./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-recursive-malloc/rec_strcopy_malloc.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-recursive-malloc/rec_strcopy_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8 --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 64bit --witnessprinter.graph.data.programhash 4f531da4514da78f664dbd663145b26ee24930c7e93acdc31160c6cc4e4d5de8 --- 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-e04fb08 [2022-11-16 12:48:09,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:48:09,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:48:09,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:48:09,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:48:09,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:48:09,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:48:09,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:48:09,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:48:09,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:48:09,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:48:09,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:48:09,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:48:09,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:48:09,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:48:09,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:48:09,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:48:09,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:48:09,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:48:09,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:48:09,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:48:09,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:48:09,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:48:09,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:48:09,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:48:09,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:48:09,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:48:09,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:48:09,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:48:09,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:48:09,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:48:09,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:48:09,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:48:09,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:48:09,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:48:09,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:48:09,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:48:09,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:48:09,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:48:09,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:48:09,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:48:09,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-16 12:48:09,997 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:48:09,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:48:10,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:48:10,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:48:10,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:48:10,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:48:10,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:48:10,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:48:10,012 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:48:10,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:48:10,013 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:48:10,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:48:10,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:48:10,014 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:48:10,014 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:48:10,014 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:48:10,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:48:10,015 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:48:10,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:48:10,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:48:10,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:48:10,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:48:10,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:48:10,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:48:10,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:48:10,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:48:10,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:48:10,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f531da4514da78f664dbd663145b26ee24930c7e93acdc31160c6cc4e4d5de8 [2022-11-16 12:48:10,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:48:10,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:48:10,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:48:10,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:48:10,402 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:48:10,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/termination-recursive-malloc/rec_strcopy_malloc.i [2022-11-16 12:48:10,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/data/b386b1efb/adf8ffc11df448c1bde0d1669ee5c659/FLAGd3ce990dd [2022-11-16 12:48:11,244 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:48:11,245 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/sv-benchmarks/c/termination-recursive-malloc/rec_strcopy_malloc.i [2022-11-16 12:48:11,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/data/b386b1efb/adf8ffc11df448c1bde0d1669ee5c659/FLAGd3ce990dd [2022-11-16 12:48:11,564 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/data/b386b1efb/adf8ffc11df448c1bde0d1669ee5c659 [2022-11-16 12:48:11,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:48:11,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:48:11,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:48:11,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:48:11,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:48:11,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b165fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11, skipping insertion in model container [2022-11-16 12:48:11,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:48:11,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:48:11,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:48:11,868 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:48:11,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:48:11,907 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:48:11,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11 WrapperNode [2022-11-16 12:48:11,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:48:11,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:48:11,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:48:11,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:48:11,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,953 INFO L138 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 39 [2022-11-16 12:48:11,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:48:11,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:48:11,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:48:11,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:48:11,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:11,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:12,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:12,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:12,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:12,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:48:12,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:48:12,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:48:12,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:48:12,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (1/1) ... [2022-11-16 12:48:12,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:48:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:12,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:48:12,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:48:12,108 INFO L130 BoogieDeclarations]: Found specification of procedure rec_strcopy_helper [2022-11-16 12:48:12,109 INFO L138 BoogieDeclarations]: Found implementation of procedure rec_strcopy_helper [2022-11-16 12:48:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:48:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:48:12,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:48:12,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:48:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:48:12,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:48:12,269 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:48:12,273 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:48:12,596 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:48:12,603 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:48:12,603 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 12:48:12,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:48:12 BoogieIcfgContainer [2022-11-16 12:48:12,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:48:12,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:48:12,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:48:12,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:48:12,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:48:11" (1/3) ... [2022-11-16 12:48:12,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79af225b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:48:12, skipping insertion in model container [2022-11-16 12:48:12,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:48:11" (2/3) ... [2022-11-16 12:48:12,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79af225b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:48:12, skipping insertion in model container [2022-11-16 12:48:12,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:48:12" (3/3) ... [2022-11-16 12:48:12,633 