./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 33d006375056e7e3c58d58b776bed0fedce081ec4ff9e691f038a741177fe7dd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:31:25,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:31:25,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:31:25,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:31:25,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:31:25,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:31:25,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:31:25,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:31:25,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:31:25,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:31:25,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:31:25,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:31:25,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:31:25,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:31:25,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:31:25,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:31:25,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:31:25,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:31:25,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:31:25,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:31:25,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:31:25,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:31:25,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:31:25,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:31:25,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:31:25,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:31:25,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:31:25,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:31:25,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:31:25,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:31:25,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:31:25,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:31:25,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:31:25,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:31:25,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:31:25,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:31:25,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:31:25,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:31:25,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:31:25,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:31:25,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:31:25,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-16 11:31:25,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:31:25,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:31:25,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:31:25,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:31:25,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:31:25,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:31:25,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:31:25,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:31:25,636 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:31:25,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:31:25,637 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:31:25,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:31:25,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:31:25,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:31:25,638 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:31:25,638 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:31:25,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:31:25,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:31:25,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:31:25,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:31:25,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:31:25,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:31:25,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:31:25,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:31:25,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:31:25,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:31:25,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:31:25,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33d006375056e7e3c58d58b776bed0fedce081ec4ff9e691f038a741177fe7dd [2022-11-16 11:31:25,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:31:26,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:31:26,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:31:26,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:31:26,034 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:31:26,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i [2022-11-16 11:31:26,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/data/d4d9b4e15/f7811d5da3ff45228e15c4abe92d6705/FLAG834a7b045 [2022-11-16 11:31:26,591 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:31:26,592 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex3.i [2022-11-16 11:31:26,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/data/d4d9b4e15/f7811d5da3ff45228e15c4abe92d6705/FLAG834a7b045 [2022-11-16 11:31:26,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/data/d4d9b4e15/f7811d5da3ff45228e15c4abe92d6705 [2022-11-16 11:31:26,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:31:26,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:31:26,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:31:26,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:31:26,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:31:26,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:31:26" (1/1) ... [2022-11-16 11:31:26,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a434fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:26, skipping insertion in model container [2022-11-16 11:31:26,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:31:26" (1/1) ... [2022-11-16 11:31:26,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:31:26,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:31:27,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:31:27,203 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:31:27,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:31:27,238 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:31:27,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27 WrapperNode [2022-11-16 11:31:27,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:31:27,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:31:27,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:31:27,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:31:27,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,276 INFO L138 Inliner]: procedures = 11, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2022-11-16 11:31:27,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:31:27,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:31:27,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:31:27,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:31:27,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:31:27,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:31:27,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:31:27,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:31:27,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (1/1) ... [2022-11-16 11:31:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:31:27,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:31:27,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:31:27,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:31:27,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:31:27,379 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2022-11-16 11:31:27,379 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2022-11-16 11:31:27,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:31:27,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:31:27,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:31:27,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:31:27,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:31:27,455 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:31:27,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:31:27,652 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:31:27,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:31:27,658 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:31:27,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:27 BoogieIcfgContainer [2022-11-16 11:31:27,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:31:27,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:31:27,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:31:27,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:31:27,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:31:26" (1/3) ... [2022-11-16 11:31:27,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3011cfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:31:27, skipping insertion in model container [2022-11-16 11:31:27,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:31:27" (2/3) ... [2022-11-16 11:31:27,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3011cfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:31:27, skipping insertion in model container [2022-11-16 11:31:27,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:27" (3/3) ... [2022-11-16 11:31:27,687 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_malloc_ex3.i [2022-11-16 11:31:27,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:31:27,716 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-16 11:31:27,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:31:27,809 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6a62fa85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:31:27,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-16 11:31:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:31:27,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:27,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:31:27,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:27,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1818789, now seen corresponding path program 1 times [2022-11-16 11:31:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:27,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783860402] [2022-11-16 11:31:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:27,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:28,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783860402] [2022-11-16 11:31:28,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783860402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:28,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:28,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:28,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474039106] [2022-11-16 11:31:28,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:28,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:31:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:31:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:31:28,096 INFO L87 Difference]: Start difference. First operand has 40 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 36 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:28,119 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-11-16 11:31:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:31:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-16 11:31:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:28,154 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:31:28,154 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 11:31:28,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:31:28,160 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:28,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 11:31:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 11:31:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-11-16 11:31:28,225 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2022-11-16 11:31:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:28,225 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-11-16 11:31:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-11-16 11:31:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:31:28,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:28,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:31:28,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:31:28,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1818479, now seen corresponding path program 1 times [2022-11-16 11:31:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609688164] [2022-11-16 11:31:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:28,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:28,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609688164] [2022-11-16 11:31:28,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609688164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:28,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:28,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:28,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801142825] [2022-11-16 11:31:28,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:28,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:31:28,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:31:28,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:28,314 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:28,364 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-11-16 11:31:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-16 11:31:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:28,366 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:31:28,366 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 11:31:28,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:28,368 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:28,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 11:31:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-16 11:31:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 35 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-11-16 11:31:28,375 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 4 [2022-11-16 11:31:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:28,376 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-11-16 11:31:28,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-11-16 11:31:28,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:31:28,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:28,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:31:28,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:31:28,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:28,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1818533, now seen corresponding path program 1 times [2022-11-16 11:31:28,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:28,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300252126] [2022-11-16 11:31:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:28,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300252126] [2022-11-16 11:31:28,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300252126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:28,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:28,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:28,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475926952] [2022-11-16 11:31:28,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:28,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:31:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:28,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:31:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:28,449 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:28,503 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2022-11-16 11:31:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-16 11:31:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:28,505 INFO L225 Difference]: With dead ends: 38 [2022-11-16 11:31:28,507 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 11:31:28,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:28,509 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:28,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 57 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 11:31:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 11:31:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-11-16 11:31:28,522 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2022-11-16 11:31:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:28,523 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-11-16 11:31:28,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-11-16 11:31:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:31:28,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:28,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:31:28,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:31:28,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1818534, now seen corresponding path program 1 times [2022-11-16 11:31:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:28,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775033255] [2022-11-16 11:31:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:28,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:28,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775033255] [2022-11-16 11:31:28,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775033255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:28,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:28,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:31:28,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869721617] [2022-11-16 11:31:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:28,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:31:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:31:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:28,667 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:28,692 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-11-16 11:31:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:31:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-16 11:31:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:28,693 INFO L225 Difference]: With dead ends: 37 [2022-11-16 11:31:28,693 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 11:31:28,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:31:28,695 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:28,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 58 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 11:31:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-16 11:31:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-16 11:31:28,703 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 4 [2022-11-16 11:31:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:28,704 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-16 11:31:28,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-16 11:31:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:31:28,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:28,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:31:28,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 121642097, now seen corresponding path program 1 times [2022-11-16 11:31:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:28,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746989431] [2022-11-16 11:31:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746989431] [2022-11-16 11:31:28,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746989431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:28,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:28,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:28,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649828695] [2022-11-16 11:31:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:28,834 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:28,912 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-16 11:31:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:31:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:28,913 INFO L225 Difference]: With dead ends: 32 [2022-11-16 11:31:28,913 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 11:31:28,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:28,915 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:28,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 11:31:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 11:31:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-11-16 11:31:28,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 8 [2022-11-16 11:31:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:28,920 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-11-16 11:31:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-11-16 11:31:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:31:28,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:28,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:28,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:31:28,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:28,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash 121642098, now seen corresponding path program 1 times [2022-11-16 11:31:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:28,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029439661] [2022-11-16 11:31:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:28,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029439661] [2022-11-16 11:31:29,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029439661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:29,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:29,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:29,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498155710] [2022-11-16 11:31:29,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:29,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:29,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:29,063 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:29,125 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-11-16 11:31:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:29,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 11:31:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:29,126 INFO L225 Difference]: With dead ends: 27 [2022-11-16 11:31:29,126 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 11:31:29,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:29,128 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:29,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:31:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 11:31:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-16 11:31:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:29,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-16 11:31:29,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 8 [2022-11-16 11:31:29,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:29,133 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-16 11:31:29,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,133 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-16 11:31:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:31:29,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:29,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:29,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:31:29,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting recErr5ASSERT_VIOLATIONMEMORY_FREE === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:29,135 INFO L85 PathProgramCache]: Analyzing trace with hash 132647994, now seen corresponding path program 1 times [2022-11-16 11:31:29,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:29,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973673192] [2022-11-16 11:31:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:31:29,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973673192] [2022-11-16 11:31:29,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973673192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:29,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:29,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:31:29,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855364329] [2022-11-16 11:31:29,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:29,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:31:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:29,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:31:29,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:31:29,252 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:29,320 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-16 11:31:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:31:29,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:31:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:29,327 INFO L225 Difference]: With dead ends: 26 [2022-11-16 11:31:29,327 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 11:31:29,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:31:29,329 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:29,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 11:31:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-16 11:31:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 11:31:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-16 11:31:29,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 13 [2022-11-16 11:31:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:29,333 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-16 11:31:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-16 11:31:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:31:29,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:31:29,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:31:29,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-16 11:31:29,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:31:29,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1833896375, now seen corresponding path program 1 times [2022-11-16 11:31:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:31:29,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106354406] [2022-11-16 11:31:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:31:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:31:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:29,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 11:31:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:31:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:31:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:31:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106354406] [2022-11-16 11:31:29,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106354406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:31:29,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:31:29,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:31:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949024816] [2022-11-16 11:31:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:31:29,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:31:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:31:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:31:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:31:29,587 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:31:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:31:29,678 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-11-16 11:31:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:31:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-16 11:31:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:31:29,679 INFO L225 Difference]: With dead ends: 25 [2022-11-16 11:31:29,679 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:31:29,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:31:29,682 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:31:29,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:31:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:31:29,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:31:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:31:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:31:29,685 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2022-11-16 11:31:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:31:29,690 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:31:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 11:31:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:31:29,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:31:29,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2022-11-16 11:31:29,696 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2022-11-16 11:31:29,697 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-16 11:31:29,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-16 11:31:29,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr4ASSERT_VIOLATIONMEMORY_FREE (9 of 14 remaining) [2022-11-16 11:31:29,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr5ASSERT_VIOLATIONMEMORY_FREE (8 of 14 remaining) [2022-11-16 11:31:29,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr6ASSERT_VIOLATIONMEMORY_FREE (7 of 14 remaining) [2022-11-16 11:31:29,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-16 11:31:29,705 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-16 11:31:29,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-16 11:31:29,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2022-11-16 11:31:29,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2022-11-16 11:31:29,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2022-11-16 11:31:29,706 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-16 11:31:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:31:29,710 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:31:29,713 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:31:29,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:31:29 BoogieIcfgContainer [2022-11-16 11:31:29,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:31:29,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:31:29,723 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:31:29,723 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:31:29,723 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:31:27" (3/4) ... [2022-11-16 11:31:29,726 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 11:31:29,732 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec [2022-11-16 11:31:29,737 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-16 11:31:29,737 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-16 11:31:29,737 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-16 11:31:29,738 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 11:31:29,778 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:31:29,778 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:31:29,779 INFO L158 Benchmark]: Toolchain (without parser) took 2810.70ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 49.0MB in the beginning and 57.2MB in the end (delta: -8.2MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2022-11-16 11:31:29,780 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 86.0MB. Free memory was 65.1MB in the beginning and 65.1MB in the end (delta: 48.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:31:29,780 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.04ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 48.8MB in the beginning and 84.1MB in the end (delta: -35.3MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2022-11-16 11:31:29,780 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.60ms. Allocated memory is still 107.0MB. Free memory was 84.1MB in the beginning and 82.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:29,781 INFO L158 Benchmark]: Boogie Preprocessor took 20.79ms. Allocated memory is still 107.0MB. Free memory was 82.5MB in the beginning and 81.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:31:29,781 INFO L158 Benchmark]: RCFGBuilder took 359.64ms. Allocated memory is still 107.0MB. Free memory was 81.4MB in the beginning and 69.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-16 11:31:29,782 INFO L158 Benchmark]: TraceAbstraction took 2043.18ms. Allocated memory is still 107.0MB. Free memory was 69.0MB in the beginning and 59.9MB in the end (delta: 9.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2022-11-16 11:31:29,782 INFO L158 Benchmark]: Witness Printer took 55.93ms. Allocated memory is still 107.0MB. Free memory was 59.9MB in the beginning and 57.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:31:29,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 86.0MB. Free memory was 65.1MB in the beginning and 65.1MB in the end (delta: 48.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 268.04ms. Allocated memory was 86.0MB in the beginning and 107.0MB in the end (delta: 21.0MB). Free memory was 48.8MB in the beginning and 84.1MB in the end (delta: -35.3MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.60ms. Allocated memory is still 107.0MB. Free memory was 84.1MB in the beginning and 82.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.79ms. Allocated memory is still 107.0MB. Free memory was 82.5MB in the beginning and 81.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 359.64ms. Allocated memory is still 107.0MB. Free memory was 81.4MB in the beginning and 69.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2043.18ms. Allocated memory is still 107.0MB. Free memory was 69.0MB in the beginning and 59.9MB in the end (delta: 9.1MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. * Witness Printer took 55.93ms. Allocated memory is still 107.0MB. Free memory was 59.9MB in the beginning and 57.2MB in the end (delta: 2.7MB). 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: 11]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 11]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 11]: free always succeeds For all program executions holds that free 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: 18]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 40 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 125 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 122 mSDsluCounter, 390 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 166 mSDsCounter, 19 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 231 IncrementalHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19 mSolverCounterUnsat, 224 mSDtfsCounter, 231 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 249 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 1/1 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 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-16 11:31:29,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34ec3adb-be96-46d7-9f50-de8716338862/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE