./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8 --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 60396cce4fa0936fb91e88a54a287214045469c9d9b3d447954681e0a5aabbc0 --- 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-2329fc7 [2022-12-13 14:11:47,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:11:47,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:11:47,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:11:47,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:11:47,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:11:47,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:11:47,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:11:47,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:11:47,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:11:47,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:11:47,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:11:47,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:11:47,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:11:47,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:11:47,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:11:47,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:11:47,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:11:47,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:11:47,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:11:47,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:11:47,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:11:47,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:11:47,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:11:47,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:11:47,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:11:47,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:11:47,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:11:47,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:11:47,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:11:47,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:11:47,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:11:47,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:11:47,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:11:47,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:11:47,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:11:47,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:11:47,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:11:47,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:11:47,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:11:47,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:11:47,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:11:47,865 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:11:47,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:11:47,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:11:47,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:11:47,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:11:47,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:11:47,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:11:47,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:11:47,867 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:11:47,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:11:47,867 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:11:47,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:11:47,868 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:11:47,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:11:47,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:11:47,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:11:47,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:11:47,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:11:47,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:11:47,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:11:47,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:11:47,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:11:47,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:11:47,870 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:11:47,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:11:47,870 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:11:47,870 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60396cce4fa0936fb91e88a54a287214045469c9d9b3d447954681e0a5aabbc0 [2022-12-13 14:11:48,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:11:48,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:11:48,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:11:48,047 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:11:48,048 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:11:48,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2022-12-13 14:11:50,691 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:11:50,828 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:11:50,828 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2022-12-13 14:11:50,836 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/data/02e699ad5/53050a7bca2d487c88df54427faaafd8/FLAG0860dae68 [2022-12-13 14:11:50,846 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/data/02e699ad5/53050a7bca2d487c88df54427faaafd8 [2022-12-13 14:11:50,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:11:50,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:11:50,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:11:50,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:11:50,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:11:50,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:11:50" (1/1) ... [2022-12-13 14:11:50,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37328d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:50, skipping insertion in model container [2022-12-13 14:11:50,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:11:50" (1/1) ... [2022-12-13 14:11:50,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:11:50,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:11:51,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:11:51,057 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:11:51,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:11:51,099 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:11:51,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51 WrapperNode [2022-12-13 14:11:51,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:11:51,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:11:51,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:11:51,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:11:51,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,126 INFO L138 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-12-13 14:11:51,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:11:51,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:11:51,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:11:51,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:11:51,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,142 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:11:51,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:11:51,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:11:51,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:11:51,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (1/1) ... [2022-12-13 14:11:51,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:11:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:51,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:11:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:11:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:11:51,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:11:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:11:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2022-12-13 14:11:51,202 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2022-12-13 14:11:51,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:11:51,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:11:51,283 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:11:51,285 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:11:51,374 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:11:51,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:11:51,380 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 14:11:51,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:11:51 BoogieIcfgContainer [2022-12-13 14:11:51,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:11:51,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:11:51,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:11:51,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:11:51,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:11:50" (1/3) ... [2022-12-13 14:11:51,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b15522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:11:51, skipping insertion in model container [2022-12-13 14:11:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:51" (2/3) ... [2022-12-13 14:11:51,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b15522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:11:51, skipping insertion in model container [2022-12-13 14:11:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:11:51" (3/3) ... [2022-12-13 14:11:51,388 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca-1.i [2022-12-13 14:11:51,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:11:51,403 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-12-13 14:11:51,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:11:51,441 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=PETRI_NET, 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;@5d79b94b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:11:51,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 14:11:51,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:11:51,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:51,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:11:51,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-12-13 14:11:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:51,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753798619] [2022-12-13 14:11:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:51,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753798619] [2022-12-13 14:11:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753798619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:51,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:51,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:11:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822807943] [2022-12-13 14:11:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:51,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:11:51,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:11:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:11:51,676 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.5) 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) [2022-12-13 14:11:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:51,733 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-12-13 14:11:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:11:51,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2022-12-13 14:11:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:51,740 INFO L225 Difference]: With dead ends: 39 [2022-12-13 14:11:51,741 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 14:11:51,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:11:51,746 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:51,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 