./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-buckets-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-buckets-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6b726a83620fff2a21a6dbfdec50e244c1786dd86dd76b1719515a59b3627ac --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:56:26,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:56:26,323 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:56:26,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:56:26,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:56:26,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:56:26,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:56:26,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:56:26,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:56:26,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:56:26,391 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:56:26,391 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:56:26,392 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:56:26,392 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:56:26,393 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:56:26,393 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:56:26,394 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:56:26,394 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:56:26,395 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:56:26,395 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:56:26,396 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:56:26,396 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:56:26,397 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:56:26,398 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:56:26,398 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:56:26,399 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:56:26,399 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:56:26,400 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:56:26,400 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:56:26,401 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:56:26,420 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:56:26,420 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:56:26,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:56:26,420 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:56:26,421 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:56:26,421 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:56:26,421 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:56:26,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:56:26,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:56:26,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:26,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:56:26,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:56:26,423 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:56:26,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:56:26,424 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:56:26,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:56:26,425 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6b726a83620fff2a21a6dbfdec50e244c1786dd86dd76b1719515a59b3627ac [2023-11-06 20:56:26,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:56:26,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:56:26,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:56:26,757 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:56:26,757 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:56:26,759 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/forester-heap/sll-buckets-1.i [2023-11-06 20:56:29,904 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:56:30,293 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:56:30,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/sv-benchmarks/c/forester-heap/sll-buckets-1.i [2023-11-06 20:56:30,315 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/data/3e2f2a423/258a392e23164dff81331cad6c061ef0/FLAG4bd4c1ebc [2023-11-06 20:56:30,336 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/data/3e2f2a423/258a392e23164dff81331cad6c061ef0 [2023-11-06 20:56:30,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:56:30,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:56:30,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:30,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:56:30,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:56:30,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec17916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30, skipping insertion in model container [2023-11-06 20:56:30,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,456 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:56:30,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:30,818 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:56:30,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:30,908 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:56:30,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30 WrapperNode [2023-11-06 20:56:30,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:30,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:56:30,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:56:30,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:56:30,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,976 INFO L138 Inliner]: procedures = 119, calls = 47, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 163 [2023-11-06 20:56:30,977 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:56:30,977 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:56:30,978 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:56:30,980 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:56:30,990 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:30,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:31,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:31,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:31,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:31,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:31,019 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:56:31,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:56:31,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:56:31,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:56:31,022 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (1/1) ... [2023-11-06 20:56:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:31,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:31,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:56:31,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:56:31,178 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-06 20:56:31,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-06 20:56:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:56:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:56:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:56:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:56:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:56:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:56:31,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:56:31,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:56:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:56:31,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:56:31,329 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:56:31,331 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:56:31,848 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:56:31,950 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:56:31,950 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-11-06 20:56:31,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:56:31 BoogieIcfgContainer [2023-11-06 20:56:31,954 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:56:31,958 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:56:31,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:56:31,961 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:56:31,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:56:30" (1/3) ... [2023-11-06 20:56:31,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eaaa16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:56:31, skipping insertion in model container [2023-11-06 20:56:31,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:30" (2/3) ... [2023-11-06 20:56:31,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eaaa16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:56:31, skipping insertion in model container [2023-11-06 20:56:31,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:56:31" (3/3) ... [2023-11-06 20:56:31,968 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-buckets-1.i [2023-11-06 20:56:31,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:56:31,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-11-06 20:56:32,048 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:56:32,056 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;@717af4ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:56:32,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2023-11-06 20:56:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 136 states have internal predecessors, (163), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 20:56:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:56:32,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:32,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:56:32,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:32,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 10801, now seen corresponding path program 1 times [2023-11-06 20:56:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:32,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049865053] [2023-11-06 20:56:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:32,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:32,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:32,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049865053] [2023-11-06 20:56:32,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049865053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:32,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:32,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:56:32,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452634936] [2023-11-06 20:56:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:32,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:32,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:32,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:32,415 INFO L87 Difference]: Start difference. First operand has 143 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 136 states have internal predecessors, (163), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:56:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:32,735 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2023-11-06 20:56:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:32,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:56:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:32,748 INFO L225 Difference]: With dead ends: 164 [2023-11-06 20:56:32,749 INFO L226 Difference]: Without dead ends: 163 [2023-11-06 20:56:32,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:32,755 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:32,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 96 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:56:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-06 20:56:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 131. [2023-11-06 20:56:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 62 states have (on average 2.2096774193548385) internal successors, (137), 129 states have internal predecessors, (137), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2023-11-06 20:56:32,805 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 2 [2023-11-06 20:56:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:32,805 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2023-11-06 20:56:32,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:56:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2023-11-06 20:56:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:56:32,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:32,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:56:32,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:56:32,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:32,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:32,808 INFO L85 PathProgramCache]: Analyzing trace with hash 10802, now seen corresponding path program 1 times [2023-11-06 20:56:32,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:32,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997746002] [2023-11-06 20:56:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:32,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:32,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:32,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997746002] [2023-11-06 20:56:32,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997746002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:32,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:32,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:56:32,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684668792] [2023-11-06 20:56:32,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:32,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:32,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:32,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:32,968 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:56:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:33,164 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2023-11-06 20:56:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 20:56:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:33,167 INFO L225 Difference]: With dead ends: 162 [2023-11-06 20:56:33,167 INFO L226 Difference]: Without dead ends: 162 [2023-11-06 20:56:33,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:33,170 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 58 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:33,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 160 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-06 20:56:33,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 127. [2023-11-06 20:56:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 125 states have internal predecessors, (133), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2023-11-06 20:56:33,185 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 2 [2023-11-06 20:56:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:33,185 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2023-11-06 20:56:33,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-06 20:56:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2023-11-06 20:56:33,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:56:33,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:33,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:56:33,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:56:33,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:33,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1393943478, now seen corresponding path program 1 times [2023-11-06 20:56:33,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:33,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069597204] [2023-11-06 20:56:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:33,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:33,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:33,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069597204] [2023-11-06 20:56:33,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069597204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:33,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:33,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:56:33,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380258785] [2023-11-06 20:56:33,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:33,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:56:33,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:56:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:33,514 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:33,862 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2023-11-06 20:56:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:56:33,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 20:56:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:33,871 INFO L225 Difference]: With dead ends: 131 [2023-11-06 20:56:33,872 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 20:56:33,873 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 [2023-11-06 20:56:33,880 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 83 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:33,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 188 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:56:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 20:56:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2023-11-06 20:56:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 122 states have internal predecessors, (138), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2023-11-06 20:56:33,903 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 6 [2023-11-06 20:56:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:33,904 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2023-11-06 20:56:33,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2023-11-06 20:56:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:56:33,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:33,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:56:33,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:56:33,907 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:33,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1393943479, now seen corresponding path program 1 times [2023-11-06 20:56:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:33,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308466385] [2023-11-06 20:56:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:34,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308466385] [2023-11-06 20:56:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308466385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:34,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:34,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:56:34,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772649284] [2023-11-06 20:56:34,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:34,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:56:34,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:34,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:56:34,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:34,217 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:34,470 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2023-11-06 20:56:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:56:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 20:56:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:34,473 INFO L225 Difference]: With dead ends: 120 [2023-11-06 20:56:34,473 INFO L226 Difference]: Without dead ends: 120 [2023-11-06 20:56:34,474 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 [2023-11-06 20:56:34,479 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 3 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:34,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 284 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-06 20:56:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-11-06 20:56:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 118 states have internal predecessors, (134), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2023-11-06 20:56:34,488 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 6 [2023-11-06 20:56:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:34,488 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2023-11-06 20:56:34,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2023-11-06 20:56:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:56:34,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:34,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:34,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:56:34,490 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:34,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1241161025, now seen corresponding path program 1 times [2023-11-06 20:56:34,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:34,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070903719] [2023-11-06 20:56:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:34,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:34,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:34,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070903719] [2023-11-06 20:56:34,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070903719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:34,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:34,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:56:34,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970047878] [2023-11-06 20:56:34,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:34,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:56:34,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:56:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:34,716 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:34,960 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2023-11-06 20:56:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:56:34,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:56:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:34,962 INFO L225 Difference]: With dead ends: 126 [2023-11-06 20:56:34,962 INFO L226 Difference]: Without dead ends: 126 [2023-11-06 20:56:34,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:56:34,963 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 78 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:34,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 183 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-06 20:56:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2023-11-06 20:56:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 70 states have (on average 1.9) internal successors, (133), 117 states have internal predecessors, (133), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2023-11-06 20:56:34,986 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 10 [2023-11-06 20:56:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:34,987 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2023-11-06 20:56:34,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2023-11-06 20:56:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:56:34,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:34,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:56:34,988 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:34,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1241161026, now seen corresponding path program 1 times [2023-11-06 20:56:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:34,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857503675] [2023-11-06 20:56:34,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:34,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:35,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:35,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857503675] [2023-11-06 20:56:35,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857503675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:35,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:35,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:56:35,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194845872] [2023-11-06 20:56:35,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:56:35,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:56:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:35,270 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:35,475 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2023-11-06 20:56:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:56:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:56:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:35,476 INFO L225 Difference]: With dead ends: 119 [2023-11-06 20:56:35,476 INFO L226 Difference]: Without dead ends: 119 [2023-11-06 20:56:35,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:35,478 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 5 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:35,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 273 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-06 20:56:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-11-06 20:56:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.8571428571428572) internal successors, (130), 114 states have internal predecessors, (130), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2023-11-06 20:56:35,494 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 10 [2023-11-06 20:56:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:35,495 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2023-11-06 20:56:35,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2023-11-06 20:56:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:56:35,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:35,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:35,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:56:35,496 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:35,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash 996255913, now seen corresponding path program 1 times [2023-11-06 20:56:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:35,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839881015] [2023-11-06 20:56:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:35,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:35,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839881015] [2023-11-06 20:56:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839881015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:35,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:35,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:35,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551961253] [2023-11-06 20:56:35,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:35,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:35,622 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:35,728 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2023-11-06 20:56:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 20:56:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:35,731 INFO L225 Difference]: With dead ends: 120 [2023-11-06 20:56:35,732 INFO L226 Difference]: Without dead ends: 120 [2023-11-06 20:56:35,732 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 [2023-11-06 20:56:35,735 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 58 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:35,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 109 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-06 20:56:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 111. [2023-11-06 20:56:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 109 states have internal predecessors, (125), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2023-11-06 20:56:35,749 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 15 [2023-11-06 20:56:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:35,749 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2023-11-06 20:56:35,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2023-11-06 20:56:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:56:35,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:35,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:56:35,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:35,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash 996255912, now seen corresponding path program 1 times [2023-11-06 20:56:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142612385] [2023-11-06 20:56:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:35,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:35,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142612385] [2023-11-06 20:56:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142612385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:35,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817835471] [2023-11-06 20:56:35,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:35,855 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:35,955 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2023-11-06 20:56:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:35,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 20:56:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:35,956 INFO L225 Difference]: With dead ends: 115 [2023-11-06 20:56:35,957 INFO L226 Difference]: Without dead ends: 115 [2023-11-06 20:56:35,957 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 [2023-11-06 20:56:35,959 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:35,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 108 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-06 20:56:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2023-11-06 20:56:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.7142857142857142) internal successors, (120), 104 states have internal predecessors, (120), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2023-11-06 20:56:35,966 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 15 [2023-11-06 20:56:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:35,967 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2023-11-06 20:56:35,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2023-11-06 20:56:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:56:35,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:35,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:35,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:56:35,971 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:35,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:35,971 INFO L85 PathProgramCache]: Analyzing trace with hash -375695818, now seen corresponding path program 1 times [2023-11-06 20:56:35,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:35,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260285218] [2023-11-06 20:56:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:35,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:36,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:36,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260285218] [2023-11-06 20:56:36,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260285218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:36,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:36,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:56:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303334795] [2023-11-06 20:56:36,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:36,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:56:36,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:36,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:56:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:36,183 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-06 20:56:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:36,394 INFO L93 Difference]: Finished difference Result 149 states and 165 transitions. [2023-11-06 20:56:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:56:36,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 20:56:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:36,399 INFO L225 Difference]: With dead ends: 149 [2023-11-06 20:56:36,399 INFO L226 Difference]: Without dead ends: 149 [2023-11-06 20:56:36,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:56:36,402 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 182 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:36,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 118 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-06 20:56:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2023-11-06 20:56:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 76 states have (on average 1.7236842105263157) internal successors, (131), 110 states have internal predecessors, (131), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2023-11-06 20:56:36,408 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 17 [2023-11-06 20:56:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:36,409 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2023-11-06 20:56:36,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-06 20:56:36,409 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2023-11-06 20:56:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:56:36,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:36,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:36,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:56:36,412 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:36,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash -375695817, now seen corresponding path program 1 times [2023-11-06 20:56:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:36,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720122090] [2023-11-06 20:56:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:36,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:36,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720122090] [2023-11-06 20:56:36,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720122090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:36,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:36,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:56:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856567733] [2023-11-06 20:56:36,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:36,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:56:36,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:36,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:56:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:56:36,807 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-06 20:56:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:37,131 INFO L93 Difference]: Finished difference Result 192 states and 225 transitions. [2023-11-06 20:56:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:56:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 20:56:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:37,134 INFO L225 Difference]: With dead ends: 192 [2023-11-06 20:56:37,134 INFO L226 Difference]: Without dead ends: 192 [2023-11-06 20:56:37,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:56:37,135 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 307 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:37,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 141 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:56:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-06 20:56:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2023-11-06 20:56:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 109 states have (on average 1.6788990825688073) internal successors, (183), 143 states have internal predecessors, (183), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 188 transitions. [2023-11-06 20:56:37,144 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 188 transitions. Word has length 17 [2023-11-06 20:56:37,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:37,145 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 188 transitions. [2023-11-06 20:56:37,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-06 20:56:37,145 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 188 transitions. [2023-11-06 20:56:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:56:37,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:37,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:37,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:56:37,147 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:37,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:37,148 INFO L85 PathProgramCache]: Analyzing trace with hash -375692106, now seen corresponding path program 1 times [2023-11-06 20:56:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:37,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990755411] [2023-11-06 20:56:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:37,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990755411] [2023-11-06 20:56:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990755411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:37,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:56:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135855282] [2023-11-06 20:56:37,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:37,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:56:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:56:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:37,270 INFO L87 Difference]: Start difference. First operand 145 states and 188 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-06 20:56:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:37,396 INFO L93 Difference]: Finished difference Result 180 states and 217 transitions. [2023-11-06 20:56:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:56:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 20:56:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:37,399 INFO L225 Difference]: With dead ends: 180 [2023-11-06 20:56:37,399 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 20:56:37,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:37,400 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 165 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:37,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 172 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 20:56:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2023-11-06 20:56:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 109 states have (on average 1.651376146788991) internal successors, (180), 142 states have internal predecessors, (180), 4 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 184 transitions. [2023-11-06 20:56:37,406 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 184 transitions. Word has length 17 [2023-11-06 20:56:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:37,406 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 184 transitions. [2023-11-06 20:56:37,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-06 20:56:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 184 transitions. [2023-11-06 20:56:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:56:37,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:37,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:37,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:56:37,408 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:37,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 333911869, now seen corresponding path program 1 times [2023-11-06 20:56:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:37,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325930177] [2023-11-06 20:56:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:37,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:38,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:38,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325930177] [2023-11-06 20:56:38,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325930177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:38,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:38,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 20:56:38,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079952776] [2023-11-06 20:56:38,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:38,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:56:38,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:38,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:56:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:56:38,285 INFO L87 Difference]: Start difference. First operand 144 states and 184 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:39,105 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2023-11-06 20:56:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 20:56:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-06 20:56:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:39,106 INFO L225 Difference]: With dead ends: 172 [2023-11-06 20:56:39,107 INFO L226 Difference]: Without dead ends: 172 [2023-11-06 20:56:39,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-11-06 20:56:39,108 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 169 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:39,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 402 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 20:56:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-06 20:56:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 150. [2023-11-06 20:56:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.5862068965517242) internal successors, (184), 148 states have internal predecessors, (184), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 187 transitions. [2023-11-06 20:56:39,114 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 187 transitions. Word has length 20 [2023-11-06 20:56:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:39,114 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 187 transitions. [2023-11-06 20:56:39,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 187 transitions. [2023-11-06 20:56:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:56:39,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:39,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 20:56:39,116 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:39,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash -851980361, now seen corresponding path program 1 times [2023-11-06 20:56:39,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:39,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773546408] [2023-11-06 20:56:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:39,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:39,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:39,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773546408] [2023-11-06 20:56:39,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773546408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:39,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:39,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:56:39,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361889876] [2023-11-06 20:56:39,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:39,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:39,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:39,218 INFO L87 Difference]: Start difference. First operand 150 states and 187 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-06 20:56:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:39,270 INFO L93 Difference]: Finished difference Result 149 states and 185 transitions. [2023-11-06 20:56:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:39,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 24 [2023-11-06 20:56:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:39,272 INFO L225 Difference]: With dead ends: 149 [2023-11-06 20:56:39,272 INFO L226 Difference]: Without dead ends: 149 [2023-11-06 20:56:39,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:39,273 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:39,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 126 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-06 20:56:39,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-06 20:56:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 116 states have (on average 1.5775862068965518) internal successors, (183), 147 states have internal predecessors, (183), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 185 transitions. [2023-11-06 20:56:39,279 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 185 transitions. Word has length 24 [2023-11-06 20:56:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:39,279 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 185 transitions. [2023-11-06 20:56:39,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-06 20:56:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 185 transitions. [2023-11-06 20:56:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:56:39,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:39,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 20:56:39,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:39,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1519225938, now seen corresponding path program 1 times [2023-11-06 20:56:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354193292] [2023-11-06 20:56:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:39,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:39,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:39,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354193292] [2023-11-06 20:56:39,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354193292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:39,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:39,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:39,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579179459] [2023-11-06 20:56:39,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:39,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:56:39,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:39,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:56:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:39,388 INFO L87 Difference]: Start difference. First operand 149 states and 185 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:39,519 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2023-11-06 20:56:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:56:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 20:56:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:39,521 INFO L225 Difference]: With dead ends: 181 [2023-11-06 20:56:39,521 INFO L226 Difference]: Without dead ends: 181 [2023-11-06 20:56:39,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:39,522 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 152 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:39,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 171 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-06 20:56:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2023-11-06 20:56:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 118 states have (on average 1.5677966101694916) internal successors, (185), 149 states have internal predecessors, (185), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2023-11-06 20:56:39,528 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 25 [2023-11-06 20:56:39,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:39,528 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2023-11-06 20:56:39,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2023-11-06 20:56:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 20:56:39,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:39,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:39,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 20:56:39,530 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-11-06 20:56:39,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash 278956403, now seen corresponding path program 1 times [2023-11-06 20:56:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111931741] [2023-11-06 20:56:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:39,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:40,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111931741] [2023-11-06 20:56:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111931741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748011438] [2023-11-06 20:56:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:40,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:40,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:40,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:40,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7e06980-6db2-470c-b019-d24b7772d817/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:56:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:40,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 20:56:40,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:40,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:56:40,811 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 20:56:40,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-06 20:56:40,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:56:40,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 20:56:40,934 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 20:56:40,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 20:56:40,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 20:56:41,019 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 20:56:41,251 INFO L322 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2023-11-06 20:56:41,251 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 51 [2023-11-06 20:56:41,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2023-11-06 20:56:41,398 INFO L322 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2023-11-06 20:56:41,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 58 [2023-11-06 20:56:41,498 INFO L322 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2023-11-06 20:56:41,498 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 58 [2023-11-06 20:56:41,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2023-11-06 20:56:41,614 INFO L322 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2023-11-06 20:56:41,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2023-11-06 20:56:41,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-06 20:56:41,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2023-11-06 20:56:42,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-06 20:56:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:42,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:42,817 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:42,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-11-06 20:56:44,888 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:44,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-11-06 20:56:44,896 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 20:56:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 20:56:44,909 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:44,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 50 [2023-11-06 20:56:44,927 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:44,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2023-11-06 20:56:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:46,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748011438] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:46,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334930257] [2023-11-06 20:56:46,419 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-06 20:56:46,419 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:46,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:46,430 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:46,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:49,043 INFO L180 IcfgInterpreter]: Interpretation finished