./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/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_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/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_f0357d68-0bfc-4e44-9025-2b5b444b6238/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 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:35:03,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:35:03,483 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:35:03,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:35:03,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:35:03,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:35:03,529 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:35:03,529 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:35:03,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:35:03,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:35:03,536 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:35:03,537 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:35:03,538 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:35:03,539 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:35:03,540 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:35:03,540 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:35:03,540 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:35:03,541 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:35:03,541 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:35:03,542 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:35:03,542 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:35:03,543 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:35:03,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:35:03,544 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:35:03,545 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:35:03,545 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:35:03,546 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:35:03,546 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:35:03,547 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:35:03,547 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:35:03,548 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:35:03,549 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:35:03,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:35:03,549 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:35:03,549 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:35:03,550 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:35:03,550 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:35:03,550 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:35:03,550 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:35:03,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:35:03,551 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:35:03,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:35:03,552 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:35:03,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:35:03,553 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:35:03,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:35:03,553 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_f0357d68-0bfc-4e44-9025-2b5b444b6238/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 [2023-11-06 20:35:03,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:35:03,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:35:03,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:35:03,899 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:35:03,900 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:35:03,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2023-11-06 20:35:07,098 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:35:07,385 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:35:07,385 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2023-11-06 20:35:07,402 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/data/4692017f7/a17b6d66a88f42b78ec8ead3591007c4/FLAG2a9441c61 [2023-11-06 20:35:07,424 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/data/4692017f7/a17b6d66a88f42b78ec8ead3591007c4 [2023-11-06 20:35:07,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:35:07,429 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:35:07,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:35:07,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:35:07,445 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:35:07,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:07,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@772e9423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07, skipping insertion in model container [2023-11-06 20:35:07,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:07,533 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:35:07,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:35:07,862 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:35:07,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:35:07,950 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:35:07,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07 WrapperNode [2023-11-06 20:35:07,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:35:07,953 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:35:07,953 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:35:07,953 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:35:07,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:07,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,027 INFO L138 Inliner]: procedures = 119, calls = 46, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 160 [2023-11-06 20:35:08,027 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:35:08,028 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:35:08,029 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:35:08,029 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:35:08,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,082 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:35:08,083 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:35:08,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:35:08,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:35:08,085 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (1/1) ... [2023-11-06 20:35:08,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:35:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:35:08,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:35:08,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:35:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-06 20:35:08,194 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-06 20:35:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:35:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:35:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:35:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:35:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:35:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:35:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:35:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:35:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:35:08,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:35:08,319 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:35:08,321 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:35:08,801 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:35:08,877 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:35:08,877 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-06 20:35:08,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:35:08 BoogieIcfgContainer [2023-11-06 20:35:08,881 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:35:08,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:35:08,884 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:35:08,887 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:35:08,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:35:07" (1/3) ... [2023-11-06 20:35:08,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b492db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:35:08, skipping insertion in model container [2023-11-06 20:35:08,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:35:07" (2/3) ... [2023-11-06 20:35:08,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b492db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:35:08, skipping insertion in model container [2023-11-06 20:35:08,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:35:08" (3/3) ... [2023-11-06 20:35:08,891 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-1.i [2023-11-06 20:35:08,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:35:08,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2023-11-06 20:35:08,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:35:08,975 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;@3c3155c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:35:08,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2023-11-06 20:35:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 70 states have (on average 2.342857142857143) internal successors, (164), 135 states have internal predecessors, (164), 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 20:35:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:35:08,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:08,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:35:08,988 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 20:35:08,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:08,994 INFO L85 PathProgramCache]: Analyzing trace with hash 11049, now seen corresponding path program 1 times [2023-11-06 20:35:09,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:09,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690396540] [2023-11-06 20:35:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:09,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:09,308 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 20:35:09,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:09,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690396540] [2023-11-06 20:35:09,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690396540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:09,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:35:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899723572] [2023-11-06 20:35:09,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:09,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:35:09,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:35:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:35:09,370 INFO L87 Difference]: Start difference. First operand has 144 states, 70 states have (on average 2.342857142857143) internal successors, (164), 135 states have internal predecessors, (164), 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 20:35:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:09,655 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2023-11-06 20:35:09,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:35:09,658 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 20:35:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:09,670 INFO L225 Difference]: With dead ends: 133 [2023-11-06 20:35:09,671 INFO L226 Difference]: Without dead ends: 132 [2023-11-06 20:35:09,673 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 20:35:09,679 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:09,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 79 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-06 20:35:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2023-11-06 20:35:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 64 states have (on average 2.109375) internal successors, (135), 127 states have internal predecessors, (135), 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 20:35:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2023-11-06 20:35:09,729 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 2 [2023-11-06 20:35:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:09,730 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2023-11-06 20:35:09,730 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 20:35:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2023-11-06 20:35:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:35:09,731 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:09,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:35:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:35:09,732 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 20:35:09,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 11050, now seen corresponding path program 1 times [2023-11-06 20:35:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160665364] [2023-11-06 20:35:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:09,857 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 20:35:09,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:09,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160665364] [2023-11-06 20:35:09,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160665364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:09,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:35:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511609000] [2023-11-06 20:35:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:09,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:35:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:35:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:35:09,862 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:10,066 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2023-11-06 20:35:10,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:35:10,067 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 20:35:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:10,069 INFO L225 Difference]: With dead ends: 142 [2023-11-06 20:35:10,070 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 20:35:10,070 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 20:35:10,072 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 109 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:10,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 85 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 20:35:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 131. [2023-11-06 20:35:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 129 states have internal predecessors, (137), 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 20:35:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2023-11-06 20:35:10,087 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 2 [2023-11-06 20:35:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:10,087 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2023-11-06 20:35:10,088 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 20:35:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2023-11-06 20:35:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:35:10,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:10,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:35:10,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:10,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1509069413, now seen corresponding path program 1 times [2023-11-06 20:35:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955489356] [2023-11-06 20:35:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:10,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:10,459 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 20:35:10,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:10,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955489356] [2023-11-06 20:35:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955489356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:10,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:10,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:35:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760268282] [2023-11-06 20:35:10,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:10,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:35:10,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:35:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:35:10,466 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:10,719 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2023-11-06 20:35:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:10,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 20:35:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:10,729 INFO L225 Difference]: With dead ends: 128 [2023-11-06 20:35:10,729 INFO L226 Difference]: Without dead ends: 128 [2023-11-06 20:35:10,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:35:10,737 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 172 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:10,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 64 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-06 20:35:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2023-11-06 20:35:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 116 states have internal predecessors, (126), 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 20:35:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2023-11-06 20:35:10,759 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 7 [2023-11-06 20:35:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:10,760 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2023-11-06 20:35:10,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2023-11-06 20:35:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:35:10,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:10,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:10,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:35:10,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:10,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1509069412, now seen corresponding path program 1 times [2023-11-06 20:35:10,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:10,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716144539] [2023-11-06 20:35:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:10,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:11,088 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 20:35:11,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:11,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716144539] [2023-11-06 20:35:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716144539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189474526] [2023-11-06 20:35:11,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:11,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:35:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:35:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:11,092 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:11,385 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2023-11-06 20:35:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 20:35:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:11,387 INFO L225 Difference]: With dead ends: 147 [2023-11-06 20:35:11,388 INFO L226 Difference]: Without dead ends: 147 [2023-11-06 20:35:11,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:35:11,389 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 277 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:11,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 83 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-06 20:35:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2023-11-06 20:35:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.7125) internal successors, (137), 124 states have internal predecessors, (137), 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 20:35:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2023-11-06 20:35:11,410 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 7 [2023-11-06 20:35:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:11,411 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2023-11-06 20:35:11,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2023-11-06 20:35:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:35:11,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:11,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:35:11,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:11,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1483522884, now seen corresponding path program 1 times [2023-11-06 20:35:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:11,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813158284] [2023-11-06 20:35:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:11,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:11,613 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 20:35:11,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813158284] [2023-11-06 20:35:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813158284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:11,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711438004] [2023-11-06 20:35:11,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:35:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:35:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:35:11,619 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:11,851 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2023-11-06 20:35:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:11,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 20:35:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:11,853 INFO L225 Difference]: With dead ends: 125 [2023-11-06 20:35:11,854 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 20:35:11,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:11,856 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:11,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 287 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 20:35:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-06 20:35:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.6875) internal successors, (135), 123 states have internal predecessors, (135), 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 20:35:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 142 transitions. [2023-11-06 20:35:11,880 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 142 transitions. Word has length 9 [2023-11-06 20:35:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:11,881 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 142 transitions. [2023-11-06 20:35:11,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 142 transitions. [2023-11-06 20:35:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:35:11,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:11,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:35:11,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:11,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1483522885, now seen corresponding path program 1 times [2023-11-06 20:35:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306781654] [2023-11-06 20:35:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:12,132 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 20:35:12,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306781654] [2023-11-06 20:35:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306781654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:12,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:12,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:12,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811386049] [2023-11-06 20:35:12,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:35:12,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:35:12,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:35:12,141 INFO L87 Difference]: Start difference. First operand 125 states and 142 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:12,378 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2023-11-06 20:35:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 20:35:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:12,380 INFO L225 Difference]: With dead ends: 124 [2023-11-06 20:35:12,380 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 20:35:12,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:12,381 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 3 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:12,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 270 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 20:35:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-06 20:35:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.6625) internal successors, (133), 122 states have internal predecessors, (133), 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 20:35:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2023-11-06 20:35:12,387 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 9 [2023-11-06 20:35:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:12,389 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2023-11-06 20:35:12,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2023-11-06 20:35:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:35:12,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:12,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:12,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:35:12,390 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 20:35:12,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -484379826, now seen corresponding path program 1 times [2023-11-06 20:35:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:12,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139986217] [2023-11-06 20:35:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:12,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:12,469 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 20:35:12,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139986217] [2023-11-06 20:35:12,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139986217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:12,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:12,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:35:12,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221687436] [2023-11-06 20:35:12,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:35:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:35:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:35:12,472 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 20:35:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:12,655 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2023-11-06 20:35:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:35:12,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2023-11-06 20:35:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:12,657 INFO L225 Difference]: With dead ends: 133 [2023-11-06 20:35:12,657 INFO L226 Difference]: Without dead ends: 133 [2023-11-06 20:35:12,658 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 20:35:12,662 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 114 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:12,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 145 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-06 20:35:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2023-11-06 20:35:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 80 states have (on average 1.625) internal successors, (130), 121 states have internal predecessors, (130), 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 20:35:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2023-11-06 20:35:12,671 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 11 [2023-11-06 20:35:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:12,671 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2023-11-06 20:35:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 20:35:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2023-11-06 20:35:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:35:12,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:12,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:35:12,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:12,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash -263362710, now seen corresponding path program 1 times [2023-11-06 20:35:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388852682] [2023-11-06 20:35:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:12,978 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 20:35:12,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388852682] [2023-11-06 20:35:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388852682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:12,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:12,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 20:35:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825334286] [2023-11-06 20:35:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:35:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:35:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:35:12,982 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:13,341 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2023-11-06 20:35:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:35:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 20:35:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:13,343 INFO L225 Difference]: With dead ends: 122 [2023-11-06 20:35:13,344 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 20:35:13,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:35:13,345 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 151 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:13,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 158 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:35:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 20:35:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-06 20:35:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 80 states have (on average 1.6125) internal successors, (129), 120 states have internal predecessors, (129), 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 20:35:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2023-11-06 20:35:13,352 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 11 [2023-11-06 20:35:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:13,353 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2023-11-06 20:35:13,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:13,355 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2023-11-06 20:35:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:35:13,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:13,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:13,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:35:13,357 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:13,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -263362709, now seen corresponding path program 1 times [2023-11-06 20:35:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:13,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628164163] [2023-11-06 20:35:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:13,723 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 20:35:13,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628164163] [2023-11-06 20:35:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628164163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:13,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:13,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 20:35:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606350098] [2023-11-06 20:35:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:35:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:35:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:35:13,727 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:14,315 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-11-06 20:35:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 20:35:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 20:35:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:14,317 INFO L225 Difference]: With dead ends: 134 [2023-11-06 20:35:14,317 INFO L226 Difference]: Without dead ends: 134 [2023-11-06 20:35:14,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:35:14,319 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 183 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:14,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 206 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:35:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-06 20:35:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2023-11-06 20:35:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 88 states have (on average 1.5227272727272727) internal successors, (134), 122 states have internal predecessors, (134), 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 20:35:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2023-11-06 20:35:14,325 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 11 [2023-11-06 20:35:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:14,325 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2023-11-06 20:35:14,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2023-11-06 20:35:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:35:14,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:14,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:14,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:35:14,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:14,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:14,328 INFO L85 PathProgramCache]: Analyzing trace with hash 283958596, now seen corresponding path program 1 times [2023-11-06 20:35:14,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:14,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976577821] [2023-11-06 20:35:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:14,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:14,443 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 20:35:14,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:14,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976577821] [2023-11-06 20:35:14,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976577821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:14,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:14,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:35:14,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731582842] [2023-11-06 20:35:14,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:14,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:35:14,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:35:14,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:14,446 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 20:35:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:14,725 INFO L93 Difference]: Finished difference Result 172 states and 195 transitions. [2023-11-06 20:35:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:35:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 14 [2023-11-06 20:35:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:14,727 INFO L225 Difference]: With dead ends: 172 [2023-11-06 20:35:14,727 INFO L226 Difference]: Without dead ends: 172 [2023-11-06 20:35:14,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:35:14,728 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 158 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:14,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 221 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:35:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-06 20:35:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 131. [2023-11-06 20:35:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.4947368421052631) internal successors, (142), 129 states have internal predecessors, (142), 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 20:35:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2023-11-06 20:35:14,733 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 14 [2023-11-06 20:35:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:14,734 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2023-11-06 20:35:14,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 20:35:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2023-11-06 20:35:14,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:35:14,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:14,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:14,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 20:35:14,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:14,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1997883778, now seen corresponding path program 1 times [2023-11-06 20:35:14,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:14,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573798359] [2023-11-06 20:35:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:14,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:14,896 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 20:35:14,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573798359] [2023-11-06 20:35:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573798359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:14,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:14,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970610815] [2023-11-06 20:35:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:14,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:35:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:35:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:35:14,899 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 20:35:15,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:15,080 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2023-11-06 20:35:15,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:15,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-06 20:35:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:15,081 INFO L225 Difference]: With dead ends: 130 [2023-11-06 20:35:15,081 INFO L226 Difference]: Without dead ends: 130 [2023-11-06 20:35:15,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:15,082 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:15,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 263 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:15,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-06 20:35:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-11-06 20:35:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 95 states have (on average 1.4842105263157894) internal successors, (141), 128 states have internal predecessors, (141), 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 20:35:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2023-11-06 20:35:15,087 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 16 [2023-11-06 20:35:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:15,088 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2023-11-06 20:35:15,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 20:35:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2023-11-06 20:35:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:35:15,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:15,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:15,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:35:15,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:15,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1997883777, now seen corresponding path program 1 times [2023-11-06 20:35:15,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:15,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276310511] [2023-11-06 20:35:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:15,316 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 20:35:15,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:15,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276310511] [2023-11-06 20:35:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276310511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:15,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:15,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406618791] [2023-11-06 20:35:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:15,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:35:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:35:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:35:15,319 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 20:35:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:15,486 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2023-11-06 20:35:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:15,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-06 20:35:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:15,488 INFO L225 Difference]: With dead ends: 129 [2023-11-06 20:35:15,488 INFO L226 Difference]: Without dead ends: 129 [2023-11-06 20:35:15,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:15,489 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:15,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 251 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-06 20:35:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-06 20:35:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 127 states have internal predecessors, (140), 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 20:35:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2023-11-06 20:35:15,494 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 16 [2023-11-06 20:35:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:15,494 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2023-11-06 20:35:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 20:35:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2023-11-06 20:35:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:35:15,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:15,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:15,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 20:35:15,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:15,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash 386449231, now seen corresponding path program 1 times [2023-11-06 20:35:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162911872] [2023-11-06 20:35:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:15,583 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 20:35:15,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162911872] [2023-11-06 20:35:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162911872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:15,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:15,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189091073] [2023-11-06 20:35:15,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:35:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:35:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:35:15,586 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 20:35:15,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:15,707 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2023-11-06 20:35:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:35:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 18 [2023-11-06 20:35:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:15,708 INFO L225 Difference]: With dead ends: 128 [2023-11-06 20:35:15,709 INFO L226 Difference]: Without dead ends: 128 [2023-11-06 20:35:15,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:35:15,710 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:15,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 188 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-06 20:35:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-06 20:35:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.4526315789473685) internal successors, (138), 126 states have internal predecessors, (138), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 143 transitions. [2023-11-06 20:35:15,715 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 143 transitions. Word has length 18 [2023-11-06 20:35:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:15,715 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 143 transitions. [2023-11-06 20:35:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 20:35:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 143 transitions. [2023-11-06 20:35:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:35:15,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:15,716 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:15,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 20:35:15,717 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:15,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 567164217, now seen corresponding path program 1 times [2023-11-06 20:35:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:15,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286735211] [2023-11-06 20:35:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:35:15,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286735211] [2023-11-06 20:35:15,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286735211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:35:15,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058976256] [2023-11-06 20:35:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:15,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:35:15,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:35:15,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:35:15,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:35:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:16,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 20:35:16,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:35:16,148 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 20:35:16,156 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 20:35:16,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 20:35:16,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 20:35:16,271 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:35:16,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-06 20:35:16,286 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-06 20:35:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:35:16,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:35:17,036 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 10 treesize of output 8 [2023-11-06 20:35:17,043 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 14 treesize of output 12 [2023-11-06 20:35:17,056 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 10 treesize of output 8 [2023-11-06 20:35:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:35:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:35:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058976256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:35:17,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044511236] [2023-11-06 20:35:17,099 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-06 20:35:17,099 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:35:17,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:35:17,110 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:35:17,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:35:18,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:35:22,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2044511236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:22,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:35:22,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 6, 5] total 20 [2023-11-06 20:35:22,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222213491] [2023-11-06 20:35:22,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:22,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 20:35:22,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:22,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 20:35:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=250, Unknown=6, NotChecked=0, Total=380 [2023-11-06 20:35:22,306 INFO L87 Difference]: Start difference. First operand 128 states and 143 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:28,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 20:35:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:29,843 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2023-11-06 20:35:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:35:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 20:35:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:29,845 INFO L225 Difference]: With dead ends: 148 [2023-11-06 20:35:29,845 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 20:35:29,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=124, Invalid=250, Unknown=6, NotChecked=0, Total=380 [2023-11-06 20:35:29,846 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:29,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 154 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 27 Unknown, 0 Unchecked, 7.5s Time] [2023-11-06 20:35:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 20:35:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2023-11-06 20:35:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 110 states have (on average 1.4090909090909092) internal successors, (155), 141 states have internal predecessors, (155), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2023-11-06 20:35:29,851 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 18 [2023-11-06 20:35:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:29,852 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2023-11-06 20:35:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2023-11-06 20:35:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:35:29,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:29,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:29,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:35:30,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 20:35:30,054 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:30,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -115673361, now seen corresponding path program 1 times [2023-11-06 20:35:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718603630] [2023-11-06 20:35:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:30,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:30,458 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 20:35:30,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718603630] [2023-11-06 20:35:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718603630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:30,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:30,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 20:35:30,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075430211] [2023-11-06 20:35:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:30,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:35:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:35:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:35:30,463 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:30,858 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2023-11-06 20:35:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:35:30,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 20:35:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:30,860 INFO L225 Difference]: With dead ends: 140 [2023-11-06 20:35:30,860 INFO L226 Difference]: Without dead ends: 140 [2023-11-06 20:35:30,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:35:30,861 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 56 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:30,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 282 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:35:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-06 20:35:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2023-11-06 20:35:30,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 120 states have internal predecessors, (131), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2023-11-06 20:35:30,865 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 18 [2023-11-06 20:35:30,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:30,866 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2023-11-06 20:35:30,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2023-11-06 20:35:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:35:30,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:30,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:30,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 20:35:30,867 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:30,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash -115673362, now seen corresponding path program 1 times [2023-11-06 20:35:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:30,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652955521] [2023-11-06 20:35:30,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:30,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:31,150 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 20:35:31,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:31,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652955521] [2023-11-06 20:35:31,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652955521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:31,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:31,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:35:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918552931] [2023-11-06 20:35:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:35:31,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:35:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:35:31,154 INFO L87 Difference]: Start difference. First operand 122 states and 136 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:31,336 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2023-11-06 20:35:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:35:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 20:35:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:31,338 INFO L225 Difference]: With dead ends: 122 [2023-11-06 20:35:31,338 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 20:35:31,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 20:35:31,339 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 39 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:31,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 157 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 20:35:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2023-11-06 20:35:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 96 states have (on average 1.3541666666666667) internal successors, (130), 119 states have internal predecessors, (130), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:31,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2023-11-06 20:35:31,344 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 18 [2023-11-06 20:35:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:31,344 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2023-11-06 20:35:31,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2023-11-06 20:35:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 20:35:31,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:31,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 20:35:31,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:31,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash -23668334, now seen corresponding path program 1 times [2023-11-06 20:35:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:31,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861463648] [2023-11-06 20:35:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:31,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:31,513 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 20:35:31,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:31,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861463648] [2023-11-06 20:35:31,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861463648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:31,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:31,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:35:31,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103009363] [2023-11-06 20:35:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:31,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:35:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:35:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:35:31,516 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20:35:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:31,641 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2023-11-06 20:35:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:35:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 21 [2023-11-06 20:35:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:31,643 INFO L225 Difference]: With dead ends: 121 [2023-11-06 20:35:31,643 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 20:35:31,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 20:35:31,644 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:31,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 184 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 20:35:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-11-06 20:35:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 96 states have (on average 1.34375) internal successors, (129), 118 states have internal predecessors, (129), 4 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 133 transitions. [2023-11-06 20:35:31,649 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 133 transitions. Word has length 21 [2023-11-06 20:35:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:31,651 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 133 transitions. [2023-11-06 20:35:31,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20:35:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 133 transitions. [2023-11-06 20:35:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 20:35:31,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:31,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:31,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 20:35:31,654 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:31,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1324598169, now seen corresponding path program 1 times [2023-11-06 20:35:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:31,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466268108] [2023-11-06 20:35:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:31,788 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 20:35:31,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:31,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466268108] [2023-11-06 20:35:31,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466268108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:31,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:35:31,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:35:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758658445] [2023-11-06 20:35:31,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:31,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:35:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:35:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:35:31,792 INFO L87 Difference]: Start difference. First operand 120 states and 133 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 20:35:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:31,953 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2023-11-06 20:35:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:35:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 23 [2023-11-06 20:35:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:31,954 INFO L225 Difference]: With dead ends: 131 [2023-11-06 20:35:31,955 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 20:35:31,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:35:31,955 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 184 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:31,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 124 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 20:35:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 119. [2023-11-06 20:35:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.3333333333333333) internal successors, (128), 117 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2023-11-06 20:35:31,960 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 23 [2023-11-06 20:35:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:31,961 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2023-11-06 20:35:31,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 20:35:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2023-11-06 20:35:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:35:31,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:31,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:31,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 20:35:31,963 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:31,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash 631695970, now seen corresponding path program 1 times [2023-11-06 20:35:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694724190] [2023-11-06 20:35:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:35:32,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694724190] [2023-11-06 20:35:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694724190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:35:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182483643] [2023-11-06 20:35:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:32,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:35:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:35:32,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:35:32,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:35:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:32,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 20:35:32,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:35:32,215 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-06 20:35:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:35:32,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:35:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182483643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:35:32,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:35:32,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2023-11-06 20:35:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495167663] [2023-11-06 20:35:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:35:32,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:35:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:35:32,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:35:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:35:32,261 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:35:32,376 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2023-11-06 20:35:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:35:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 20:35:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:35:32,377 INFO L225 Difference]: With dead ends: 118 [2023-11-06 20:35:32,377 INFO L226 Difference]: Without dead ends: 118 [2023-11-06 20:35:32,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 20:35:32,378 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:35:32,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 180 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:35:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-06 20:35:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-11-06 20:35:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 114 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2023-11-06 20:35:32,382 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 25 [2023-11-06 20:35:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:35:32,383 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2023-11-06 20:35:32,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:35:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2023-11-06 20:35:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 20:35:32,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:35:32,384 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:35:32,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:35:32,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:35:32,584 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2023-11-06 20:35:32,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:35:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 416685793, now seen corresponding path program 1 times [2023-11-06 20:35:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:35:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493077254] [2023-11-06 20:35:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:32,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:35:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:35:32,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:35:32,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493077254] [2023-11-06 20:35:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493077254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:35:32,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012297099] [2023-11-06 20:35:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:35:32,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:35:32,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:35:32,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:35:32,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0357d68-0bfc-4e44-9025-2b5b444b6238/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:35:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:35:32,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 20:35:32,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:35:32,925 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 20:35:32,932 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 20:35:32,940 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 20:35:32,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 20:35:32,981 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:35:32,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-06 20:35:32,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-11-06 20:35:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:35:33,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:35:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:35:33,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012297099] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:35:33,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157323786] [2023-11-06 20:35:33,330 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-06 20:35:33,330 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:35:33,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:35:33,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:35:33,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:35:34,374 INFO L180 IcfgInterpreter]: Interpretation finished