14:11:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-12-13 14:11:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.5) internal successors, (27), 24 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-12-13 14:11:51,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2022-12-13 14:11:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:51,776 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-12-13 14:11:51,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2022-12-13 14:11:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-12-13 14:11:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:11:51,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:51,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:11:51,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:11:51,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:51,785 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-12-13 14:11:51,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:51,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729285551] [2022-12-13 14:11:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:51,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:51,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:51,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729285551] [2022-12-13 14:11:51,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729285551] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:51,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:51,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:11:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048947156] [2022-12-13 14:11:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:51,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:11:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:11:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:11:51,854 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-12-13 14:11:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:51,875 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-13 14:11:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:11:51,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 [2022-12-13 14:11:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:51,876 INFO L225 Difference]: With dead ends: 26 [2022-12-13 14:11:51,876 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 14:11:51,877 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 [2022-12-13 14:11:51,878 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:51,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 14:11:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-13 14:11:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-12-13 14:11:51,882 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 6 [2022-12-13 14:11:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:51,883 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-12-13 14:11:51,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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) [2022-12-13 14:11:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-12-13 14:11:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:11:51,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:51,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:11:51,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:11:51,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-12-13 14:11:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320819672] [2022-12-13 14:11:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:51,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:52,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:52,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320819672] [2022-12-13 14:11:52,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320819672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:52,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:52,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:11:52,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919376608] [2022-12-13 14:11:52,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:52,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:11:52,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:11:52,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:11:52,038 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2022-12-13 14:11:52,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:52,072 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-12-13 14:11:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:11:52,073 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 [2022-12-13 14:11:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:52,074 INFO L225 Difference]: With dead ends: 31 [2022-12-13 14:11:52,074 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 14:11:52,074 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 [2022-12-13 14:11:52,075 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:52,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 14:11:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-12-13 14:11:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-12-13 14:11:52,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2022-12-13 14:11:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:52,080 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-12-13 14:11:52,080 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) [2022-12-13 14:11:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-12-13 14:11:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:11:52,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:52,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:11:52,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:11:52,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-12-13 14:11:52,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:52,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206899625] [2022-12-13 14:11:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:52,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:52,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:52,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206899625] [2022-12-13 14:11:52,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206899625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:52,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:52,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:11:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037651247] [2022-12-13 14:11:52,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:52,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:11:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:11:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:11:52,208 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2022-12-13 14:11:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:52,264 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-12-13 14:11:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:11:52,265 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 [2022-12-13 14:11:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:52,266 INFO L225 Difference]: With dead ends: 37 [2022-12-13 14:11:52,266 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 14:11:52,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:11:52,267 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:52,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 14:11:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-12-13 14:11:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-13 14:11:52,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2022-12-13 14:11:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:52,272 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-13 14:11:52,273 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) [2022-12-13 14:11:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-13 14:11:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:11:52,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:52,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:11:52,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:11:52,274 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2022-12-13 14:11:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:52,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765740138] [2022-12-13 14:11:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:52,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765740138] [2022-12-13 14:11:52,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765740138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:52,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:52,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:11:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256144345] [2022-12-13 14:11:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:52,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:11:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:11:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:11:52,375 INFO L87 Difference]: Start difference. First operand 29 states and 33 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) [2022-12-13 14:11:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:52,397 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-12-13 14:11:52,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:11:52,398 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 [2022-12-13 14:11:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:52,399 INFO L225 Difference]: With dead ends: 28 [2022-12-13 14:11:52,399 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 14:11:52,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:11:52,400 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:52,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 14:11:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-12-13 14:11:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-12-13 14:11:52,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2022-12-13 14:11:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:52,403 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-12-13 14:11:52,403 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) [2022-12-13 14:11:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-12-13 14:11:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 14:11:52,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:52,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:52,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:11:52,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting strlen_recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash -590943170, now seen corresponding path program 1 times [2022-12-13 14:11:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:52,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358599557] [2022-12-13 14:11:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:52,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:52,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358599557] [2022-12-13 14:11:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358599557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:52,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:52,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:11:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288955159] [2022-12-13 14:11:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:11:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:52,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:11:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:11:52,454 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:52,491 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-13 14:11:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:11:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 14:11:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:52,492 INFO L225 Difference]: With dead ends: 26 [2022-12-13 14:11:52,492 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 14:11:52,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:11:52,494 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:52,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 14:11:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-13 14:11:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:11:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-13 14:11:52,497 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9 [2022-12-13 14:11:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:52,497 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-13 14:11:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-13 14:11:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 14:11:52,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:52,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:11:52,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:52,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -590943169, now seen corresponding path program 1 times [2022-12-13 14:11:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:52,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109206230] [2022-12-13 14:11:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:52,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109206230] [2022-12-13 14:11:52,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109206230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:52,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:52,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:11:52,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780025593] [2022-12-13 14:11:52,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:52,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:11:52,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:11:52,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:11:52,624 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:52,703 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-12-13 14:11:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:11:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 14:11:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:52,704 INFO L225 Difference]: With dead ends: 34 [2022-12-13 14:11:52,705 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 14:11:52,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:11:52,706 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:52,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:11:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 14:11:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-13 14:11:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:11:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-13 14:11:52,710 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 9 [2022-12-13 14:11:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:52,710 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-13 14:11:52,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-13 14:11:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 14:11:52,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:52,710 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:52,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:11:52,711 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-12-13 14:11:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502981782] [2022-12-13 14:11:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:52,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502981782] [2022-12-13 14:11:52,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502981782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:11:52,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832787179] [2022-12-13 14:11:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:52,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:52,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:52,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:11:52,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:11:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:11:52,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:52,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 14:11:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:53,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:11:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:53,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832787179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:11:53,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:11:53,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-12-13 14:11:53,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180549662] [2022-12-13 14:11:53,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:11:53,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:11:53,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:11:53,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:11:53,338 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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) [2022-12-13 14:11:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:53,536 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-12-13 14:11:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:11:53,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 10 [2022-12-13 14:11:53,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:53,538 INFO L225 Difference]: With dead ends: 45 [2022-12-13 14:11:53,538 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 14:11:53,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:11:53,539 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:53,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 120 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:11:53,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 14:11:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2022-12-13 14:11:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:11:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-12-13 14:11:53,542 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2022-12-13 14:11:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:53,542 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-12-13 14:11:53,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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) [2022-12-13 14:11:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-12-13 14:11:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 14:11:53,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:53,543 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:53,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:53,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 14:11:53,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash 182504998, now seen corresponding path program 1 times [2022-12-13 14:11:53,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:53,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131315655] [2022-12-13 14:11:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:53,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:53,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131315655] [2022-12-13 14:11:53,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131315655] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:53,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:53,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:11:53,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669325271] [2022-12-13 14:11:53,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:53,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:11:53,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:53,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:11:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:11:53,858 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:53,914 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-12-13 14:11:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:11:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 14:11:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:53,915 INFO L225 Difference]: With dead ends: 40 [2022-12-13 14:11:53,915 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 14:11:53,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:11:53,916 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:53,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 105 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 14:11:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-12-13 14:11:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:11:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-13 14:11:53,919 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 13 [2022-12-13 14:11:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:53,919 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-13 14:11:53,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-13 14:11:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 14:11:53,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:53,920 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:53,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:11:53,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:53,920 INFO L85 PathProgramCache]: Analyzing trace with hash 883569576, now seen corresponding path program 1 times [2022-12-13 14:11:53,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:53,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198837426] [2022-12-13 14:11:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:53,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:54,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:54,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198837426] [2022-12-13 14:11:54,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198837426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:54,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:54,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 14:11:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184628087] [2022-12-13 14:11:54,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:11:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:11:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:11:54,041 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:54,123 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-12-13 14:11:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:11:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 14:11:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:54,125 INFO L225 Difference]: With dead ends: 51 [2022-12-13 14:11:54,125 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 14:11:54,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:11:54,126 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:54,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 14:11:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-12-13 14:11:54,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:11:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-12-13 14:11:54,130 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 13 [2022-12-13 14:11:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:54,131 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-12-13 14:11:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-12-13 14:11:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 14:11:54,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:54,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:11:54,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1361686065, now seen corresponding path program 1 times [2022-12-13 14:11:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:54,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108753182] [2022-12-13 14:11:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:54,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:11:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108753182] [2022-12-13 14:11:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108753182] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:54,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:11:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018286703] [2022-12-13 14:11:54,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:54,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:11:54,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:11:54,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:11:54,195 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:11:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:54,209 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-12-13 14:11:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:11:54,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-13 14:11:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:54,210 INFO L225 Difference]: With dead ends: 37 [2022-12-13 14:11:54,210 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 14:11:54,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:11:54,211 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:54,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:11:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 14:11:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-12-13 14:11:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-13 14:11:54,213 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-12-13 14:11:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:54,213 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-13 14:11:54,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:11:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-13 14:11:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 14:11:54,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:54,214 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:54,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:11:54,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:54,215 INFO L85 PathProgramCache]: Analyzing trace with hash 312590597, now seen corresponding path program 1 times [2022-12-13 14:11:54,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:54,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631402763] [2022-12-13 14:11:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:54,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:54,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631402763] [2022-12-13 14:11:54,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631402763] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:11:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791673785] [2022-12-13 14:11:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:54,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:11:54,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:11:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 14:11:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:54,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:11:54,663 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2022-12-13 14:11:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:54,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791673785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:11:54,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:11:54,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:11:54,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858864814] [2022-12-13 14:11:54,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:11:54,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:11:54,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:11:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:11:54,688 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 22 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:54,816 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-12-13 14:11:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:11:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 14:11:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:54,817 INFO L225 Difference]: With dead ends: 27 [2022-12-13 14:11:54,817 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 14:11:54,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:11:54,818 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:54,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 72 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:11:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 14:11:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-12-13 14:11:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-13 14:11:54,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-12-13 14:11:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:54,820 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-13 14:11:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-13 14:11:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 14:11:54,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:54,821 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:54,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:11:55,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 14:11:55,022 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2048380908, now seen corresponding path program 2 times [2022-12-13 14:11:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:55,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342635179] [2022-12-13 14:11:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:55,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:55,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:55,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342635179] [2022-12-13 14:11:55,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342635179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:11:55,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965513585] [2022-12-13 14:11:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:11:55,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:55,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:55,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:11:55,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:11:55,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:11:55,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:11:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 14:11:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:55,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 14:11:55,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:11:55,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 14:11:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:55,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:11:56,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 14:11:56,161 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-12-13 14:11:56,169 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 20 [2022-12-13 14:11:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:56,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965513585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:11:56,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:11:56,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-12-13 14:11:56,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967571719] [2022-12-13 14:11:56,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:11:56,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 14:11:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 14:11:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 14:11:56,193 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 34 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 26 states have internal predecessors, (42), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:57,082 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-12-13 14:11:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:11:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 26 states have internal predecessors, (42), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 14:11:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:57,083 INFO L225 Difference]: With dead ends: 44 [2022-12-13 14:11:57,083 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 14:11:57,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 14:11:57,084 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:57,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 137 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:11:57,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 14:11:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-12-13 14:11:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-12-13 14:11:57,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 21 [2022-12-13 14:11:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:57,086 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-12-13 14:11:57,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 26 states have internal predecessors, (42), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-12-13 14:11:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 14:11:57,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:57,086 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:57,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:11:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:11:57,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2083749168, now seen corresponding path program 3 times [2022-12-13 14:11:57,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:57,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093985368] [2022-12-13 14:11:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:57,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:57,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093985368] [2022-12-13 14:11:57,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093985368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:11:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306944645] [2022-12-13 14:11:57,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:11:57,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:57,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:57,539 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:11:57,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:11:57,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:11:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:11:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 14:11:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:57,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 14:11:57,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 14:11:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:57,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:11:57,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 14:11:57,918 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 12 [2022-12-13 14:11:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:57,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306944645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:11:57,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:11:57,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2022-12-13 14:11:57,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371018552] [2022-12-13 14:11:57,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:11:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:11:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:11:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:11:57,997 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 25 states have (on average 1.92) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:58,196 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-12-13 14:11:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 14:11:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.92) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 14:11:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:11:58,197 INFO L225 Difference]: With dead ends: 50 [2022-12-13 14:11:58,197 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 14:11:58,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 14:11:58,198 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:11:58,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 115 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:11:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 14:11:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-12-13 14:11:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-13 14:11:58,201 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-12-13 14:11:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:11:58,201 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-13 14:11:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.92) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:11:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-13 14:11:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 14:11:58,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:11:58,201 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:58,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:11:58,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:58,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 14:11:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1764143245, now seen corresponding path program 4 times [2022-12-13 14:11:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:58,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368299733] [2022-12-13 14:11:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:58,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:58,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368299733] [2022-12-13 14:11:58,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368299733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:11:58,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867140683] [2022-12-13 14:11:58,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:11:58,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:58,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:11:58,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:11:58,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:11:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:11:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 14:11:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:58,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 14:11:59,381 INFO L321 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2022-12-13 14:11:59,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2022-12-13 14:11:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:11:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:00,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-12-13 14:12:00,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2022-12-13 14:12:00,051 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 27 [2022-12-13 14:12:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:12:00,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867140683] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:00,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:00,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 42 [2022-12-13 14:12:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216625620] [2022-12-13 14:12:00,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:00,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 14:12:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 14:12:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 14:12:00,079 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:12:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:12:01,246 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-12-13 14:12:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:12:01,246 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 14:12:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:12:01,246 INFO L225 Difference]: With dead ends: 35 [2022-12-13 14:12:01,247 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 14:12:01,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=557, Invalid=3475, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 14:12:01,248 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:12:01,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 132 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:12:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 14:12:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 14:12:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:12:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 14:12:01,249 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2022-12-13 14:12:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:12:01,249 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 14:12:01,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:12:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 14:12:01,249 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location strlen_recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2022-12-13 14:12:01,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location strlen_recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 7 remaining) [2022-12-13 14:12:01,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:12:01,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:01,461 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:01,466 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 14:12:01,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 02:12:01 BoogieIcfgContainer [2022-12-13 14:12:01,473 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 14:12:01,475 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 14:12:01,475 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 14:12:01,476 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 14:12:01,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:11:51" (3/4) ... [2022-12-13 14:12:01,485 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 14:12:01,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec [2022-12-13 14:12:01,498 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-12-13 14:12:01,498 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-13 14:12:01,498 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 14:12:01,498 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 14:12:01,520 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 14:12:01,521 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 14:12:01,521 INFO L158 Benchmark]: Toolchain (without parser) took 10671.94ms. Allocated memory was 140.5MB in the beginning and 180.4MB in the end (delta: 39.8MB). Free memory was 106.6MB in the beginning and 58.5MB in the end (delta: 48.1MB). Peak memory consumption was 90.9MB. Max. memory is 16.1GB. [2022-12-13 14:12:01,521 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 140.5MB. Free memory is still 93.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:12:01,521 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.37ms. Allocated memory is still 140.5MB. Free memory was 106.1MB in the beginning and 90.6MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-13 14:12:01,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.75ms. Allocated memory is still 140.5MB. Free memory was 90.6MB in the beginning and 88.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:12:01,522 INFO L158 Benchmark]: Boogie Preprocessor took 16.60ms. Allocated memory is still 140.5MB. Free memory was 88.9MB in the beginning and 87.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:12:01,522 INFO L158 Benchmark]: RCFGBuilder took 237.38ms. Allocated memory is still 140.5MB. Free memory was 87.6MB in the beginning and 76.0MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 14:12:01,522 INFO L158 Benchmark]: TraceAbstraction took 10090.53ms. Allocated memory was 140.5MB in the beginning and 180.4MB in the end (delta: 39.8MB). Free memory was 75.2MB in the beginning and 61.5MB in the end (delta: 13.8MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. [2022-12-13 14:12:01,522 INFO L158 Benchmark]: Witness Printer took 45.77ms. Allocated memory is still 180.4MB. Free memory was 60.4MB in the beginning and 58.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:12:01,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 140.5MB. Free memory is still 93.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.37ms. Allocated memory is still 140.5MB. Free memory was 106.1MB in the beginning and 90.6MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.75ms. Allocated memory is still 140.5MB. Free memory was 90.6MB in the beginning and 88.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.60ms. Allocated memory is still 140.5MB. Free memory was 88.9MB in the beginning and 87.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 237.38ms. Allocated memory is still 140.5MB. Free memory was 87.6MB in the beginning and 76.0MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10090.53ms. Allocated memory was 140.5MB in the beginning and 180.4MB in the end (delta: 39.8MB). Free memory was 75.2MB in the beginning and 61.5MB in the end (delta: 13.8MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB. * Witness Printer took 45.77ms. Allocated memory is still 180.4MB. Free memory was 60.4MB in the beginning and 58.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 10.0s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 355 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 346 mSDsluCounter, 1146 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 876 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1924 IncrementalHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 270 mSDtfsCounter, 1924 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 383 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=10, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 67 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 308 NumberOfCodeBlocks, 303 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 393 ConstructedInterpolants, 27 QuantifiedInterpolants, 3779 SizeOfPredicates, 56 NumberOfNonLiveVariables, 474 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 25 InterpolantComputations, 10 PerfectInterpolantSequences, 73/217 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 14:12:01,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6713332b-b6cd-4fb8-b62f-ad0a4d15bcfb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE