:37,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:42:37,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:42:37,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:37,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9323b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37, skipping insertion in model container [2022-10-17 10:42:37,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:37,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:42:37,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:42:37,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:42:37,894 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:42:37,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:42:37,997 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:42:37,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37 WrapperNode [2022-10-17 10:42:37,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:42:37,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:42:37,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:42:37,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:42:38,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,069 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-10-17 10:42:38,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:42:38,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:42:38,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:42:38,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:42:38,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,125 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:42:38,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:42:38,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:42:38,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:42:38,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (1/1) ... [2022-10-17 10:42:38,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:42:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:38,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:42:38,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:42:38,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:42:38,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:42:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:42:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:42:38,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:42:38,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:42:38,348 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:42:38,350 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:42:38,691 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:42:38,699 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:42:38,699 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:42:38,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:42:38 BoogieIcfgContainer [2022-10-17 10:42:38,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:42:38,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:42:38,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:42:38,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:42:38,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:42:37" (1/3) ... [2022-10-17 10:42:38,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9f4b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:42:38, skipping insertion in model container [2022-10-17 10:42:38,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:42:37" (2/3) ... [2022-10-17 10:42:38,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9f4b31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:42:38, skipping insertion in model container [2022-10-17 10:42:38,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:42:38" (3/3) ... [2022-10-17 10:42:38,714 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1-2.i [2022-10-17 10:42:38,754 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:42:38,754 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-10-17 10:42:38,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:42:38,871 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d40d450, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:42:38,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-10-17 10:42:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 10:42:38,885 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:38,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 10:42:38,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-10-17 10:42:38,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:38,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774050086] [2022-10-17 10:42:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:39,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:39,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774050086] [2022-10-17 10:42:39,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774050086] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:39,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:39,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:42:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948407829] [2022-10-17 10:42:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:39,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:39,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:39,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:39,352 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:39,415 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-10-17 10:42:39,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-17 10:42:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:39,429 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:42:39,429 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 10:42:39,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:39,436 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:39,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 10:42:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-17 10:42:39,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-10-17 10:42:39,488 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2022-10-17 10:42:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:39,489 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-10-17 10:42:39,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-10-17 10:42:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 10:42:39,490 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:39,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 10:42:39,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:42:39,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:39,492 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-10-17 10:42:39,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:39,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059542323] [2022-10-17 10:42:39,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:39,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:39,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:39,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059542323] [2022-10-17 10:42:39,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059542323] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:39,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:39,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:42:39,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139676864] [2022-10-17 10:42:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:39,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:39,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:39,753 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:39,798 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-10-17 10:42:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-10-17 10:42:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:39,802 INFO L225 Difference]: With dead ends: 47 [2022-10-17 10:42:39,802 INFO L226 Difference]: Without dead ends: 47 [2022-10-17 10:42:39,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:39,804 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:39,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:39,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-17 10:42:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-17 10:42:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-10-17 10:42:39,821 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2022-10-17 10:42:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:39,822 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-10-17 10:42:39,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-10-17 10:42:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:42:39,824 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:39,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:42:39,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:42:39,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2022-10-17 10:42:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:39,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003711972] [2022-10-17 10:42:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:40,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:40,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003711972] [2022-10-17 10:42:40,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003711972] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:40,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:40,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351703747] [2022-10-17 10:42:40,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:40,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:42:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:42:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:42:40,069 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:40,165 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-10-17 10:42:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:42:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:40,167 INFO L225 Difference]: With dead ends: 44 [2022-10-17 10:42:40,167 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:42:40,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:42:40,169 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:40,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:42:40,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-17 10:42:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-10-17 10:42:40,177 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2022-10-17 10:42:40,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:40,178 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-10-17 10:42:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:40,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-10-17 10:42:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:42:40,181 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:40,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:42:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:42:40,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:40,186 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2022-10-17 10:42:40,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:40,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302461267] [2022-10-17 10:42:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:40,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302461267] [2022-10-17 10:42:40,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302461267] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:40,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:40,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:42:40,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957739728] [2022-10-17 10:42:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:40,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:42:40,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:40,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:42:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:42:40,535 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:40,709 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-10-17 10:42:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:42:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:42:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:40,713 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:42:40,713 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 10:42:40,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:42:40,718 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:40,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 10:42:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-10-17 10:42:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-10-17 10:42:40,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 6 [2022-10-17 10:42:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:40,726 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-10-17 10:42:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-10-17 10:42:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:42:40,730 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:40,730 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:40,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:42:40,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2022-10-17 10:42:40,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:40,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784447578] [2022-10-17 10:42:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:40,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784447578] [2022-10-17 10:42:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784447578] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421537936] [2022-10-17 10:42:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:41,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:41,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:41,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:42:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:42:41,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:42:41,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-17 10:42:41,256 INFO L390 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 10 treesize of output 8 [2022-10-17 10:42:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:41,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:42:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:41,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421537936] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:42:41,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:42:41,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-10-17 10:42:41,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447236773] [2022-10-17 10:42:41,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:42:41,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:42:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:41,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:42:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:42:41,570 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:41,850 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-10-17 10:42:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:42:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:42:41,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:41,864 INFO L225 Difference]: With dead ends: 95 [2022-10-17 10:42:41,864 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 10:42:41,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:42:41,868 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:41,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 101 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:42:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 10:42:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2022-10-17 10:42:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-10-17 10:42:41,893 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 9 [2022-10-17 10:42:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:41,893 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-10-17 10:42:41,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-10-17 10:42:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:42:41,895 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:41,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:41,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:42,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:42,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:42,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2022-10-17 10:42:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:42,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982677680] [2022-10-17 10:42:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:42:42,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:42,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982677680] [2022-10-17 10:42:42,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982677680] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:42,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:42,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:42:42,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477348220] [2022-10-17 10:42:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:42:42,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:42:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:42:42,180 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:42,226 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-10-17 10:42:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:42:42,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:42:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:42,228 INFO L225 Difference]: With dead ends: 55 [2022-10-17 10:42:42,228 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:42:42,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:42:42,230 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:42,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:42:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-10-17 10:42:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:42,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-10-17 10:42:42,249 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2022-10-17 10:42:42,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:42,249 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-10-17 10:42:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-10-17 10:42:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:42:42,250 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:42,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:42,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:42:42,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:42,252 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2022-10-17 10:42:42,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614003980] [2022-10-17 10:42:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:42,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:42,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:42,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614003980] [2022-10-17 10:42:42,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614003980] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:42,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663734757] [2022-10-17 10:42:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:42,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:42,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:42,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:42:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:42,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:42:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:42,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:42:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:42,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663734757] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:42:42,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:42:42,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-10-17 10:42:42,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822986552] [2022-10-17 10:42:42,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:42:42,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:42:42,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:42:42,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:42:42,479 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:42,590 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2022-10-17 10:42:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:42:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:42:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:42,592 INFO L225 Difference]: With dead ends: 87 [2022-10-17 10:42:42,593 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 10:42:42,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:42:42,594 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:42,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 10:42:42,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2022-10-17 10:42:42,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-10-17 10:42:42,611 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 11 [2022-10-17 10:42:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:42,612 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-10-17 10:42:42,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-10-17 10:42:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:42:42,613 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:42,613 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2022-10-17 10:42:42,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:42,827 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2022-10-17 10:42:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152560936] [2022-10-17 10:42:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:43,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:43,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152560936] [2022-10-17 10:42:43,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152560936] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:43,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736691224] [2022-10-17 10:42:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:42:43,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:43,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:43,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:43,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:42:43,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:42:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:42:43,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:42:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:42:43,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-17 10:42:43,374 INFO L390 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 10 treesize of output 8 [2022-10-17 10:42:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:43,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:42:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:44,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736691224] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:42:44,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:42:44,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-10-17 10:42:44,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509546343] [2022-10-17 10:42:44,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:42:44,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:42:44,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:42:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:42:44,242 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:44,834 