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_strcopy_malloc.i [2022-11-16 12:48:12,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:48:12,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-16 12:48:12,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:48:12,771 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7787019b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:48:12,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-16 12:48:12,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 40 states have internal predecessors, (41), 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) [2022-11-16 12:48:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:48:12,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:12,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:48:12,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 46825623, now seen corresponding path program 1 times [2022-11-16 12:48:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:12,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376951637] [2022-11-16 12:48:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:12,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:13,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376951637] [2022-11-16 12:48:13,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376951637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:13,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:13,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:13,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571412058] [2022-11-16 12:48:13,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:13,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:13,237 INFO L87 Difference]: Start difference. First operand has 43 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 40 states have internal predecessors, (41), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-16 12:48:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:13,344 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-11-16 12:48:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-16 12:48:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:13,359 INFO L225 Difference]: With dead ends: 42 [2022-11-16 12:48:13,359 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 12:48:13,363 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 [2022-11-16 12:48:13,368 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:13,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 55 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 12:48:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-16 12:48:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 37 states have internal predecessors, (38), 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) [2022-11-16 12:48:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-11-16 12:48:13,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 5 [2022-11-16 12:48:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:13,433 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-11-16 12:48:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-16 12:48:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-11-16 12:48:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:48:13,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:13,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:48:13,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:48:13,436 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash 46825624, now seen corresponding path program 1 times [2022-11-16 12:48:13,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:13,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433489412] [2022-11-16 12:48:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:13,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:13,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:13,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433489412] [2022-11-16 12:48:13,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433489412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:13,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:13,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:48:13,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331509519] [2022-11-16 12:48:13,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:48:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:48:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:48:13,858 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-16 12:48:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:14,004 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2022-11-16 12:48:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:48:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-16 12:48:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:14,010 INFO L225 Difference]: With dead ends: 61 [2022-11-16 12:48:14,010 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 12:48:14,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:14,019 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:14,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 108 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 12:48:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2022-11-16 12:48:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.6) internal successors, (40), 39 states have internal predecessors, (40), 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) [2022-11-16 12:48:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-16 12:48:14,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 5 [2022-11-16 12:48:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:14,036 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-16 12:48:14,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-16 12:48:14,037 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-16 12:48:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:48:14,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:14,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:48:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:48:14,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash 46827546, now seen corresponding path program 1 times [2022-11-16 12:48:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:14,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229175879] [2022-11-16 12:48:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:14,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229175879] [2022-11-16 12:48:14,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229175879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:14,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:14,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:48:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667816499] [2022-11-16 12:48:14,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:14,226 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 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) [2022-11-16 12:48:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:14,297 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-11-16 12:48:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 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 5 [2022-11-16 12:48:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:14,302 INFO L225 Difference]: With dead ends: 41 [2022-11-16 12:48:14,302 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 12:48:14,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:48:14,309 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:14,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:48:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 12:48:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-11-16 12:48:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.608695652173913) internal successors, (37), 36 states have internal predecessors, (37), 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) [2022-11-16 12:48:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-16 12:48:14,316 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 5 [2022-11-16 12:48:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:14,317 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-16 12:48:14,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 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) [2022-11-16 12:48:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-16 12:48:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:14,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:14,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:14,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:48:14,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:14,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:14,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1718638621, now seen corresponding path program 1 times [2022-11-16 12:48:14,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:14,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770163351] [2022-11-16 12:48:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770163351] [2022-11-16 12:48:14,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770163351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:14,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:14,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:48:14,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440461445] [2022-11-16 12:48:14,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:14,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:48:14,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:48:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:48:14,590 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:14,729 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-11-16 12:48:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:48:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:48:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:14,731 INFO L225 Difference]: With dead ends: 37 [2022-11-16 12:48:14,731 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 12:48:14,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:14,733 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:14,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 82 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 12:48:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-16 12:48:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 34 states have internal predecessors, (35), 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) [2022-11-16 12:48:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-16 12:48:14,740 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 10 [2022-11-16 12:48:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:14,741 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-16 12:48:14,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-16 12:48:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:48:14,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:14,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:14,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:48:14,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1718638620, now seen corresponding path program 1 times [2022-11-16 12:48:14,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155847666] [2022-11-16 12:48:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:15,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:15,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155847666] [2022-11-16 12:48:15,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155847666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:15,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:15,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:48:15,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986055259] [2022-11-16 12:48:15,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:48:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:48:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:48:15,117 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:15,439 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-11-16 12:48:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:48:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:48:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:15,441 INFO L225 Difference]: With dead ends: 48 [2022-11-16 12:48:15,441 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 12:48:15,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:48:15,442 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:15,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 129 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:48:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 12:48:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-16 12:48:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.5) internal successors, (45), 42 states have internal predecessors, (45), 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) [2022-11-16 12:48:15,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-16 12:48:15,450 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 10 [2022-11-16 12:48:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:15,450 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-16 12:48:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:15,450 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-16 12:48:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:15,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:15,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:15,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:48:15,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:15,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1738189725, now seen corresponding path program 1 times [2022-11-16 12:48:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:15,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781481225] [2022-11-16 12:48:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:15,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781481225] [2022-11-16 12:48:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781481225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:15,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:15,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:48:15,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444926389] [2022-11-16 12:48:15,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:15,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:48:15,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:15,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:48:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:48:15,570 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:15,655 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-16 12:48:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:48:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:15,657 INFO L225 Difference]: With dead ends: 45 [2022-11-16 12:48:15,658 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 12:48:15,658 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 [2022-11-16 12:48:15,659 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:15,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 12:48:15,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 12:48:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 41 states have internal predecessors, (43), 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) [2022-11-16 12:48:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-16 12:48:15,665 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 11 [2022-11-16 12:48:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:15,666 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-16 12:48:15,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-16 12:48:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:15,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:15,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:15,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:48:15,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1738189724, now seen corresponding path program 1 times [2022-11-16 12:48:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:15,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963477677] [2022-11-16 12:48:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:15,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:15,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963477677] [2022-11-16 12:48:15,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963477677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:15,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:15,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:48:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681297459] [2022-11-16 12:48:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:15,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:48:15,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:48:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:48:15,851 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:15,957 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-16 12:48:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:48:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:15,962 INFO L225 Difference]: With dead ends: 75 [2022-11-16 12:48:15,962 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 12:48:15,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:15,966 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 45 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:15,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 135 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 12:48:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2022-11-16 12:48:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 54 states have internal predecessors, (55), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-11-16 12:48:15,985 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2022-11-16 12:48:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:15,986 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-11-16 12:48:15,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-11-16 12:48:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:48:15,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:15,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:15,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:48:15,988 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1058131354, now seen corresponding path program 1 times [2022-11-16 12:48:15,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355374910] [2022-11-16 12:48:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:16,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355374910] [2022-11-16 12:48:16,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355374910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:16,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:16,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:48:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616332017] [2022-11-16 12:48:16,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:16,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:48:16,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:48:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:48:16,267 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:16,421 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-11-16 12:48:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:48:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:48:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:16,426 INFO L225 Difference]: With dead ends: 59 [2022-11-16 12:48:16,427 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 12:48:16,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:48:16,428 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:16,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 101 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 12:48:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-11-16 12:48:16,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.4) internal successors, (42), 41 states have internal predecessors, (42), 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) [2022-11-16 12:48:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-11-16 12:48:16,449 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2022-11-16 12:48:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:16,450 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-11-16 12:48:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-11-16 12:48:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:48:16,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:16,451 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:16,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:48:16,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash -794664304, now seen corresponding path program 1 times [2022-11-16 12:48:16,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313877320] [2022-11-16 12:48:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:16,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:16,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313877320] [2022-11-16 12:48:16,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313877320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:16,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:16,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:48:16,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812331482] [2022-11-16 12:48:16,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:48:16,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:48:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:48:16,990 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2022-11-16 12:48:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:17,331 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-11-16 12:48:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:48:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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 17 [2022-11-16 12:48:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:17,332 INFO L225 Difference]: With dead ends: 74 [2022-11-16 12:48:17,333 INFO L226 Difference]: Without dead ends: 74 [2022-11-16 12:48:17,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:48:17,334 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:17,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 231 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-16 12:48:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2022-11-16 12:48:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 53 states have internal predecessors, (53), 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) [2022-11-16 12:48:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-11-16 12:48:17,344 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 17 [2022-11-16 12:48:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:17,344 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-11-16 12:48:17,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 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) [2022-11-16 12:48:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-11-16 12:48:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:48:17,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:17,348 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:48:17,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:17,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2074527982, now seen corresponding path program 1 times [2022-11-16 12:48:17,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:17,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077020549] [2022-11-16 12:48:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:17,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:18,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077020549] [2022-11-16 12:48:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077020549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307630125] [2022-11-16 12:48:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:18,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:18,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:48:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:48:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:18,519 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 [2022-11-16 12:48:18,532 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 6 treesize of output 5 [2022-11-16 12:48:18,608 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 [2022-11-16 12:48:18,905 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:48:18,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-16 12:48:18,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2022-11-16 12:48:19,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 12:48:19,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:48:19,805 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 23 treesize of output 24 [2022-11-16 12:48:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:20,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:21,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:48:21,637 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-11-16 12:48:21,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:48:21,666 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 33 treesize of output 34 [2022-11-16 12:48:21,679 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 9 treesize of output 7 [2022-11-16 12:48:22,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:48:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:22,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307630125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:22,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:22,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2022-11-16 12:48:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243941172] [2022-11-16 12:48:22,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:22,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:48:22,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:48:22,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1204, Unknown=1, NotChecked=0, Total=1332 [2022-11-16 12:48:22,028 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:23,032 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-11-16 12:48:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:48:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:48:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:23,037 INFO L225 Difference]: With dead ends: 60 [2022-11-16 12:48:23,037 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 12:48:23,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=197, Invalid=1782, Unknown=1, NotChecked=0, Total=1980 [2022-11-16 12:48:23,039 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:23,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 444 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 158 Unchecked, 0.1s Time] [2022-11-16 12:48:23,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 12:48:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-16 12:48:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 54 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 12:48:23,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-11-16 12:48:23,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 17 [2022-11-16 12:48:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:23,045 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-11-16 12:48:23,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-11-16 12:48:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:48:23,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:23,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:23,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:23,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:48:23,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 114141942, now seen corresponding path program 1 times [2022-11-16 12:48:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477120927] [2022-11-16 12:48:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:24,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477120927] [2022-11-16 12:48:24,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477120927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:24,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54813342] [2022-11-16 12:48:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:24,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:24,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:24,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:48:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:48:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:24,249 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 [2022-11-16 12:48:24,342 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-16 12:48:24,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-11-16 12:48:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:25,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54813342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:25,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-16 12:48:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280667596] [2022-11-16 12:48:25,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:48:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:48:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:48:25,788 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 32 states, 28 states have (on average 1.5) internal successors, (42), 26 states have internal predecessors, (42), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:27,286 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-11-16 12:48:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 12:48:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.5) internal successors, (42), 26 states have internal predecessors, (42), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:48:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:27,296 INFO L225 Difference]: With dead ends: 72 [2022-11-16 12:48:27,296 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 12:48:27,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:48:27,298 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 159 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:27,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 291 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 260 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 12:48:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 12:48:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-11-16 12:48:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:27,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-11-16 12:48:27,304 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 18 [2022-11-16 12:48:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:27,304 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-11-16 12:48:27,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.5) internal successors, (42), 26 states have internal predecessors, (42), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-11-16 12:48:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:48:27,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:27,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:27,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:48:27,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:48:27,517 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash 885260528, now seen corresponding path program 1 times [2022-11-16 12:48:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832625728] [2022-11-16 12:48:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832625728] [2022-11-16 12:48:27,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832625728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:27,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:27,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:48:27,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588573971] [2022-11-16 12:48:27,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:27,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:48:27,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:48:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:48:27,593 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-11-16 12:48:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:27,643 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2022-11-16 12:48:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:48:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 19 [2022-11-16 12:48:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:27,645 INFO L225 Difference]: With dead ends: 69 [2022-11-16 12:48:27,645 INFO L226 Difference]: Without dead ends: 69 [2022-11-16 12:48:27,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:27,647 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:27,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 104 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:48:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-16 12:48:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-16 12:48:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-11-16 12:48:27,659 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 19 [2022-11-16 12:48:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:27,660 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-11-16 12:48:27,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2022-11-16 12:48:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-11-16 12:48:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:48:27,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:27,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:48:27,670 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting rec_strcopy_helperErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1978745129, now seen corresponding path program 1 times [2022-11-16 12:48:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:27,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725180785] [2022-11-16 12:48:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:27,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:48:27,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725180785] [2022-11-16 12:48:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725180785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:27,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:27,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:48:27,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983133828] [2022-11-16 12:48:27,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:27,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:48:27,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:48:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:48:27,737 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:27,763 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-11-16 12:48:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:48:27,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 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 20 [2022-11-16 12:48:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:27,765 INFO L225 Difference]: With dead ends: 68 [2022-11-16 12:48:27,765 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 12:48:27,765 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 [2022-11-16 12:48:27,768 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:27,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:48:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 12:48:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-16 12:48:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 61 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-16 12:48:27,783 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 20 [2022-11-16 12:48:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:27,784 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-16 12:48:27,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-16 12:48:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:48:27,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:27,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:27,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:48:27,786 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1673272664, now seen corresponding path program 1 times [2022-11-16 12:48:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:27,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010168425] [2022-11-16 12:48:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:27,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:27,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:27,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010168425] [2022-11-16 12:48:27,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010168425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:27,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:27,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:48:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140379634] [2022-11-16 12:48:27,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:27,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:48:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:48:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:48:27,937 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-11-16 12:48:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:28,018 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-11-16 12:48:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:48:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 20 [2022-11-16 12:48:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:28,020 INFO L225 Difference]: With dead ends: 67 [2022-11-16 12:48:28,020 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 12:48:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:28,021 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:28,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 12:48:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-16 12:48:28,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 60 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-11-16 12:48:28,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 20 [2022-11-16 12:48:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:28,027 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-11-16 12:48:28,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-11-16 12:48:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-11-16 12:48:28,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:48:28,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:28,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:28,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:48:28,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash 331845106, now seen corresponding path program 1 times [2022-11-16 12:48:28,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:28,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750453661] [2022-11-16 12:48:28,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:28,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:28,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:28,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750453661] [2022-11-16 12:48:28,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750453661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:28,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:28,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:48:28,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347986546] [2022-11-16 12:48:28,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:28,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:48:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:48:28,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:28,144 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-16 12:48:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:28,256 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-11-16 12:48:28,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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 21 [2022-11-16 12:48:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:28,258 INFO L225 Difference]: With dead ends: 66 [2022-11-16 12:48:28,258 INFO L226 Difference]: Without dead ends: 66 [2022-11-16 12:48:28,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:48:28,259 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 27 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:28,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 110 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-16 12:48:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-16 12:48:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.196078431372549) internal successors, (61), 59 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-11-16 12:48:28,265 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 21 [2022-11-16 12:48:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:28,265 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-11-16 12:48:28,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-11-16 12:48:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-11-16 12:48:28,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:48:28,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:28,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:48:28,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:28,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1697263770, now seen corresponding path program 1 times [2022-11-16 12:48:28,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:28,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112935852] [2022-11-16 12:48:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:28,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:28,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112935852] [2022-11-16 12:48:28,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112935852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:28,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:28,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:48:28,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172821884] [2022-11-16 12:48:28,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:28,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:48:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:48:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:48:28,340 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-16 12:48:28,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:28,387 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-11-16 12:48:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:48:28,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-11-16 12:48:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:28,388 INFO L225 Difference]: With dead ends: 65 [2022-11-16 12:48:28,389 INFO L226 Difference]: Without dead ends: 65 [2022-11-16 12:48:28,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:28,390 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:28,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:48:28,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-16 12:48:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-16 12:48:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 58 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-11-16 12:48:28,395 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 22 [2022-11-16 12:48:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:28,395 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-11-16 12:48:28,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-16 12:48:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-11-16 12:48:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:48:28,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:28,397 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:28,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:48:28,398 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1413481378, now seen corresponding path program 2 times [2022-11-16 12:48:28,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:28,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408056222] [2022-11-16 12:48:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:29,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408056222] [2022-11-16 12:48:29,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408056222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449596554] [2022-11-16 12:48:29,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:48:29,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:29,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:29,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:29,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:48:29,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:48:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:29,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 12:48:29,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:29,821 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 6 treesize of output 5 [2022-11-16 12:48:29,888 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 [2022-11-16 12:48:30,610 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:48:30,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-16 12:48:30,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:48:31,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 12:48:31,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 12:48:31,883 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-11-16 12:48:31,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:48:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:32,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:34,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:48:34,199 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-11-16 12:48:34,210 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 30 treesize of output 26 [2022-11-16 12:48:34,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:48:34,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-11-16 12:48:34,257 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 9 treesize of output 7 [2022-11-16 12:48:34,270 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 11 treesize of output 7 [2022-11-16 12:48:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449596554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:34,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:34,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 19] total 46 [2022-11-16 12:48:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590661576] [2022-11-16 12:48:34,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:34,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:48:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:48:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1978, Unknown=8, NotChecked=0, Total=2162 [2022-11-16 12:48:34,458 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 47 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 39 states have internal predecessors, (55), 9 states have call successors, (9), 8 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:35,885 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-11-16 12:48:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:48:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 39 states have internal predecessors, (55), 9 states have call successors, (9), 8 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 24 [2022-11-16 12:48:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:35,887 INFO L225 Difference]: With dead ends: 64 [2022-11-16 12:48:35,887 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 12:48:35,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=314, Invalid=3100, Unknown=8, NotChecked=0, Total=3422 [2022-11-16 12:48:35,890 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:35,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 517 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2022-11-16 12:48:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 12:48:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-16 12:48:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 57 states have internal predecessors, (58), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-11-16 12:48:35,895 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 24 [2022-11-16 12:48:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:35,895 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-11-16 12:48:35,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 39 states have internal predecessors, (55), 9 states have call successors, (9), 8 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-11-16 12:48:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:48:35,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:35,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:35,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:48:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:48:36,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1075569396, now seen corresponding path program 1 times [2022-11-16 12:48:36,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850250364] [2022-11-16 12:48:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:36,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:36,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:36,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850250364] [2022-11-16 12:48:36,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850250364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:36,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:36,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:48:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759107394] [2022-11-16 12:48:36,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:36,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:48:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:36,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:48:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:48:36,223 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2022-11-16 12:48:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:36,288 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-16 12:48:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:48:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 23 [2022-11-16 12:48:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:36,290 INFO L225 Difference]: With dead ends: 63 [2022-11-16 12:48:36,291 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 12:48:36,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:48:36,292 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:36,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:48:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 12:48:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-16 12:48:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 56 states have internal predecessors, (57), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-16 12:48:36,297 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 23 [2022-11-16 12:48:36,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:36,298 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-16 12:48:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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) [2022-11-16 12:48:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-16 12:48:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:48:36,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:36,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:36,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:48:36,301 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:36,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1017087012, now seen corresponding path program 1 times [2022-11-16 12:48:36,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:36,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156254790] [2022-11-16 12:48:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:36,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:36,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:36,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156254790] [2022-11-16 12:48:36,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156254790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:36,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:36,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:48:36,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996308627] [2022-11-16 12:48:36,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:36,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:48:36,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:48:36,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:48:36,481 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-11-16 12:48:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:36,664 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-11-16 12:48:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:48:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 24 [2022-11-16 12:48:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:36,666 INFO L225 Difference]: With dead ends: 62 [2022-11-16 12:48:36,666 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 12:48:36,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:48:36,667 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:36,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 95 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 12:48:36,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-16 12:48:36,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 55 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 12:48:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-11-16 12:48:36,672 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 24 [2022-11-16 12:48:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:36,672 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-11-16 12:48:36,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-11-16 12:48:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-11-16 12:48:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 12:48:36,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:36,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:48:36,674 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:36,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1464926217, now seen corresponding path program 1 times [2022-11-16 12:48:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:36,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893733725] [2022-11-16 12:48:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:36,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:48:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:36,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893733725] [2022-11-16 12:48:36,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893733725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:48:36,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:48:36,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:48:36,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189943793] [2022-11-16 12:48:36,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:48:36,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:48:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:48:36,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:48:36,983 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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) [2022-11-16 12:48:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:37,341 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-11-16 12:48:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:48:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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 25 [2022-11-16 12:48:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:37,343 INFO L225 Difference]: With dead ends: 61 [2022-11-16 12:48:37,343 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 12:48:37,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:48:37,344 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:37,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:48:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 12:48:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-16 12:48:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2022-11-16 12:48:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-11-16 12:48:37,347 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 25 [2022-11-16 12:48:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:37,348 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-11-16 12:48:37,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 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) [2022-11-16 12:48:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-11-16 12:48:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 12:48:37,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:48:37,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:37,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 12:48:37,350 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-16 12:48:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:48:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1399214858, now seen corresponding path program 2 times [2022-11-16 12:48:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:48:37,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828667721] [2022-11-16 12:48:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:48:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:48:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:48:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:38,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:48:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828667721] [2022-11-16 12:48:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828667721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:48:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711469801] [2022-11-16 12:48:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:48:38,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:48:38,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:48:38,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:48:38,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:48:38,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:48:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:48:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 12:48:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:48:38,649 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 6 treesize of output 5 [2022-11-16 12:48:38,660 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 6 treesize of output 5 [2022-11-16 12:48:38,779 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:48:38,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2022-11-16 12:48:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-16 12:48:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:40,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:48:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:48:41,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711469801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:48:41,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:48:41,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2022-11-16 12:48:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274958071] [2022-11-16 12:48:41,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:48:41,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 12:48:41,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:48:41,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 12:48:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:48:41,415 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 44 states, 40 states have (on average 1.95) internal successors, (78), 32 states have internal predecessors, (78), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:48:43,128 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-11-16 12:48:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:48:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 1.95) internal successors, (78), 32 states have internal predecessors, (78), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 12:48:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:48:43,129 INFO L225 Difference]: With dead ends: 39 [2022-11-16 12:48:43,129 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 12:48:43,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=407, Invalid=3015, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:48:43,132 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 164 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:48:43,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 151 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 314 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-16 12:48:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 12:48:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 12:48:43,134 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) [2022-11-16 12:48:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 12:48:43,134 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2022-11-16 12:48:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:48:43,135 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:48:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 1.95) internal successors, (78), 32 states have internal predecessors, (78), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:48:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:48:43,136 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 12:48:43,139 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec_strcopy_helperErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2022-11-16 12:48:43,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec_strcopy_helperErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2022-11-16 12:48:43,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec_strcopy_helperErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2022-11-16 12:48:43,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec_strcopy_helperErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2022-11-16 12:48:43,140 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec_strcopy_helperErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2022-11-16 12:48:43,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec_strcopy_helperErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2022-11-16 12:48:43,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2022-11-16 12:48:43,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2022-11-16 12:48:43,141 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (6 of 15 remaining) [2022-11-16 12:48:43,142 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (5 of 15 remaining) [2022-11-16 12:48:43,142 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (4 of 15 remaining) [2022-11-16 12:48:43,142 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (3 of 15 remaining) [2022-11-16 12:48:43,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (2 of 15 remaining) [2022-11-16 12:48:43,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (1 of 15 remaining) [2022-11-16 12:48:43,143 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2022-11-16 12:48:43,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 12:48:43,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:48:43,353 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:48:43,355 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 12:48:43,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:48:43 BoogieIcfgContainer [2022-11-16 12:48:43,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 12:48:43,360 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 12:48:43,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 12:48:43,360 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 12:48:43,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:48:12" (3/4) ... [2022-11-16 12:48:43,367 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 12:48:43,375 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec_strcopy_helper [2022-11-16 12:48:43,381 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-16 12:48:43,381 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-16 12:48:43,381 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 12:48:43,382 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 12:48:43,450 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 12:48:43,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 12:48:43,451 INFO L158 Benchmark]: Toolchain (without parser) took 31882.69ms. Allocated memory was 113.2MB in the beginning and 299.9MB in the end (delta: 186.6MB). Free memory was 71.1MB in the beginning and 158.4MB in the end (delta: -87.3MB). Peak memory consumption was 99.5MB. Max. memory is 16.1GB. [2022-11-16 12:48:43,452 INFO L158 Benchmark]: CDTParser took 2.22ms. Allocated memory is still 113.2MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:48:43,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.02ms. Allocated memory is still 113.2MB. Free memory was 70.9MB in the beginning and 89.3MB in the end (delta: -18.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:48:43,461 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.30ms. Allocated memory is still 113.2MB. Free memory was 88.9MB in the beginning and 87.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:48:43,462 INFO L158 Benchmark]: Boogie Preprocessor took 50.88ms. Allocated memory is still 113.2MB. Free memory was 87.5MB in the beginning and 86.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:48:43,462 INFO L158 Benchmark]: RCFGBuilder took 615.92ms. Allocated memory is still 113.2MB. Free memory was 86.3MB in the beginning and 73.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 12:48:43,463 INFO L158 Benchmark]: TraceAbstraction took 30734.87ms. Allocated memory was 113.2MB in the beginning and 299.9MB in the end (delta: 186.6MB). Free memory was 72.5MB in the beginning and 161.0MB in the end (delta: -88.5MB). Peak memory consumption was 101.8MB. Max. memory is 16.1GB. [2022-11-16 12:48:43,465 INFO L158 Benchmark]: Witness Printer took 90.87ms. Allocated memory is still 299.9MB. Free memory was 161.0MB in the beginning and 158.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 12:48:43,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.22ms. Allocated memory is still 113.2MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.02ms. Allocated memory is still 113.2MB. Free memory was 70.9MB in the beginning and 89.3MB in the end (delta: -18.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.30ms. Allocated memory is still 113.2MB. Free memory was 88.9MB in the beginning and 87.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 50.88ms. Allocated memory is still 113.2MB. Free memory was 87.5MB in the beginning and 86.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 615.92ms. Allocated memory is still 113.2MB. Free memory was 86.3MB in the beginning and 73.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 30734.87ms. Allocated memory was 113.2MB in the beginning and 299.9MB in the end (delta: 186.6MB). Free memory was 72.5MB in the beginning and 161.0MB in the end (delta: -88.5MB). Peak memory consumption was 101.8MB. Max. memory is 16.1GB. * Witness Printer took 90.87ms. Allocated memory is still 299.9MB. Free memory was 161.0MB in the beginning and 158.4MB in the end (delta: 2.6MB). 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: -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: 43]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 43]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 43]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 44]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 44]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 44]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 33]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 43 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 30.6s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 925 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 917 mSDsluCounter, 3151 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 414 IncrementalHoareTripleChecker+Unchecked, 2573 mSDsCounter, 121 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1675 IncrementalHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 121 mSolverCounterUnsat, 578 mSDtfsCounter, 1675 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 428 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 15.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=11, InterpolantAutomatonStates: 183, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 71 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.8s InterpolantComputationTime, 441 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 503 ConstructedInterpolants, 55 QuantifiedInterpolants, 6700 SizeOfPredicates, 103 NumberOfNonLiveVariables, 644 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 17 PerfectInterpolantSequences, 21/145 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 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-16 12:48:43,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d7b304-1292-4744-9aef-de5a628eebbf/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE