./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcpy_malloc.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcpy_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b3793c1153138718c278bf2758234e75646fb19e62e98d110099399474912470 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:37:39,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:37:39,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:37:39,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:37:39,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:37:39,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:37:39,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:37:39,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:37:39,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:37:39,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:37:39,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:37:39,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:37:39,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:37:39,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:37:39,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:37:39,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:37:39,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:37:39,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:37:39,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:37:39,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:37:39,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:37:39,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:37:39,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:37:39,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:37:39,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:37:39,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:37:39,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:37:39,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:37:39,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:37:39,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:37:39,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:37:39,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:37:40,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:37:40,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:37:40,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:37:40,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:37:40,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:37:40,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:37:40,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:37:40,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:37:40,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:37:40,004 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-12-13 16:37:40,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:37:40,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:37:40,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:37:40,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:37:40,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:37:40,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:37:40,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:37:40,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:37:40,026 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:37:40,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:37:40,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 16:37:40,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:37:40,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:37:40,027 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 16:37:40,027 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 16:37:40,027 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 16:37:40,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:37:40,027 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 16:37:40,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:37:40,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:37:40,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:37:40,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:37:40,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:37:40,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:37:40,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:37:40,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:37:40,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:37:40,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:37:40,029 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:37:40,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:37:40,029 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:37:40,030 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3793c1153138718c278bf2758234e75646fb19e62e98d110099399474912470 [2022-12-13 16:37:40,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:37:40,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:37:40,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:37:40,233 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:37:40,234 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:37:40,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-15/cstrcpy_malloc.i [2022-12-13 16:37:42,830 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:37:43,030 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:37:43,030 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/sv-benchmarks/c/termination-15/cstrcpy_malloc.i [2022-12-13 16:37:43,037 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/data/34e50c130/12c7752921e04555b53b0a7180b18b1a/FLAG7528d28c7 [2022-12-13 16:37:43,048 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/data/34e50c130/12c7752921e04555b53b0a7180b18b1a [2022-12-13 16:37:43,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:37:43,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:37:43,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:37:43,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:37:43,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:37:43,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb3d87c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43, skipping insertion in model container [2022-12-13 16:37:43,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:37:43,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:37:43,293 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:37:43,300 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:37:43,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:37:43,343 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:37:43,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43 WrapperNode [2022-12-13 16:37:43,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:37:43,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:37:43,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:37:43,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:37:43,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,371 INFO L138 Inliner]: procedures = 152, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-13 16:37:43,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:37:43,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:37:43,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:37:43,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:37:43,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:37:43,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:37:43,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:37:43,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:37:43,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (1/1) ... [2022-12-13 16:37:43,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:37:43,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:43,413 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:37:43,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:37:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:37:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:37:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:37:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:37:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:37:43,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:37:43,501 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:37:43,503 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:37:43,647 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:37:43,651 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:37:43,651 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 16:37:43,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:37:43 BoogieIcfgContainer [2022-12-13 16:37:43,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:37:43,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:37:43,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:37:43,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:37:43,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:37:43" (1/3) ... [2022-12-13 16:37:43,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4362cbbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:37:43, skipping insertion in model container [2022-12-13 16:37:43,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:37:43" (2/3) ... [2022-12-13 16:37:43,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4362cbbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:37:43, skipping insertion in model container [2022-12-13 16:37:43,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:37:43" (3/3) ... [2022-12-13 16:37:43,664 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy_malloc.i [2022-12-13 16:37:43,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:37:43,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-13 16:37:43,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:37:43,722 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51410e8f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:37:43,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-13 16:37:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:37:43,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:43,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:43,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash 889510835, now seen corresponding path program 1 times [2022-12-13 16:37:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:43,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357082542] [2022-12-13 16:37:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:43,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:43,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:43,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357082542] [2022-12-13 16:37:43,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357082542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:43,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:43,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:37:43,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063436681] [2022-12-13 16:37:43,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:43,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:37:43,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:37:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:37:43,904 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:43,947 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-12-13 16:37:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:37:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 16:37:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:43,955 INFO L225 Difference]: With dead ends: 40 [2022-12-13 16:37:43,955 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 16:37:43,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:43,959 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:43,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 16:37:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-12-13 16:37:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-12-13 16:37:43,983 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 6 [2022-12-13 16:37:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:43,983 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-12-13 16:37:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:43,983 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-12-13 16:37:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:37:43,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:43,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:43,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:37:43,984 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:43,985 INFO L85 PathProgramCache]: Analyzing trace with hash 889510859, now seen corresponding path program 1 times [2022-12-13 16:37:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:43,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871911846] [2022-12-13 16:37:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871911846] [2022-12-13 16:37:44,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871911846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:37:44,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933589468] [2022-12-13 16:37:44,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:44,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:44,066 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,093 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-12-13 16:37:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:44,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 16:37:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,094 INFO L225 Difference]: With dead ends: 33 [2022-12-13 16:37:44,094 INFO L226 Difference]: Without dead ends: 33 [2022-12-13 16:37:44,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:44,095 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-13 16:37:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-13 16:37:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-12-13 16:37:44,098 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-12-13 16:37:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,099 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-12-13 16:37:44,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-12-13 16:37:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:37:44,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:37:44,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash 889510860, now seen corresponding path program 1 times [2022-12-13 16:37:44,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66724611] [2022-12-13 16:37:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66724611] [2022-12-13 16:37:44,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66724611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:37:44,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584942020] [2022-12-13 16:37:44,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:37:44,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:37:44,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:37:44,260 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,300 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-12-13 16:37:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:37:44,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 16:37:44,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,301 INFO L225 Difference]: With dead ends: 58 [2022-12-13 16:37:44,301 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 16:37:44,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:37:44,302 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 16:37:44,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2022-12-13 16:37:44,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.696969696969697) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-12-13 16:37:44,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 6 [2022-12-13 16:37:44,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,307 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-12-13 16:37:44,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-12-13 16:37:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:37:44,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:37:44,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash 889512757, now seen corresponding path program 1 times [2022-12-13 16:37:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078006474] [2022-12-13 16:37:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078006474] [2022-12-13 16:37:44,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078006474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:37:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676834372] [2022-12-13 16:37:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:44,327 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,345 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-12-13 16:37:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:44,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 16:37:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,346 INFO L225 Difference]: With dead ends: 46 [2022-12-13 16:37:44,346 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 16:37:44,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:44,347 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 16:37:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-13 16:37:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-12-13 16:37:44,351 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 6 [2022-12-13 16:37:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,351 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-12-13 16:37:44,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-12-13 16:37:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 16:37:44,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:37:44,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,352 INFO L85 PathProgramCache]: Analyzing trace with hash 889512782, now seen corresponding path program 1 times [2022-12-13 16:37:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220363261] [2022-12-13 16:37:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220363261] [2022-12-13 16:37:44,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220363261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:37:44,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219330011] [2022-12-13 16:37:44,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:37:44,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:37:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:44,483 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,518 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-12-13 16:37:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:37:44,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 16:37:44,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,519 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:37:44,519 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 16:37:44,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:44,521 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 16:37:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-12-13 16:37:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-12-13 16:37:44,523 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 6 [2022-12-13 16:37:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,524 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-12-13 16:37:44,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-12-13 16:37:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 16:37:44,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:37:44,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,525 INFO L85 PathProgramCache]: Analyzing trace with hash -530222641, now seen corresponding path program 1 times [2022-12-13 16:37:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31386691] [2022-12-13 16:37:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31386691] [2022-12-13 16:37:44,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31386691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:37:44,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057882256] [2022-12-13 16:37:44,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:37:44,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:37:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:44,585 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,624 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-12-13 16:37:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:37:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 16:37:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,625 INFO L225 Difference]: With dead ends: 29 [2022-12-13 16:37:44,625 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 16:37:44,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:37:44,625 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 16:37:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-13 16:37:44,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-13 16:37:44,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 9 [2022-12-13 16:37:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,628 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-13 16:37:44,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-13 16:37:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 16:37:44,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:37:44,628 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -530222640, now seen corresponding path program 1 times [2022-12-13 16:37:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671330170] [2022-12-13 16:37:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671330170] [2022-12-13 16:37:44,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671330170] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:37:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936519944] [2022-12-13 16:37:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:37:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:37:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:37:44,752 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,810 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-12-13 16:37:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:37:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 16:37:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,811 INFO L225 Difference]: With dead ends: 35 [2022-12-13 16:37:44,811 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 16:37:44,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:37:44,812 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 63 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 16:37:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-12-13 16:37:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-12-13 16:37:44,814 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 9 [2022-12-13 16:37:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,814 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-12-13 16:37:44,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-12-13 16:37:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 16:37:44,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:37:44,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash 742967315, now seen corresponding path program 1 times [2022-12-13 16:37:44,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228882854] [2022-12-13 16:37:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:44,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:44,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228882854] [2022-12-13 16:37:44,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228882854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:44,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:44,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:37:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533088460] [2022-12-13 16:37:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:44,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:37:44,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:37:44,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:37:44,930 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:44,971 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-12-13 16:37:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 16:37:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 16:37:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:44,971 INFO L225 Difference]: With dead ends: 29 [2022-12-13 16:37:44,972 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 16:37:44,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:37:44,972 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:44,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 16:37:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-13 16:37:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-13 16:37:44,974 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2022-12-13 16:37:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:44,975 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-13 16:37:44,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-13 16:37:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 16:37:44,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:44,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:44,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:37:44,975 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 742967316, now seen corresponding path program 1 times [2022-12-13 16:37:44,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:44,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714542470] [2022-12-13 16:37:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:44,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:45,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:45,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714542470] [2022-12-13 16:37:45,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714542470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:45,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:45,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:37:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177161909] [2022-12-13 16:37:45,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:45,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:37:45,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:45,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:37:45,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:37:45,098 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:45,201 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-12-13 16:37:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:37:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 16:37:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:45,202 INFO L225 Difference]: With dead ends: 56 [2022-12-13 16:37:45,202 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 16:37:45,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:37:45,203 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:45,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:37:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 16:37:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2022-12-13 16:37:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-13 16:37:45,207 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 10 [2022-12-13 16:37:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:45,207 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-13 16:37:45,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-13 16:37:45,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 16:37:45,208 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:45,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:45,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:37:45,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:45,209 INFO L85 PathProgramCache]: Analyzing trace with hash -66379310, now seen corresponding path program 1 times [2022-12-13 16:37:45,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:45,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508236482] [2022-12-13 16:37:45,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:45,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508236482] [2022-12-13 16:37:45,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508236482] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:45,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:45,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:37:45,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522329674] [2022-12-13 16:37:45,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:37:45,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:37:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:37:45,359 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:45,448 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-12-13 16:37:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 16:37:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 16:37:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:45,449 INFO L225 Difference]: With dead ends: 45 [2022-12-13 16:37:45,449 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 16:37:45,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:37:45,450 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:45,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 33 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 16:37:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2022-12-13 16:37:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-13 16:37:45,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2022-12-13 16:37:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:45,454 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-13 16:37:45,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-13 16:37:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 16:37:45,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:45,454 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:45,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:37:45,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1772813464, now seen corresponding path program 1 times [2022-12-13 16:37:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600459127] [2022-12-13 16:37:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600459127] [2022-12-13 16:37:45,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600459127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:45,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:45,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 16:37:45,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570920631] [2022-12-13 16:37:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:45,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:37:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:37:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:37:45,621 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:45,703 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-12-13 16:37:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:37:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 13 [2022-12-13 16:37:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:45,704 INFO L225 Difference]: With dead ends: 49 [2022-12-13 16:37:45,704 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 16:37:45,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:37:45,705 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:45,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 122 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 16:37:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2022-12-13 16:37:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-13 16:37:45,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 13 [2022-12-13 16:37:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:45,708 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-13 16:37:45,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-13 16:37:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 16:37:45,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:45,709 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:45,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:37:45,709 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1379786454, now seen corresponding path program 1 times [2022-12-13 16:37:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:45,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822714920] [2022-12-13 16:37:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:45,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:45,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822714920] [2022-12-13 16:37:45,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822714920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:45,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:45,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 16:37:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506229520] [2022-12-13 16:37:45,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:45,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:37:45,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:37:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:37:45,856 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:45,958 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-12-13 16:37:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:37:45,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 13 [2022-12-13 16:37:45,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:45,959 INFO L225 Difference]: With dead ends: 64 [2022-12-13 16:37:45,960 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 16:37:45,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:37:45,960 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:45,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 144 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:45,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 16:37:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2022-12-13 16:37:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-12-13 16:37:45,964 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 13 [2022-12-13 16:37:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:45,964 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-12-13 16:37:45,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-12-13 16:37:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 16:37:45,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:45,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:45,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:37:45,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2080851032, now seen corresponding path program 1 times [2022-12-13 16:37:45,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:45,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289468561] [2022-12-13 16:37:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:46,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:46,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289468561] [2022-12-13 16:37:46,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289468561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:46,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112280428] [2022-12-13 16:37:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:46,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:46,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:46,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:46,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:37:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 16:37:46,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:46,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 16:37:46,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:37:46,490 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 20 treesize of output 17 [2022-12-13 16:37:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:46,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:46,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 16:37:46,816 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 20 treesize of output 16 [2022-12-13 16:37:46,822 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 39 treesize of output 31 [2022-12-13 16:37:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:46,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112280428] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:46,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:46,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 16:37:46,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541916558] [2022-12-13 16:37:46,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:46,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 16:37:46,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 16:37:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 16:37:46,833 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:47,618 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-12-13 16:37:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:37:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 16:37:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:47,620 INFO L225 Difference]: With dead ends: 43 [2022-12-13 16:37:47,620 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 16:37:47,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:37:47,621 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:47,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 203 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:37:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 16:37:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-12-13 16:37:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-13 16:37:47,624 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 13 [2022-12-13 16:37:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:47,624 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-13 16:37:47,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-13 16:37:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 16:37:47,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:47,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:47,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:37:47,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:47,826 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 81872524, now seen corresponding path program 1 times [2022-12-13 16:37:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179941457] [2022-12-13 16:37:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179941457] [2022-12-13 16:37:48,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179941457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853008628] [2022-12-13 16:37:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:48,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:48,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:48,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:37:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:48,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 16:37:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:48,277 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 16:37:48,277 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 16:37:48,292 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 10 treesize of output 8 [2022-12-13 16:37:48,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 16:37:48,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:37:48,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-12-13 16:37:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:48,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:48,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 16:37:48,884 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 14 treesize of output 12 [2022-12-13 16:37:48,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:37:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:49,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853008628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:49,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:49,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 16:37:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307400329] [2022-12-13 16:37:49,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 16:37:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 16:37:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2022-12-13 16:37:49,018 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:50,254 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-12-13 16:37:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 16:37:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 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 14 [2022-12-13 16:37:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:50,255 INFO L225 Difference]: With dead ends: 42 [2022-12-13 16:37:50,255 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 16:37:50,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 16:37:50,256 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 310 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:50,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 107 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:37:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 16:37:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-12-13 16:37:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-12-13 16:37:50,259 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 14 [2022-12-13 16:37:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:50,259 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-12-13 16:37:50,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-12-13 16:37:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 16:37:50,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:50,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:50,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:37:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:37:50,462 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1429662826, now seen corresponding path program 1 times [2022-12-13 16:37:50,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:50,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173951327] [2022-12-13 16:37:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:50,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:50,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:50,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173951327] [2022-12-13 16:37:50,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173951327] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:50,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:50,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:37:50,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751380963] [2022-12-13 16:37:50,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:50,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:50,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:50,535 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:50,559 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-12-13 16:37:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:50,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2022-12-13 16:37:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:50,560 INFO L225 Difference]: With dead ends: 38 [2022-12-13 16:37:50,560 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 16:37:50,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:50,561 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:50,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 16:37:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-13 16:37:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-12-13 16:37:50,563 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 15 [2022-12-13 16:37:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:50,564 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-12-13 16:37:50,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-12-13 16:37:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 16:37:50,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:50,564 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:50,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 16:37:50,565 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:50,565 INFO L85 PathProgramCache]: Analyzing trace with hash -477082848, now seen corresponding path program 2 times [2022-12-13 16:37:50,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:50,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441986243] [2022-12-13 16:37:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:50,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441986243] [2022-12-13 16:37:51,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441986243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530114937] [2022-12-13 16:37:51,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:37:51,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:51,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:51,011 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:51,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:37:51,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:37:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:37:51,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 16:37:51,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:51,087 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 10 treesize of output 8 [2022-12-13 16:37:51,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 16:37:51,321 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 26 treesize of output 26 [2022-12-13 16:37:51,508 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-12-13 16:37:51,508 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 30 treesize of output 28 [2022-12-13 16:37:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:51,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:54,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:37:54,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-12-13 16:37:54,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-13 16:37:54,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-12-13 16:37:54,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 16:37:54,148 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 [2022-12-13 16:37:54,200 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 10 treesize of output 8 [2022-12-13 16:37:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:54,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530114937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:54,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:54,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-12-13 16:37:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112975756] [2022-12-13 16:37:54,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:54,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 16:37:54,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 16:37:54,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1015, Unknown=3, NotChecked=0, Total=1122 [2022-12-13 16:37:54,213 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:56,473 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-12-13 16:37:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:37:56,474 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 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 17 [2022-12-13 16:37:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:56,474 INFO L225 Difference]: With dead ends: 56 [2022-12-13 16:37:56,474 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 16:37:56,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=321, Invalid=1932, Unknown=3, NotChecked=0, Total=2256 [2022-12-13 16:37:56,475 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:56,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 227 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 16:37:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 16:37:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2022-12-13 16:37:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-12-13 16:37:56,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2022-12-13 16:37:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:56,477 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-12-13 16:37:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-12-13 16:37:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 16:37:56,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:56,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:56,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:37:56,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:37:56,678 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:56,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:56,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2105505565, now seen corresponding path program 1 times [2022-12-13 16:37:56,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:56,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345727046] [2022-12-13 16:37:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:56,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345727046] [2022-12-13 16:37:56,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345727046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:56,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:56,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:37:56,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992203882] [2022-12-13 16:37:56,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:56,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:37:56,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:37:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:56,697 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:56,707 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-12-13 16:37:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:37:56,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 16:37:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:56,708 INFO L225 Difference]: With dead ends: 41 [2022-12-13 16:37:56,708 INFO L226 Difference]: Without dead ends: 41 [2022-12-13 16:37:56,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:37:56,709 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-13 16:37:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-13 16:37:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-12-13 16:37:56,711 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 18 [2022-12-13 16:37:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:56,711 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-12-13 16:37:56,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-12-13 16:37:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 16:37:56,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:56,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:56,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 16:37:56,712 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 846163162, now seen corresponding path program 1 times [2022-12-13 16:37:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762248591] [2022-12-13 16:37:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:56,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:56,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762248591] [2022-12-13 16:37:56,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762248591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:56,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:56,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:37:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953083731] [2022-12-13 16:37:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:56,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:37:56,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:37:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:56,778 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:56,797 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-12-13 16:37:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:37:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-12-13 16:37:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:56,797 INFO L225 Difference]: With dead ends: 40 [2022-12-13 16:37:56,798 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 16:37:56,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:56,798 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:56,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 16:37:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-13 16:37:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-12-13 16:37:56,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2022-12-13 16:37:56,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:56,801 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-12-13 16:37:56,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-12-13 16:37:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 16:37:56,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:56,802 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] [2022-12-13 16:37:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 16:37:56,802 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 461254336, now seen corresponding path program 1 times [2022-12-13 16:37:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:56,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747806785] [2022-12-13 16:37:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:56,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:56,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:56,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747806785] [2022-12-13 16:37:56,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747806785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:37:56,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:37:56,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:37:56,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037377983] [2022-12-13 16:37:56,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:37:56,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:37:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:37:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:37:56,894 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:37:56,959 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-12-13 16:37:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:37:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2022-12-13 16:37:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:37:56,959 INFO L225 Difference]: With dead ends: 39 [2022-12-13 16:37:56,960 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 16:37:56,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:37:56,960 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:37:56,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:37:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 16:37:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-13 16:37:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-12-13 16:37:56,962 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-12-13 16:37:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:37:56,962 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-12-13 16:37:56,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:37:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-12-13 16:37:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 16:37:56,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:37:56,963 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:56,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 16:37:56,963 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 16:37:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:56,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1104630296, now seen corresponding path program 3 times [2022-12-13 16:37:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:56,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679213691] [2022-12-13 16:37:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:56,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:57,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679213691] [2022-12-13 16:37:57,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679213691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:57,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735671525] [2022-12-13 16:37:57,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:37:57,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:57,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:57,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:57,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:37:57,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 16:37:57,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:37:57,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 16:37:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:57,641 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 10 treesize of output 8 [2022-12-13 16:37:57,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 16:37:57,922 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 24 treesize of output 24 [2022-12-13 16:37:58,686 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 32 treesize of output 30 [2022-12-13 16:37:59,290 INFO L321 Elim1Store]: treesize reduction 8, result has 87.3 percent of original size [2022-12-13 16:37:59,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-12-13 16:37:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:59,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:38:03,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:38:03,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 44 [2022-12-13 16:38:03,111 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-12-13 16:38:03,111 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 2 case distinctions, treesize of input 34 treesize of output 39 [2022-12-13 16:38:03,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:38:03,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 90 [2022-12-13 16:38:03,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 16:38:03,170 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 [2022-12-13 16:38:03,182 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 [2022-12-13 16:38:03,595 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 10 treesize of output 8 [2022-12-13 16:38:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:38:03,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735671525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:38:03,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:38:03,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 46 [2022-12-13 16:38:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675536659] [2022-12-13 16:38:03,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:38:03,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 16:38:03,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 16:38:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1988, Unknown=18, NotChecked=0, Total=2162 [2022-12-13 16:38:03,612 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:13,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:38:15,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:38:27,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:38:29,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 16:38:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:38:33,691 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-12-13 16:38:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 16:38:33,692 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 states have internal predecessors, (56), 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 21 [2022-12-13 16:38:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:38:33,692 INFO L225 Difference]: With dead ends: 23 [2022-12-13 16:38:33,692 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 16:38:33,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=511, Invalid=3372, Unknown=23, NotChecked=0, Total=3906 [2022-12-13 16:38:33,693 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 24 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:38:33,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 94 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 353 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2022-12-13 16:38:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 16:38:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 16:38:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 16:38:33,694 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2022-12-13 16:38:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:38:33,694 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 16:38:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 16:38:33,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 16:38:33,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-12-13 16:38:33,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-12-13 16:38:33,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-12-13 16:38:33,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-12-13 16:38:33,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (6 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (5 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (4 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (3 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (2 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (1 of 13 remaining) [2022-12-13 16:38:33,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-12-13 16:38:33,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:38:33,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:38:33,904 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:38:33,906 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 16:38:33,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 04:38:33 BoogieIcfgContainer [2022-12-13 16:38:33,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 16:38:33,908 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 16:38:33,908 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 16:38:33,908 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 16:38:33,908 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:37:43" (3/4) ... [2022-12-13 16:38:33,910 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 16:38:33,917 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-12-13 16:38:33,917 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-13 16:38:33,917 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 16:38:33,917 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 16:38:33,938 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 16:38:33,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 16:38:33,939 INFO L158 Benchmark]: Toolchain (without parser) took 50887.45ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 113.2MB in the beginning and 99.9MB in the end (delta: 13.3MB). Peak memory consumption was 44.6MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,939 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 58.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 16:38:33,939 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.95ms. Allocated memory is still 144.7MB. Free memory was 112.5MB in the beginning and 95.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,939 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.13ms. Allocated memory is still 144.7MB. Free memory was 95.2MB in the beginning and 93.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,939 INFO L158 Benchmark]: Boogie Preprocessor took 15.82ms. Allocated memory is still 144.7MB. Free memory was 93.8MB in the beginning and 92.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,939 INFO L158 Benchmark]: RCFGBuilder took 264.50ms. Allocated memory is still 144.7MB. Free memory was 92.4MB in the beginning and 79.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,940 INFO L158 Benchmark]: TraceAbstraction took 50251.19ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 78.5MB in the beginning and 102.7MB in the end (delta: -24.3MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,940 INFO L158 Benchmark]: Witness Printer took 30.48ms. Allocated memory is still 174.1MB. Free memory was 102.7MB in the beginning and 99.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 16:38:33,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 58.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.95ms. Allocated memory is still 144.7MB. Free memory was 112.5MB in the beginning and 95.2MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.13ms. Allocated memory is still 144.7MB. Free memory was 95.2MB in the beginning and 93.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.82ms. Allocated memory is still 144.7MB. Free memory was 93.8MB in the beginning and 92.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 264.50ms. Allocated memory is still 144.7MB. Free memory was 92.4MB in the beginning and 79.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 50251.19ms. Allocated memory was 144.7MB in the beginning and 174.1MB in the end (delta: 29.4MB). Free memory was 78.5MB in the beginning and 102.7MB in the end (delta: -24.3MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. * Witness Printer took 30.48ms. Allocated memory is still 174.1MB. Free memory was 102.7MB in the beginning and 99.9MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -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: 386]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 386]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 386]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 387]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 387]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 387]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 372]: 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 1 procedures, 35 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 50.2s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 35.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 1217 SdHoareTripleChecker+Valid, 9.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1217 mSDsluCounter, 1467 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1099 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1825 IncrementalHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 368 mSDtfsCounter, 1825 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 316 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 34.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=3, InterpolantAutomatonStates: 146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 20 MinimizatonAttempts, 121 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 343 ConstructedInterpolants, 40 QuantifiedInterpolants, 4449 SizeOfPredicates, 81 NumberOfNonLiveVariables, 583 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 28 InterpolantComputations, 16 PerfectInterpolantSequences, 5/97 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 16:38:34,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355988fe-ddab-424a-991d-f2d61d262f51/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE