./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/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_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/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_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/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 c2261b8075e5a5018e09c71b2ef98f1a55d20ac7ba7a361137d9c5ebaba61150 --- 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 20:06:59,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:06:59,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:06:59,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:06:59,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:06:59,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:06:59,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:06:59,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:06:59,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:06:59,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:06:59,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:06:59,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:06:59,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:06:59,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:06:59,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:06:59,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:06:59,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:06:59,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:06:59,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:06:59,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:06:59,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:06:59,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:06:59,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:06:59,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:06:59,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:06:59,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:06:59,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:06:59,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:06:59,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:06:59,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:06:59,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:06:59,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:06:59,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:06:59,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:06:59,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:06:59,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:06:59,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:06:59,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:06:59,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:06:59,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:06:59,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:06:59,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-12-13 20:06:59,229 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:06:59,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:06:59,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:06:59,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:06:59,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:06:59,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:06:59,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:06:59,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:06:59,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:06:59,231 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:06:59,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:06:59,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:06:59,232 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:06:59,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:06:59,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:06:59,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:06:59,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:06:59,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:06:59,233 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:06:59,233 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_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2261b8075e5a5018e09c71b2ef98f1a55d20ac7ba7a361137d9c5ebaba61150 [2022-12-13 20:06:59,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:06:59,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:06:59,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:06:59,426 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:06:59,427 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:06:59,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i [2022-12-13 20:07:02,017 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:07:02,211 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:07:02,211 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/sv-benchmarks/c/termination-15/cstrchr_reverse_alloca.i [2022-12-13 20:07:02,219 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/data/13a6a82eb/48a0a3d11c47412493b5f8d06ed351ab/FLAGf47306930 [2022-12-13 20:07:02,233 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/data/13a6a82eb/48a0a3d11c47412493b5f8d06ed351ab [2022-12-13 20:07:02,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:07:02,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:07:02,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:07:02,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:07:02,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:07:02,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ce066e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02, skipping insertion in model container [2022-12-13 20:07:02,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:07:02,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:07:02,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:07:02,472 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:07:02,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:07:02,517 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:07:02,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02 WrapperNode [2022-12-13 20:07:02,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:07:02,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:07:02,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:07:02,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:07:02,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,532 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,546 INFO L138 Inliner]: procedures = 152, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-12-13 20:07:02,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:07:02,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:07:02,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:07:02,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:07:02,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:07:02,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:07:02,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:07:02,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:07:02,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (1/1) ... [2022-12-13 20:07:02,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:07:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:02,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:07:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:07:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:07:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:07:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:07:02,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:07:02,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:07:02,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:07:02,676 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:07:02,678 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:07:02,784 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:07:02,790 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:07:02,790 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 20:07:02,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:07:02 BoogieIcfgContainer [2022-12-13 20:07:02,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:07:02,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:07:02,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:07:02,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:07:02,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:07:02" (1/3) ... [2022-12-13 20:07:02,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336813bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:07:02, skipping insertion in model container [2022-12-13 20:07:02,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:07:02" (2/3) ... [2022-12-13 20:07:02,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336813bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:07:02, skipping insertion in model container [2022-12-13 20:07:02,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:07:02" (3/3) ... [2022-12-13 20:07:02,798 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr_reverse_alloca.i [2022-12-13 20:07:02,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:07:02,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-12-13 20:07:02,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:07:02,851 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;@644bea52, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:07:02,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-13 20:07:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 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 20:07:02,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 20:07:02,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:02,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:07:02,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 28693828, now seen corresponding path program 1 times [2022-12-13 20:07:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406531102] [2022-12-13 20:07:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:03,045 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 20:07:03,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:03,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406531102] [2022-12-13 20:07:03,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406531102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:03,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:03,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:07:03,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358984026] [2022-12-13 20:07:03,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:07:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:03,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:07:03,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:07:03,083 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:03,122 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-12-13 20:07:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:07:03,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-13 20:07:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:03,132 INFO L225 Difference]: With dead ends: 26 [2022-12-13 20:07:03,132 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 20:07:03,133 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 20:07:03,136 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:03,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 20:07:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-13 20:07:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 23 states have internal predecessors, (26), 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 20:07:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-12-13 20:07:03,159 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 5 [2022-12-13 20:07:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:03,159 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-12-13 20:07:03,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-12-13 20:07:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 20:07:03,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:03,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:07:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:07:03,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash 28693829, now seen corresponding path program 1 times [2022-12-13 20:07:03,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:03,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887234649] [2022-12-13 20:07:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:03,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:03,322 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 20:07:03,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:03,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887234649] [2022-12-13 20:07:03,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887234649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:03,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:03,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:07:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513856996] [2022-12-13 20:07:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:03,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:07:03,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:07:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:07:03,326 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:03,370 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-12-13 20:07:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:07:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-13 20:07:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:03,371 INFO L225 Difference]: With dead ends: 44 [2022-12-13 20:07:03,371 INFO L226 Difference]: Without dead ends: 44 [2022-12-13 20:07:03,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:07:03,372 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:03,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 59 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-13 20:07:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2022-12-13 20:07:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 25 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 20:07:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-12-13 20:07:03,377 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 5 [2022-12-13 20:07:03,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:03,377 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-12-13 20:07:03,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-12-13 20:07:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 20:07:03,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:03,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 20:07:03,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:07:03,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:03,379 INFO L85 PathProgramCache]: Analyzing trace with hash 28695751, now seen corresponding path program 1 times [2022-12-13 20:07:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:03,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108371069] [2022-12-13 20:07:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:03,499 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 20:07:03,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:03,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108371069] [2022-12-13 20:07:03,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108371069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:03,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:03,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:07:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030778060] [2022-12-13 20:07:03,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:03,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:07:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:07:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:07:03,502 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:03,535 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-12-13 20:07:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:07:03,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-13 20:07:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:03,536 INFO L225 Difference]: With dead ends: 25 [2022-12-13 20:07:03,536 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 20:07:03,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:07:03,538 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:03,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:03,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 20:07:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-12-13 20:07:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.5625) internal successors, (25), 22 states have internal predecessors, (25), 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 20:07:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-12-13 20:07:03,541 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 5 [2022-12-13 20:07:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:03,541 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-12-13 20:07:03,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:03,542 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-12-13 20:07:03,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:07:03,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:03,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:03,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:07:03,543 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964393, now seen corresponding path program 1 times [2022-12-13 20:07:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372844875] [2022-12-13 20:07:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:03,589 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 20:07:03,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:03,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372844875] [2022-12-13 20:07:03,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372844875] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:03,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:03,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:07:03,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402609367] [2022-12-13 20:07:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:03,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:07:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:03,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:07:03,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:07:03,591 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 20:07:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:03,622 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-12-13 20:07:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:07:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-12-13 20:07:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:03,623 INFO L225 Difference]: With dead ends: 20 [2022-12-13 20:07:03,623 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 20:07:03,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:07:03,625 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:03,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 15 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 20:07:03,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-13 20:07:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 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 20:07:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-13 20:07:03,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2022-12-13 20:07:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:03,628 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-13 20:07:03,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 20:07:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-13 20:07:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:07:03,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:03,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:03,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:07:03,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964394, now seen corresponding path program 1 times [2022-12-13 20:07:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:03,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583367974] [2022-12-13 20:07:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:03,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:03,743 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 20:07:03,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:03,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583367974] [2022-12-13 20:07:03,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583367974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:03,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:03,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:07:03,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26788249] [2022-12-13 20:07:03,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:03,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:07:03,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:07:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:07:03,746 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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 20:07:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:03,809 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-12-13 20:07:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:07:03,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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 7 [2022-12-13 20:07:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:03,811 INFO L225 Difference]: With dead ends: 34 [2022-12-13 20:07:03,811 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 20:07:03,811 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 20:07:03,812 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:03,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 20:07:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2022-12-13 20:07:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 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 20:07:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-13 20:07:03,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 7 [2022-12-13 20:07:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:03,816 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-13 20:07:03,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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 20:07:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-13 20:07:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:07:03,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:03,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:03,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:07:03,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:03,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1806811436, now seen corresponding path program 1 times [2022-12-13 