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-10-17 10:42:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:42:44,840 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-17 10:42:44,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:44,841 INFO L225 Difference]: With dead ends: 184 [2022-10-17 10:42:44,841 INFO L226 Difference]: Without dead ends: 184 [2022-10-17 10:42:44,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:42:44,843 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1077 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:44,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:42:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-10-17 10:42:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 59. [2022-10-17 10:42:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-10-17 10:42:44,861 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 18 [2022-10-17 10:42:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:44,861 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-10-17 10:42:44,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-10-17 10:42:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:42:44,863 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:44,863 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:44,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:45,078 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:45,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1502042668, now seen corresponding path program 2 times [2022-10-17 10:42:45,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:45,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442834694] [2022-10-17 10:42:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:45,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:42:45,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442834694] [2022-10-17 10:42:45,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442834694] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:45,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960167045] [2022-10-17 10:42:45,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:42:45,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:45,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:45,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:45,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:42:45,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-17 10:42:45,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:42:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:42:45,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:45,377 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:42:45,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:42:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-10-17 10:42:45,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:42:45,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960167045] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:45,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:42:45,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-10-17 10:42:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244361070] [2022-10-17 10:42:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:42:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:42:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:42:45,506 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:45,552 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-10-17 10:42:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:42:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-17 10:42:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:45,554 INFO L225 Difference]: With dead ends: 53 [2022-10-17 10:42:45,554 INFO L226 Difference]: Without dead ends: 53 [2022-10-17 10:42:45,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:42:45,558 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:45,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-17 10:42:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-10-17 10:42:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.173913043478261) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-10-17 10:42:45,564 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 26 [2022-10-17 10:42:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:45,564 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-10-17 10:42:45,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:45,565 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-10-17 10:42:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:42:45,566 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:45,567 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:45,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:45,779 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 1 times [2022-10-17 10:42:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:45,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709198874] [2022-10-17 10:42:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:46,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:46,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709198874] [2022-10-17 10:42:46,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709198874] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:46,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005223859] [2022-10-17 10:42:46,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:46,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:46,015 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:46,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:42:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:42:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:46,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:42:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:46,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005223859] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:42:46,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:42:46,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-10-17 10:42:46,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218925420] [2022-10-17 10:42:46,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:42:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:42:46,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:42:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:42:46,433 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:46,794 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2022-10-17 10:42:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:42:46,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-10-17 10:42:46,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:46,796 INFO L225 Difference]: With dead ends: 247 [2022-10-17 10:42:46,796 INFO L226 Difference]: Without dead ends: 247 [2022-10-17 10:42:46,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2022-10-17 10:42:46,798 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 583 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:46,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 250 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:42:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-10-17 10:42:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 92. [2022-10-17 10:42:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1529411764705881) internal successors, (98), 91 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2022-10-17 10:42:46,804 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 29 [2022-10-17 10:42:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:46,804 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2022-10-17 10:42:46,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2022-10-17 10:42:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 10:42:46,806 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:46,807 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:46,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:47,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:42:47,027 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -248790283, now seen corresponding path program 2 times [2022-10-17 10:42:47,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:47,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420658815] [2022-10-17 10:42:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:47,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420658815] [2022-10-17 10:42:47,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420658815] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:47,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41060827] [2022-10-17 10:42:47,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:42:47,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:47,527 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:47,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:42:47,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:42:47,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:42:47,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:42:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:48,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:42:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:48,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41060827] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:42:48,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:42:48,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-10-17 10:42:48,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029154949] [2022-10-17 10:42:48,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:42:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-10-17 10:42:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-10-17 10:42:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-10-17 10:42:48,718 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:49,798 INFO L93 Difference]: Finished difference Result 527 states and 528 transitions. [2022-10-17 10:42:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-17 10:42:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-10-17 10:42:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:49,808 INFO L225 Difference]: With dead ends: 527 [2022-10-17 10:42:49,808 INFO L226 Difference]: Without dead ends: 527 [2022-10-17 10:42:49,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-10-17 10:42:49,812 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1929 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:49,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1929 Valid, 392 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:42:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-10-17 10:42:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 164. [2022-10-17 10:42:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 157 states have (on average 1.1337579617834395) internal successors, (178), 163 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2022-10-17 10:42:49,830 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 53 [2022-10-17 10:42:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:49,831 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2022-10-17 10:42:49,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2022-10-17 10:42:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-17 10:42:49,844 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:49,844 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:49,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:50,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:42:50,051 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2038312715, now seen corresponding path program 3 times [2022-10-17 10:42:50,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:50,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264616618] [2022-10-17 10:42:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:42:51,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:51,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264616618] [2022-10-17 10:42:51,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264616618] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:51,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974874435] [2022-10-17 10:42:51,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:42:51,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:51,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:51,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:42:51,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 10:42:51,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:42:51,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-10-17 10:42:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:51,759 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:42:51,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-17 10:42:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-17 10:42:52,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:42:52,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974874435] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:52,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:42:52,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [34] total 38 [2022-10-17 10:42:52,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932074696] [2022-10-17 10:42:52,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:52,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:42:52,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:52,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:42:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-10-17 10:42:52,384 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:52,450 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2022-10-17 10:42:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:42:52,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-10-17 10:42:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:52,468 INFO L225 Difference]: With dead ends: 163 [2022-10-17 10:42:52,468 INFO L226 Difference]: Without dead ends: 163 [2022-10-17 10:42:52,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-10-17 10:42:52,470 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:52,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 30 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:42:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-10-17 10:42:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-10-17 10:42:52,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 162 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-10-17 10:42:52,477 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 101 [2022-10-17 10:42:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:52,477 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-10-17 10:42:52,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-10-17 10:42:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-10-17 10:42:52,492 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:52,492 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:52,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:42:52,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:42:52,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash -376576047, now seen corresponding path program 1 times [2022-10-17 10:42:52,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:52,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291731563] [2022-10-17 10:42:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-10-17 10:42:52,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:52,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291731563] [2022-10-17 10:42:52,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291731563] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:42:52,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:42:52,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:42:52,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014592117] [2022-10-17 10:42:52,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:42:52,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:42:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:52,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:42:52,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:52,898 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:52,910 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2022-10-17 10:42:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:42:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-10-17 10:42:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:52,914 INFO L225 Difference]: With dead ends: 161 [2022-10-17 10:42:52,914 INFO L226 Difference]: Without dead ends: 161 [2022-10-17 10:42:52,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:42:52,916 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:52,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:42:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-10-17 10:42:52,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-10-17 10:42:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2022-10-17 10:42:52,925 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 147 [2022-10-17 10:42:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:52,927 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2022-10-17 10:42:52,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2022-10-17 10:42:52,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-10-17 10:42:52,932 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:52,932 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:52,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:42:52,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:42:52,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:42:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1125685499, now seen corresponding path program 1 times [2022-10-17 10:42:52,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:42:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401764573] [2022-10-17 10:42:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:52,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:42:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-10-17 10:42:53,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:42:53,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401764573] [2022-10-17 10:42:53,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401764573] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:42:53,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694107227] [2022-10-17 10:42:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:42:53,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:42:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:42:53,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:42:53,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:42:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:42:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-17 10:42:54,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:42:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-10-17 10:42:55,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:42:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-10-17 10:42:56,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694107227] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:42:56,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:42:56,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 34, 34] total 82 [2022-10-17 10:42:56,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629009346] [2022-10-17 10:42:56,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:42:56,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-10-17 10:42:56,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:42:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-10-17 10:42:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2370, Invalid=4272, Unknown=0, NotChecked=0, Total=6642 [2022-10-17 10:42:56,848 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 82 states, 82 states have (on average 3.1097560975609757) internal successors, (255), 82 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:42:59,893 INFO L93 Difference]: Finished difference Result 965 states and 966 transitions. [2022-10-17 10:42:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-10-17 10:42:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.1097560975609757) internal successors, (255), 82 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-10-17 10:42:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:42:59,900 INFO L225 Difference]: With dead ends: 965 [2022-10-17 10:42:59,900 INFO L226 Difference]: Without dead ends: 965 [2022-10-17 10:42:59,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4529, Invalid=8353, Unknown=0, NotChecked=0, Total=12882 [2022-10-17 10:42:59,907 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3886 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3886 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:42:59,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3886 Valid, 669 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:42:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-10-17 10:42:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 305. [2022-10-17 10:42:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.0166112956810631) internal successors, (306), 304 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2022-10-17 10:42:59,918 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 149 [2022-10-17 10:42:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:42:59,919 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2022-10-17 10:42:59,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.1097560975609757) internal successors, (255), 82 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:42:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2022-10-17 10:42:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-10-17 10:42:59,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:42:59,924 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:42:59,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:43:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:43:00,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-10-17 10:43:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:43:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1756594171, now seen corresponding path program 2 times [2022-10-17 10:43:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:43:00,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338246553] [2022-10-17 10:43:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:43:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:43:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:43:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-10-17 10:43:02,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:43:02,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338246553] [2022-10-17 10:43:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338246553] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:43:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972282183] [2022-10-17 10:43:02,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:43:02,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:43:02,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:43:02,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:43:02,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84050791-e69e-48f0-aed5-f9210c423e41/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:43:02,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:43:02,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:43:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 65 conjunts are in the unsatisfiable core [2022-10-17 10:43:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates...