./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-sorted-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/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_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-sorted-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/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_35e352e9-a179-4ad4-adda-e2a995a748c5/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 618946a6e113450d0f3efa55a455801e1c2225c3ba6f88e87a9e8ad02019b85f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:30:30,630 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:30:30,712 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:30:30,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:30:30,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:30:30,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:30:30,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:30:30,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:30:30,749 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:30:30,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:30:30,750 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:30:30,751 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:30:30,752 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:30:30,752 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:30:30,753 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:30:30,754 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:30:30,754 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:30:30,755 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:30:30,756 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:30:30,756 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:30:30,757 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:30:30,758 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:30:30,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:30:30,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:30:30,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:30:30,761 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:30:30,761 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:30:30,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:30:30,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:30:30,763 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:30:30,763 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:30:30,764 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:30:30,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:30:30,765 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:30:30,765 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:30:30,766 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:30:30,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:30:30,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:30:30,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:30:30,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:30:30,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:30:30,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:30:30,770 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:30:30,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:30:30,771 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:30:30,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:30:30,772 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_35e352e9-a179-4ad4-adda-e2a995a748c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 618946a6e113450d0f3efa55a455801e1c2225c3ba6f88e87a9e8ad02019b85f [2023-11-06 20:30:31,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:30:31,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:30:31,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:30:31,054 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:30:31,056 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:30:31,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/forester-heap/sll-sorted-2.i [2023-11-06 20:30:34,334 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:30:34,655 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:30:34,655 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/sv-benchmarks/c/forester-heap/sll-sorted-2.i [2023-11-06 20:30:34,669 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/data/afb37102c/04f70870ca5b40f392511d13e1592c11/FLAGfa7d0925c [2023-11-06 20:30:34,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/data/afb37102c/04f70870ca5b40f392511d13e1592c11 [2023-11-06 20:30:34,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:30:34,688 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:30:34,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:30:34,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:30:34,698 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:30:34,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4ea932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:34, skipping insertion in model container [2023-11-06 20:30:34,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:30:34" (1/1) ... [2023-11-06 20:30:34,753 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:30:35,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:30:35,089 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:30:35,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:30:35,170 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:30:35,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35 WrapperNode [2023-11-06 20:30:35,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:30:35,172 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:30:35,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:30:35,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:30:35,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,195 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,225 INFO L138 Inliner]: procedures = 119, calls = 47, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 201 [2023-11-06 20:30:35,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:30:35,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:30:35,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:30:35,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:30:35,237 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,242 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,259 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,261 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:30:35,268 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:30:35,269 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:30:35,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:30:35,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (1/1) ... [2023-11-06 20:30:35,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:30:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:35,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:30:35,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:30:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-06 20:30:35,374 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-06 20:30:35,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:30:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:30:35,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:30:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:30:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:30:35,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:30:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:30:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:30:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:30:35,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:30:35,534 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:30:35,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:30:36,121 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:30:36,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:30:36,242 INFO L302 CfgBuilder]: Removed 20 assume(true) statements. [2023-11-06 20:30:36,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:30:36 BoogieIcfgContainer [2023-11-06 20:30:36,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:30:36,250 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:30:36,250 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:30:36,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:30:36,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:30:34" (1/3) ... [2023-11-06 20:30:36,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c02bcb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:30:36, skipping insertion in model container [2023-11-06 20:30:36,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:30:35" (2/3) ... [2023-11-06 20:30:36,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c02bcb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:30:36, skipping insertion in model container [2023-11-06 20:30:36,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:30:36" (3/3) ... [2023-11-06 20:30:36,260 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-sorted-2.i [2023-11-06 20:30:36,278 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:30:36,278 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2023-11-06 20:30:36,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:30:36,333 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;@791475d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:30:36,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-11-06 20:30:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 75 states have (on average 2.3466666666666667) internal successors, (176), 140 states have internal predecessors, (176), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 20:30:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:30:36,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:36,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:30:36,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:36,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash 12940, now seen corresponding path program 1 times [2023-11-06 20:30:36,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007009417] [2023-11-06 20:30:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:36,535 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 20:30:36,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:36,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007009417] [2023-11-06 20:30:36,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007009417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:36,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:36,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:30:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954612636] [2023-11-06 20:30:36,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:36,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:36,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:36,581 INFO L87 Difference]: Start difference. First operand has 149 states, 75 states have (on average 2.3466666666666667) internal successors, (176), 140 states have internal predecessors, (176), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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 20:30:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:36,846 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2023-11-06 20:30:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:36,848 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 20:30:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:36,864 INFO L225 Difference]: With dead ends: 141 [2023-11-06 20:30:36,865 INFO L226 Difference]: Without dead ends: 140 [2023-11-06 20:30:36,867 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 20:30:36,872 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 130 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:36,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 90 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-06 20:30:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2023-11-06 20:30:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1641791044776117) internal successors, (145), 135 states have internal predecessors, (145), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2023-11-06 20:30:36,931 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 2 [2023-11-06 20:30:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:36,931 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2023-11-06 20:30:36,932 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 20:30:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2023-11-06 20:30:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:30:36,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:36,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:30:36,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:30:36,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:36,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash 12941, now seen corresponding path program 1 times [2023-11-06 20:30:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857622573] [2023-11-06 20:30:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:36,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:37,091 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 20:30:37,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857622573] [2023-11-06 20:30:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857622573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:37,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:37,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:30:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625615424] [2023-11-06 20:30:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:37,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:37,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:37,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:37,098 INFO L87 Difference]: Start difference. First operand 137 states and 152 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 20:30:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:37,233 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2023-11-06 20:30:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:37,234 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 20:30:37,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:37,246 INFO L225 Difference]: With dead ends: 138 [2023-11-06 20:30:37,246 INFO L226 Difference]: Without dead ends: 138 [2023-11-06 20:30:37,250 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 20:30:37,253 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 128 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:37,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 90 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:30:37,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-06 20:30:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2023-11-06 20:30:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 67 states have (on average 2.1343283582089554) internal successors, (143), 133 states have internal predecessors, (143), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2023-11-06 20:30:37,274 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 2 [2023-11-06 20:30:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:37,274 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2023-11-06 20:30:37,274 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 20:30:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2023-11-06 20:30:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:30:37,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:37,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:30:37,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:30:37,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:37,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash -924120088, now seen corresponding path program 1 times [2023-11-06 20:30:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366610403] [2023-11-06 20:30:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:37,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:37,561 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 20:30:37,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366610403] [2023-11-06 20:30:37,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366610403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:37,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:37,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069099369] [2023-11-06 20:30:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:37,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:30:37,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:30:37,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:30:37,566 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:37,810 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2023-11-06 20:30:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:30:37,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 20:30:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:37,812 INFO L225 Difference]: With dead ends: 140 [2023-11-06 20:30:37,812 INFO L226 Difference]: Without dead ends: 140 [2023-11-06 20:30:37,813 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 20:30:37,814 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 223 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:37,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 68 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:37,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-06 20:30:37,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2023-11-06 20:30:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.875) internal successors, (150), 129 states have internal predecessors, (150), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2023-11-06 20:30:37,827 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 6 [2023-11-06 20:30:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:37,827 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2023-11-06 20:30:37,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2023-11-06 20:30:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:30:37,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:37,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 20:30:37,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:30:37,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:37,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:37,829 INFO L85 PathProgramCache]: Analyzing trace with hash -924120087, now seen corresponding path program 1 times [2023-11-06 20:30:37,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:37,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519330425] [2023-11-06 20:30:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:37,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:38,097 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 20:30:38,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:38,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519330425] [2023-11-06 20:30:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519330425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:38,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:38,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:30:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630421935] [2023-11-06 20:30:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:38,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:30:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:30:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:30:38,101 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:38,428 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2023-11-06 20:30:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:30:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 20:30:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:38,431 INFO L225 Difference]: With dead ends: 188 [2023-11-06 20:30:38,431 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 20:30:38,431 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 20:30:38,443 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 238 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:38,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 115 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:30:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 20:30:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2023-11-06 20:30:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 120 states have (on average 1.725) internal successors, (207), 169 states have internal predecessors, (207), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 214 transitions. [2023-11-06 20:30:38,469 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 214 transitions. Word has length 6 [2023-11-06 20:30:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:38,470 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 214 transitions. [2023-11-06 20:30:38,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 214 transitions. [2023-11-06 20:30:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:30:38,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:38,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:30:38,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:38,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:38,474 INFO L85 PathProgramCache]: Analyzing trace with hash 979177158, now seen corresponding path program 1 times [2023-11-06 20:30:38,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:38,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980286560] [2023-11-06 20:30:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:38,592 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 20:30:38,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:38,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980286560] [2023-11-06 20:30:38,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980286560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:38,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:38,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:30:38,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014266147] [2023-11-06 20:30:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:30:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:30:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:30:38,595 INFO L87 Difference]: Start difference. First operand 171 states and 214 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 20:30:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:38,892 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2023-11-06 20:30:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:30:38,892 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2023-11-06 20:30:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:38,894 INFO L225 Difference]: With dead ends: 176 [2023-11-06 20:30:38,895 INFO L226 Difference]: Without dead ends: 176 [2023-11-06 20:30:38,895 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 20:30:38,896 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 80 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:38,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 203 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:30:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-06 20:30:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2023-11-06 20:30:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 168 states have internal predecessors, (206), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 213 transitions. [2023-11-06 20:30:38,920 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 213 transitions. Word has length 8 [2023-11-06 20:30:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:38,921 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 213 transitions. [2023-11-06 20:30:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 20:30:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 213 transitions. [2023-11-06 20:30:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:30:38,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:38,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:38,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:30:38,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:38,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 979177159, now seen corresponding path program 1 times [2023-11-06 20:30:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:38,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66255802] [2023-11-06 20:30:38,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:38,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:39,177 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 20:30:39,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66255802] [2023-11-06 20:30:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66255802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:39,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:39,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:30:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970947608] [2023-11-06 20:30:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:39,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:30:39,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:30:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:30:39,183 INFO L87 Difference]: Start difference. First operand 170 states and 213 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 20:30:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:39,470 INFO L93 Difference]: Finished difference Result 166 states and 209 transitions. [2023-11-06 20:30:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:30:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2023-11-06 20:30:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:39,473 INFO L225 Difference]: With dead ends: 166 [2023-11-06 20:30:39,474 INFO L226 Difference]: Without dead ends: 166 [2023-11-06 20:30:39,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:30:39,475 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 8 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:39,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 293 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:39,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-06 20:30:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2023-11-06 20:30:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 159 states have internal predecessors, (196), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 203 transitions. [2023-11-06 20:30:39,491 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 203 transitions. Word has length 8 [2023-11-06 20:30:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:39,491 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 203 transitions. [2023-11-06 20:30:39,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 20:30:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 203 transitions. [2023-11-06 20:30:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:30:39,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:39,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:39,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:30:39,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:39,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:39,493 INFO L85 PathProgramCache]: Analyzing trace with hash 28335733, now seen corresponding path program 1 times [2023-11-06 20:30:39,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:39,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154864078] [2023-11-06 20:30:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:39,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:39,528 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 20:30:39,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:39,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154864078] [2023-11-06 20:30:39,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154864078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:39,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:39,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:30:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286243630] [2023-11-06 20:30:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:39,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:30:39,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:30:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:30:39,531 INFO L87 Difference]: Start difference. First operand 161 states and 203 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:39,594 INFO L93 Difference]: Finished difference Result 187 states and 233 transitions. [2023-11-06 20:30:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:30:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:30:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:39,597 INFO L225 Difference]: With dead ends: 187 [2023-11-06 20:30:39,597 INFO L226 Difference]: Without dead ends: 187 [2023-11-06 20:30:39,597 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 20:30:39,598 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 84 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:39,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:30:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-06 20:30:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 163. [2023-11-06 20:30:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 118 states have (on average 1.6779661016949152) internal successors, (198), 161 states have internal predecessors, (198), 7 states have call successors, (7), 1 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 205 transitions. [2023-11-06 20:30:39,606 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 205 transitions. Word has length 10 [2023-11-06 20:30:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:39,606 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 205 transitions. [2023-11-06 20:30:39,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 205 transitions. [2023-11-06 20:30:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:30:39,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:39,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:39,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:30:39,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:39,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:39,608 INFO L85 PathProgramCache]: Analyzing trace with hash 320005524, now seen corresponding path program 1 times [2023-11-06 20:30:39,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523348033] [2023-11-06 20:30:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:30:39,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:39,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523348033] [2023-11-06 20:30:39,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523348033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:30:39,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:30:39,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:30:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951997549] [2023-11-06 20:30:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:30:39,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:30:39,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:30:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:30:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:30:39,680 INFO L87 Difference]: Start difference. First operand 163 states and 205 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 20:30:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:30:39,862 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2023-11-06 20:30:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:30:39,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 17 [2023-11-06 20:30:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:30:39,864 INFO L225 Difference]: With dead ends: 185 [2023-11-06 20:30:39,864 INFO L226 Difference]: Without dead ends: 185 [2023-11-06 20:30:39,865 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 20:30:39,865 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 224 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:30:39,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 159 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:30:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-06 20:30:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 162. [2023-11-06 20:30:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 118 states have (on average 1.652542372881356) internal successors, (195), 160 states have internal predecessors, (195), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:30:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 201 transitions. [2023-11-06 20:30:39,872 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 201 transitions. Word has length 17 [2023-11-06 20:30:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:30:39,872 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 201 transitions. [2023-11-06 20:30:39,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 20:30:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2023-11-06 20:30:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:30:39,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:30:39,874 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:30:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:30:39,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:30:39,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:30:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1917780317, now seen corresponding path program 1 times [2023-11-06 20:30:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:30:39,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233285357] [2023-11-06 20:30:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:30:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:40,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:30:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233285357] [2023-11-06 20:30:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233285357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:30:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078783974] [2023-11-06 20:30:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:30:40,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:30:40,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:30:40,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:30:40,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:30:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:30:40,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 20:30:40,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:30:40,768 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 20:30:40,981 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 20:30:40,981 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 17 treesize of output 21 [2023-11-06 20:30:41,076 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 20:30:41,186 INFO L322 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-06 20:30:41,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-06 20:30:41,243 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:30:41,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-06 20:30:41,457 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 20:30:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:41,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:30:45,879 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:30:45,892 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 20 treesize of output 21 [2023-11-06 20:30:45,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:30:45,915 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 34 treesize of output 37 [2023-11-06 20:30:45,931 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 11 treesize of output 9 [2023-11-06 20:30:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:30:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078783974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:30:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545872804] [2023-11-06 20:30:47,023 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-06 20:30:47,023 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:30:47,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:30:47,035 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:30:47,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:30:53,643 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:03,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2889#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_#t~mem7#1.base|) 1)) (or (not (= |ULTIMATE.start_main_#t~mem6#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem6#1.offset| 0))) (= |ULTIMATE.start_main_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) 0)) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) (= |ULTIMATE.start_main_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) 0)) (<= 4 (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) |ULTIMATE.start_main_#t~short9#1| (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) 0)) (= |ULTIMATE.start_main_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) 0)) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)))' at error location [2023-11-06 20:31:03,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:03,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:03,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-06 20:31:03,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635084032] [2023-11-06 20:31:03,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:03,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 20:31:03,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 20:31:03,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1594, Unknown=10, NotChecked=0, Total=1806 [2023-11-06 20:31:03,682 INFO L87 Difference]: Start difference. First operand 162 states and 201 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 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 20:31:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:06,131 INFO L93 Difference]: Finished difference Result 333 states and 396 transitions. [2023-11-06 20:31:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 20:31:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 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 20:31:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:06,136 INFO L225 Difference]: With dead ends: 333 [2023-11-06 20:31:06,136 INFO L226 Difference]: Without dead ends: 333 [2023-11-06 20:31:06,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=362, Invalid=2490, Unknown=10, NotChecked=0, Total=2862 [2023-11-06 20:31:06,139 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1148 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:06,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 836 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 20:31:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-06 20:31:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 189. [2023-11-06 20:31:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 145 states have (on average 1.5862068965517242) internal successors, (230), 187 states have internal predecessors, (230), 6 states have call successors, (6), 1 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 236 transitions. [2023-11-06 20:31:06,149 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 236 transitions. Word has length 20 [2023-11-06 20:31:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:06,150 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 236 transitions. [2023-11-06 20:31:06,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 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 20:31:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 236 transitions. [2023-11-06 20:31:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:31:06,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:06,152 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:06,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e352e9-a179-4ad4-adda-e2a995a748c5/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0