20:07:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:03,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564468449] [2022-12-13 20:07:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:03,993 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 20:07:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564468449] [2022-12-13 20:07:03,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564468449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:03,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:03,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:07:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919723738] [2022-12-13 20:07:03,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:07:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:07:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:07:03,996 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 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 20:07:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:04,034 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-12-13 20:07:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:07:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 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 7 [2022-12-13 20:07:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:04,035 INFO L225 Difference]: With dead ends: 23 [2022-12-13 20:07:04,035 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 20:07:04,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:07:04,036 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:04,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 22 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:04,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 20:07:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-12-13 20:07:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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 20:07:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-13 20:07:04,038 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 7 [2022-12-13 20:07:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:04,038 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-13 20:07:04,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 7 states have internal predecessors, (7), 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 20:07:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-13 20:07:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 20:07:04,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:04,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:04,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:07:04,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1531298047, now seen corresponding path program 1 times [2022-12-13 20:07:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150921251] [2022-12-13 20:07:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:04,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150921251] [2022-12-13 20:07:04,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150921251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:04,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:04,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:07:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609333341] [2022-12-13 20:07:04,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:04,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:07:04,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:07:04,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:07:04,056 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:04,063 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-12-13 20:07:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:07:04,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 20:07:04,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:04,064 INFO L225 Difference]: With dead ends: 20 [2022-12-13 20:07:04,064 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 20:07:04,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 20:07:04,065 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 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 20:07:04,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 20:07:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-13 20:07:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 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 20:07:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-13 20:07:04,067 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2022-12-13 20:07:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:04,067 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-13 20:07:04,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-13 20:07:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:07:04,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:04,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:04,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:07:04,068 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1590499358, now seen corresponding path program 1 times [2022-12-13 20:07:04,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:04,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583224390] [2022-12-13 20:07:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583224390] [2022-12-13 20:07:04,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583224390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:04,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:04,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:07:04,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870899952] [2022-12-13 20:07:04,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:04,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:07:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:07:04,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:07:04,220 INFO L87 Difference]: Start difference. First operand 20 states and 22 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 20:07:04,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:04,311 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-12-13 20:07:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:07:04,311 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 20:07:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:04,312 INFO L225 Difference]: With dead ends: 32 [2022-12-13 20:07:04,312 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 20:07:04,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:07:04,313 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:04,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 20:07:04,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-12-13 20:07:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 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 20:07:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-12-13 20:07:04,316 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 13 [2022-12-13 20:07:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:04,316 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-12-13 20:07:04,316 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 20:07:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-12-13 20:07:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:07:04,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:04,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:07:04,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2003403360, now seen corresponding path program 1 times [2022-12-13 20:07:04,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:04,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016028313] [2022-12-13 20:07:04,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016028313] [2022-12-13 20:07:04,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016028313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:04,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462922978] [2022-12-13 20:07:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:04,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:04,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:04,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:04,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:07:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:04,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:07:04,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:04,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:07:04,646 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 11 treesize of output 7 [2022-12-13 20:07:04,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:07:04,753 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 15 treesize of output 15 [2022-12-13 20:07:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:04,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:05,004 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 10 treesize of output 8 [2022-12-13 20:07:05,012 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 20:07:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:05,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462922978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:05,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:05,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2022-12-13 20:07:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138453547] [2022-12-13 20:07:05,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 20:07:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 20:07:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:07:05,050 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 20:07:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:05,538 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-12-13 20:07:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:07:05,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 20:07:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:05,539 INFO L225 Difference]: With dead ends: 54 [2022-12-13 20:07:05,539 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 20:07:05,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:07:05,539 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 212 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:05,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 94 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:07:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 20:07:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2022-12-13 20:07:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2) internal successors, (36), 31 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 20:07:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-12-13 20:07:05,542 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 13 [2022-12-13 20:07:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:05,542 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-12-13 20:07:05,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 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 20:07:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-12-13 20:07:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 20:07:05,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:05,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:05,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:07:05,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 20:07:05,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2053675818, now seen corresponding path program 1 times [2022-12-13 20:07:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527897792] [2022-12-13 20:07:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:05,796 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 20:07:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:05,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527897792] [2022-12-13 20:07:05,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527897792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:07:05,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:07:05,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:07:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386049401] [2022-12-13 20:07:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:07:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:07:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:07:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:07:05,798 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:05,811 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-12-13 20:07:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:07:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 20:07:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:05,812 INFO L225 Difference]: With dead ends: 31 [2022-12-13 20:07:05,812 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 20:07:05,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:07:05,812 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:05,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:07:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 20:07:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-13 20:07:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 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 20:07:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-12-13 20:07:05,814 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2022-12-13 20:07:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:05,814 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-12-13 20:07:05,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:07:05,814 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-12-13 20:07:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 20:07:05,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:07:05,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 20:07:05,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-13 20:07:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:07:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1985024788, now seen corresponding path program 2 times [2022-12-13 20:07:05,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:07:05,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195975281] [2022-12-13 20:07:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:07:05,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:07:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:07:06,046 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 20:07:06,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:07:06,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195975281] [2022-12-13 20:07:06,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195975281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:07:06,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947516927] [2022-12-13 20:07:06,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:07:06,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:07:06,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:07:06,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:07:06,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:07:06,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:07:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:07:06,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 20:07:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:07:06,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:07:06,116 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 11 treesize of output 7 [2022-12-13 20:07:06,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:07:06,194 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 15 treesize of output 15 [2022-12-13 20:07:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:07:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:07:06,616 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 10 treesize of output 8 [2022-12-13 20:07:06,620 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 20:07:06,646 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 20:07:06,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947516927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:07:06,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:07:06,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-13 20:07:06,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989986923] [2022-12-13 20:07:06,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:07:06,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:07:06,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:07:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:07:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:07:06,647 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 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 20:07:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:07:07,015 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-12-13 20:07:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 20:07:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 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 19 [2022-12-13 20:07:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:07:07,016 INFO L225 Difference]: With dead ends: 24 [2022-12-13 20:07:07,016 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 20:07:07,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:07:07,017 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:07:07,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 41 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:07:07,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 20:07:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 20:07:07,017 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 20:07:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 20:07:07,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2022-12-13 20:07:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:07:07,017 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 20:07:07,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 23 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 20:07:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 20:07:07,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 20:07:07,019 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-12-13 20:07:07,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-13 20:07:07,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:07:07,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 20:07:07,225 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:07:07,228 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 20:07:07,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 08:07:07 BoogieIcfgContainer [2022-12-13 20:07:07,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 20:07:07,234 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 20:07:07,235 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 20:07:07,235 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 20:07:07,236 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:07:02" (3/4) ... [2022-12-13 20:07:07,243 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 20:07:07,268 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-12-13 20:07:07,269 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 20:07:07,269 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 20:07:07,269 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 20:07:07,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 20:07:07,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 20:07:07,333 INFO L158 Benchmark]: Toolchain (without parser) took 5096.26ms. Allocated memory is still 161.5MB. Free memory was 125.9MB in the beginning and 115.5MB in the end (delta: 10.3MB). Peak memory consumption was 11.0MB. Max. memory is 16.1GB. [2022-12-13 20:07:07,333 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:07:07,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.78ms. Allocated memory is still 161.5MB. Free memory was 125.2MB in the beginning and 108.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 20:07:07,334 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.54ms. Allocated memory is still 161.5MB. Free memory was 107.8MB in the beginning and 106.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 20:07:07,334 INFO L158 Benchmark]: Boogie Preprocessor took 15.63ms. Allocated memory is still 161.5MB. Free memory was 106.3MB in the beginning and 104.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 20:07:07,335 INFO L158 Benchmark]: RCFGBuilder took 229.37ms. Allocated memory is still 161.5MB. Free memory was 104.9MB in the beginning and 93.1MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 20:07:07,335 INFO L158 Benchmark]: TraceAbstraction took 4439.78ms. Allocated memory is still 161.5MB. Free memory was 93.0MB in the beginning and 118.3MB in the end (delta: -25.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:07:07,335 INFO L158 Benchmark]: Witness Printer took 98.13ms. Allocated memory is still 161.5MB. Free memory was 118.3MB in the beginning and 115.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 20:07:07,338 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 85.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.78ms. Allocated memory is still 161.5MB. Free memory was 125.2MB in the beginning and 108.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.54ms. Allocated memory is still 161.5MB. Free memory was 107.8MB in the beginning and 106.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.63ms. Allocated memory is still 161.5MB. Free memory was 106.3MB in the beginning and 104.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 229.37ms. Allocated memory is still 161.5MB. Free memory was 104.9MB in the beginning and 93.1MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4439.78ms. Allocated memory is still 161.5MB. Free memory was 93.0MB in the beginning and 118.3MB in the end (delta: -25.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 98.13ms. Allocated memory is still 161.5MB. Free memory was 118.3MB in the beginning and 115.5MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 370]: 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, 27 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 463 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 463 mSDsluCounter, 444 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 284 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 470 IncrementalHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 160 mSDtfsCounter, 470 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=9, InterpolantAutomatonStates: 74, 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, 11 MinimizatonAttempts, 64 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 155 ConstructedInterpolants, 10 QuantifiedInterpolants, 1510 SizeOfPredicates, 21 NumberOfNonLiveVariables, 172 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 15 InterpolantComputations, 9 PerfectInterpolantSequences, 3/29 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 20:07:07,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ff0a2a-6dbd-432e-8764-4a80e6b3c036/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