./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:18:29,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:18:29,502 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-24 23:18:29,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:18:29,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:18:29,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:18:29,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:18:29,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:18:29,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:18:29,554 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:18:29,554 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:18:29,555 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:18:29,555 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:18:29,557 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:18:29,558 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:18:29,558 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:18:29,559 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:18:29,559 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:18:29,560 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:18:29,560 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:18:29,561 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:18:29,562 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:18:29,562 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 23:18:29,563 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 23:18:29,564 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:18:29,564 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:18:29,565 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:18:29,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:18:29,566 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:18:29,566 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 23:18:29,567 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 23:18:29,568 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 23:18:29,568 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:18:29,568 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 23:18:29,569 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:18:29,569 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:18:29,569 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:18:29,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:18:29,569 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:18:29,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:18:29,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:18:29,571 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:18:29,571 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:18:29,571 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:18:29,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:18:29,572 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:18:29,573 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:18:29,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:18:29,573 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_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2023-11-24 23:18:29,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:18:29,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:18:29,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:18:29,895 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:18:29,896 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:18:29,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-11-24 23:18:32,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:18:33,311 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:18:33,316 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2023-11-24 23:18:33,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/data/1e0a03324/e4111edfbe424c669cb39f321e05709f/FLAGb1b9a4ed0 [2023-11-24 23:18:33,366 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/data/1e0a03324/e4111edfbe424c669cb39f321e05709f [2023-11-24 23:18:33,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:18:33,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:18:33,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:18:33,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:18:33,388 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:18:33,389 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:33,390 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc7d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33, skipping insertion in model container [2023-11-24 23:18:33,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:33,465 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:18:33,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:18:33,877 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:18:33,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:18:33,970 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:18:33,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33 WrapperNode [2023-11-24 23:18:33,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:18:33,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:18:33,972 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:18:33,972 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:18:33,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:33,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,036 INFO L138 Inliner]: procedures = 125, calls = 84, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 304 [2023-11-24 23:18:34,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:18:34,038 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:18:34,038 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:18:34,038 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:18:34,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,061 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:18:34,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:18:34,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:18:34,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:18:34,136 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (1/1) ... [2023-11-24 23:18:34,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:18:34,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:18:34,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:18:34,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:18:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:18:34,248 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-11-24 23:18:34,249 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-11-24 23:18:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-24 23:18:34,249 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-24 23:18:34,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:18:34,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:18:34,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:18:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:18:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:18:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:18:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:18:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:18:34,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:18:34,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:18:34,425 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:18:34,427 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:18:35,156 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:18:35,232 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:18:35,232 INFO L309 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-24 23:18:35,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:18:35 BoogieIcfgContainer [2023-11-24 23:18:35,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:18:35,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:18:35,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:18:35,240 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:18:35,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:18:33" (1/3) ... [2023-11-24 23:18:35,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2bf7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:18:35, skipping insertion in model container [2023-11-24 23:18:35,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:33" (2/3) ... [2023-11-24 23:18:35,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2bf7e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:18:35, skipping insertion in model container [2023-11-24 23:18:35,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:18:35" (3/3) ... [2023-11-24 23:18:35,243 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2023-11-24 23:18:35,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:18:35,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2023-11-24 23:18:35,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:18:35,321 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;@2929d5de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:18:35,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2023-11-24 23:18:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 110 states have (on average 2.481818181818182) internal successors, (273), 230 states have internal predecessors, (273), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-24 23:18:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:18:35,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:35,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:18:35,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:35,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:35,340 INFO L85 PathProgramCache]: Analyzing trace with hash 19246841, now seen corresponding path program 1 times [2023-11-24 23:18:35,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:35,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190725777] [2023-11-24 23:18:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:35,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:35,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190725777] [2023-11-24 23:18:35,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190725777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:35,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:35,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:18:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021934093] [2023-11-24 23:18:35,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:35,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:18:35,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:35,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:18:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:35,755 INFO L87 Difference]: Start difference. First operand has 233 states, 110 states have (on average 2.481818181818182) internal successors, (273), 230 states have internal predecessors, (273), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:36,057 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2023-11-24 23:18:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:18:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 23:18:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:36,075 INFO L225 Difference]: With dead ends: 229 [2023-11-24 23:18:36,075 INFO L226 Difference]: Without dead ends: 228 [2023-11-24 23:18:36,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:36,085 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 8 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:36,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 362 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-11-24 23:18:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2023-11-24 23:18:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 109 states have (on average 2.165137614678899) internal successors, (236), 225 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 253 transitions. [2023-11-24 23:18:36,168 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 253 transitions. Word has length 4 [2023-11-24 23:18:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:36,169 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 253 transitions. [2023-11-24 23:18:36,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 253 transitions. [2023-11-24 23:18:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 23:18:36,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:36,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 23:18:36,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:18:36,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:36,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 19246842, now seen corresponding path program 1 times [2023-11-24 23:18:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:36,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807802426] [2023-11-24 23:18:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:36,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807802426] [2023-11-24 23:18:36,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807802426] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:36,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:36,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:18:36,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949958062] [2023-11-24 23:18:36,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:36,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:18:36,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:18:36,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:36,300 INFO L87 Difference]: Start difference. First operand 228 states and 253 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:36,518 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2023-11-24 23:18:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:18:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 23:18:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:36,525 INFO L225 Difference]: With dead ends: 226 [2023-11-24 23:18:36,525 INFO L226 Difference]: Without dead ends: 226 [2023-11-24 23:18:36,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:36,531 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 6 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:36,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 369 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-24 23:18:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-11-24 23:18:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 109 states have (on average 2.146788990825688) internal successors, (234), 223 states have internal predecessors, (234), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 251 transitions. [2023-11-24 23:18:36,557 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 251 transitions. Word has length 4 [2023-11-24 23:18:36,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:36,558 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 251 transitions. [2023-11-24 23:18:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 251 transitions. [2023-11-24 23:18:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:18:36,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:36,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:18:36,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:18:36,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:36,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 596106590, now seen corresponding path program 1 times [2023-11-24 23:18:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:36,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344639776] [2023-11-24 23:18:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:36,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344639776] [2023-11-24 23:18:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344639776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:36,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:18:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514884515] [2023-11-24 23:18:36,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:36,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:18:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:18:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:36,623 INFO L87 Difference]: Start difference. First operand 226 states and 251 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:36,892 INFO L93 Difference]: Finished difference Result 351 states and 395 transitions. [2023-11-24 23:18:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:18:36,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 23:18:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:36,896 INFO L225 Difference]: With dead ends: 351 [2023-11-24 23:18:36,901 INFO L226 Difference]: Without dead ends: 350 [2023-11-24 23:18:36,902 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 [2023-11-24 23:18:36,904 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 125 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:36,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 315 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-24 23:18:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 229. [2023-11-24 23:18:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 112 states have (on average 2.125) internal successors, (238), 226 states have internal predecessors, (238), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 255 transitions. [2023-11-24 23:18:36,924 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 255 transitions. Word has length 5 [2023-11-24 23:18:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:36,924 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 255 transitions. [2023-11-24 23:18:36,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 255 transitions. [2023-11-24 23:18:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:18:36,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:36,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:18:36,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:18:36,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:36,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1316884147, now seen corresponding path program 1 times [2023-11-24 23:18:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556066877] [2023-11-24 23:18:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:37,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556066877] [2023-11-24 23:18:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556066877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:37,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:18:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468804065] [2023-11-24 23:18:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:18:37,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:37,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:18:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:37,036 INFO L87 Difference]: Start difference. First operand 229 states and 255 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:37,212 INFO L93 Difference]: Finished difference Result 227 states and 253 transitions. [2023-11-24 23:18:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:18:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 23:18:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:37,214 INFO L225 Difference]: With dead ends: 227 [2023-11-24 23:18:37,214 INFO L226 Difference]: Without dead ends: 227 [2023-11-24 23:18:37,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:37,216 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:37,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 360 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-24 23:18:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-24 23:18:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 112 states have (on average 2.107142857142857) internal successors, (236), 224 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2023-11-24 23:18:37,228 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 6 [2023-11-24 23:18:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2023-11-24 23:18:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2023-11-24 23:18:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:18:37,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:37,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:18:37,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:18:37,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:37,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:37,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1316884148, now seen corresponding path program 1 times [2023-11-24 23:18:37,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:37,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417065744] [2023-11-24 23:18:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:37,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:37,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:37,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417065744] [2023-11-24 23:18:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417065744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:37,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:37,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:18:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770226666] [2023-11-24 23:18:37,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:37,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:18:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:18:37,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:37,422 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:37,590 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2023-11-24 23:18:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:18:37,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 23:18:37,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:37,592 INFO L225 Difference]: With dead ends: 225 [2023-11-24 23:18:37,593 INFO L226 Difference]: Without dead ends: 225 [2023-11-24 23:18:37,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:37,594 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:37,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 367 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-24 23:18:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-11-24 23:18:37,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 222 states have internal predecessors, (234), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2023-11-24 23:18:37,604 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 6 [2023-11-24 23:18:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:37,604 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2023-11-24 23:18:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2023-11-24 23:18:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 23:18:37,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:37,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:18:37,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:18:37,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:37,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1627403256, now seen corresponding path program 1 times [2023-11-24 23:18:37,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:37,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140391728] [2023-11-24 23:18:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:37,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:37,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140391728] [2023-11-24 23:18:37,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140391728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:37,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:37,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:18:37,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807157775] [2023-11-24 23:18:37,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:37,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:18:37,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:18:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:37,639 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2023-11-24 23:18:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:37,732 INFO L93 Difference]: Finished difference Result 231 states and 255 transitions. [2023-11-24 23:18:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:18:37,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2023-11-24 23:18:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:37,736 INFO L225 Difference]: With dead ends: 231 [2023-11-24 23:18:37,737 INFO L226 Difference]: Without dead ends: 230 [2023-11-24 23:18:37,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:18:37,738 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 5 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:37,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 419 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:18:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-24 23:18:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2023-11-24 23:18:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 111 states have (on average 2.09009009009009) internal successors, (232), 221 states have internal predecessors, (232), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 249 transitions. [2023-11-24 23:18:37,747 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 249 transitions. Word has length 7 [2023-11-24 23:18:37,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:37,747 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 249 transitions. [2023-11-24 23:18:37,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2023-11-24 23:18:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 249 transitions. [2023-11-24 23:18:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 23:18:37,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:37,748 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:18:37,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:18:37,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:37,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1157839681, now seen corresponding path program 1 times [2023-11-24 23:18:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:37,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522255063] [2023-11-24 23:18:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:37,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522255063] [2023-11-24 23:18:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522255063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:37,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:37,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:18:37,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685329442] [2023-11-24 23:18:37,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:37,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:18:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:18:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:18:37,833 INFO L87 Difference]: Start difference. First operand 224 states and 249 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2023-11-24 23:18:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:38,003 INFO L93 Difference]: Finished difference Result 355 states and 395 transitions. [2023-11-24 23:18:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:18:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2023-11-24 23:18:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:38,006 INFO L225 Difference]: With dead ends: 355 [2023-11-24 23:18:38,007 INFO L226 Difference]: Without dead ends: 355 [2023-11-24 23:18:38,007 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 [2023-11-24 23:18:38,010 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 199 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:38,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 551 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:18:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-11-24 23:18:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 224. [2023-11-24 23:18:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 111 states have (on average 2.081081081081081) internal successors, (231), 221 states have internal predecessors, (231), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 248 transitions. [2023-11-24 23:18:38,026 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 248 transitions. Word has length 11 [2023-11-24 23:18:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:38,026 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 248 transitions. [2023-11-24 23:18:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2023-11-24 23:18:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 248 transitions. [2023-11-24 23:18:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:18:38,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:38,028 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:18:38,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:18:38,029 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:38,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 287024411, now seen corresponding path program 1 times [2023-11-24 23:18:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:38,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652856556] [2023-11-24 23:18:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:38,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:38,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652856556] [2023-11-24 23:18:38,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652856556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:38,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:38,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:18:38,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735651542] [2023-11-24 23:18:38,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:38,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:18:38,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:18:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:18:38,190 INFO L87 Difference]: Start difference. First operand 224 states and 248 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:38,606 INFO L93 Difference]: Finished difference Result 280 states and 313 transitions. [2023-11-24 23:18:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:18:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 23:18:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:38,608 INFO L225 Difference]: With dead ends: 280 [2023-11-24 23:18:38,608 INFO L226 Difference]: Without dead ends: 280 [2023-11-24 23:18:38,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:18:38,609 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 208 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:38,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 383 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:18:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-24 23:18:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 217. [2023-11-24 23:18:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 113 states have (on average 2.0) internal successors, (226), 214 states have internal predecessors, (226), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2023-11-24 23:18:38,621 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 13 [2023-11-24 23:18:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:38,621 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2023-11-24 23:18:38,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2023-11-24 23:18:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:18:38,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:38,623 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:18:38,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:18:38,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:38,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash 287024412, now seen corresponding path program 1 times [2023-11-24 23:18:38,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:38,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277638111] [2023-11-24 23:18:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:38,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:38,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:38,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277638111] [2023-11-24 23:18:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277638111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:38,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:18:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669662726] [2023-11-24 23:18:38,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:38,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:18:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:18:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:18:38,844 INFO L87 Difference]: Start difference. First operand 217 states and 243 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:39,302 INFO L93 Difference]: Finished difference Result 327 states and 368 transitions. [2023-11-24 23:18:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:18:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 23:18:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:39,305 INFO L225 Difference]: With dead ends: 327 [2023-11-24 23:18:39,305 INFO L226 Difference]: Without dead ends: 327 [2023-11-24 23:18:39,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:18:39,306 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 207 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:39,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 472 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:18:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-11-24 23:18:39,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 261. [2023-11-24 23:18:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 157 states have (on average 1.8853503184713376) internal successors, (296), 258 states have internal predecessors, (296), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2023-11-24 23:18:39,317 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 13 [2023-11-24 23:18:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:39,317 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2023-11-24 23:18:39,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2023-11-24 23:18:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:18:39,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:39,319 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:18:39,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:18:39,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:39,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:39,321 INFO L85 PathProgramCache]: Analyzing trace with hash 963354789, now seen corresponding path program 1 times [2023-11-24 23:18:39,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:39,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350186429] [2023-11-24 23:18:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:39,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:39,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:39,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350186429] [2023-11-24 23:18:39,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350186429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:39,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:39,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:18:39,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832847169] [2023-11-24 23:18:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:39,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:18:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:18:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:18:39,402 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-24 23:18:39,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:39,678 INFO L93 Difference]: Finished difference Result 378 states and 423 transitions. [2023-11-24 23:18:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:18:39,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 15 [2023-11-24 23:18:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:39,681 INFO L225 Difference]: With dead ends: 378 [2023-11-24 23:18:39,682 INFO L226 Difference]: Without dead ends: 378 [2023-11-24 23:18:39,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:18:39,683 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 263 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:39,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 693 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-11-24 23:18:39,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 260. [2023-11-24 23:18:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.8662420382165605) internal successors, (293), 257 states have internal predecessors, (293), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 309 transitions. [2023-11-24 23:18:39,695 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 309 transitions. Word has length 15 [2023-11-24 23:18:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:39,695 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 309 transitions. [2023-11-24 23:18:39,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-11-24 23:18:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 309 transitions. [2023-11-24 23:18:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:18:39,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:39,697 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] [2023-11-24 23:18:39,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:18:39,698 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:39,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash -474178139, now seen corresponding path program 1 times [2023-11-24 23:18:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:39,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724118010] [2023-11-24 23:18:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:18:39,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:39,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724118010] [2023-11-24 23:18:39,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724118010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:39,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:39,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:18:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130557430] [2023-11-24 23:18:39,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:39,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:18:39,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:39,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:18:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:18:39,828 INFO L87 Difference]: Start difference. First operand 260 states and 309 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-11-24 23:18:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:40,058 INFO L93 Difference]: Finished difference Result 259 states and 306 transitions. [2023-11-24 23:18:40,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:18:40,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 22 [2023-11-24 23:18:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:40,061 INFO L225 Difference]: With dead ends: 259 [2023-11-24 23:18:40,061 INFO L226 Difference]: Without dead ends: 259 [2023-11-24 23:18:40,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:18:40,062 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 18 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:40,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 688 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:40,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-24 23:18:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-24 23:18:40,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 157 states have (on average 1.8535031847133758) internal successors, (291), 256 states have internal predecessors, (291), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 306 transitions. [2023-11-24 23:18:40,071 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 306 transitions. Word has length 22 [2023-11-24 23:18:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:40,072 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 306 transitions. [2023-11-24 23:18:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-11-24 23:18:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 306 transitions. [2023-11-24 23:18:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:18:40,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:40,075 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] [2023-11-24 23:18:40,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:18:40,075 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:40,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1519961105, now seen corresponding path program 1 times [2023-11-24 23:18:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:40,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490916107] [2023-11-24 23:18:40,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:40,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:18:40,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490916107] [2023-11-24 23:18:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490916107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:40,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:40,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:18:40,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643173026] [2023-11-24 23:18:40,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:18:40,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:18:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:18:40,206 INFO L87 Difference]: Start difference. First operand 259 states and 306 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-11-24 23:18:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:40,448 INFO L93 Difference]: Finished difference Result 258 states and 303 transitions. [2023-11-24 23:18:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:18:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 22 [2023-11-24 23:18:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:40,450 INFO L225 Difference]: With dead ends: 258 [2023-11-24 23:18:40,451 INFO L226 Difference]: Without dead ends: 258 [2023-11-24 23:18:40,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:18:40,451 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 19 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:40,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 678 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:18:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-24 23:18:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2023-11-24 23:18:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 157 states have (on average 1.8407643312101911) internal successors, (289), 255 states have internal predecessors, (289), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 303 transitions. [2023-11-24 23:18:40,462 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 303 transitions. Word has length 22 [2023-11-24 23:18:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:40,462 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 303 transitions. [2023-11-24 23:18:40,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2023-11-24 23:18:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 303 transitions. [2023-11-24 23:18:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:18:40,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:40,466 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] [2023-11-24 23:18:40,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:18:40,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:40,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1265066606, now seen corresponding path program 1 times [2023-11-24 23:18:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:40,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232046112] [2023-11-24 23:18:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:40,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:40,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232046112] [2023-11-24 23:18:40,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232046112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:40,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:40,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:18:40,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303687138] [2023-11-24 23:18:40,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:40,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:18:40,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:18:40,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:18:40,759 INFO L87 Difference]: Start difference. First operand 258 states and 303 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:41,368 INFO L93 Difference]: Finished difference Result 307 states and 341 transitions. [2023-11-24 23:18:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:18:41,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 23:18:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:41,371 INFO L225 Difference]: With dead ends: 307 [2023-11-24 23:18:41,371 INFO L226 Difference]: Without dead ends: 307 [2023-11-24 23:18:41,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:18:41,372 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 172 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:41,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 817 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:18:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-24 23:18:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 259. [2023-11-24 23:18:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8417721518987342) internal successors, (291), 256 states have internal predecessors, (291), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 305 transitions. [2023-11-24 23:18:41,381 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 305 transitions. Word has length 24 [2023-11-24 23:18:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:41,382 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 305 transitions. [2023-11-24 23:18:41,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 305 transitions. [2023-11-24 23:18:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:18:41,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:41,383 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] [2023-11-24 23:18:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:18:41,384 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:41,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1265066607, now seen corresponding path program 1 times [2023-11-24 23:18:41,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:41,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170450625] [2023-11-24 23:18:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:41,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170450625] [2023-11-24 23:18:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170450625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:41,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:41,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:18:41,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991925296] [2023-11-24 23:18:41,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:41,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:18:41,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:41,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:18:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:18:41,866 INFO L87 Difference]: Start difference. First operand 259 states and 305 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:42,652 INFO L93 Difference]: Finished difference Result 315 states and 349 transitions. [2023-11-24 23:18:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:18:42,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 23:18:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:42,655 INFO L225 Difference]: With dead ends: 315 [2023-11-24 23:18:42,655 INFO L226 Difference]: Without dead ends: 315 [2023-11-24 23:18:42,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:18:42,656 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 181 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:42,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 771 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:18:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-24 23:18:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 259. [2023-11-24 23:18:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8354430379746836) internal successors, (290), 256 states have internal predecessors, (290), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 304 transitions. [2023-11-24 23:18:42,663 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 304 transitions. Word has length 24 [2023-11-24 23:18:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:42,664 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 304 transitions. [2023-11-24 23:18:42,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 304 transitions. [2023-11-24 23:18:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:18:42,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:42,665 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] [2023-11-24 23:18:42,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:18:42,666 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:42,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:42,666 INFO L85 PathProgramCache]: Analyzing trace with hash 569020687, now seen corresponding path program 1 times [2023-11-24 23:18:42,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:42,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106401498] [2023-11-24 23:18:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:42,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:42,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106401498] [2023-11-24 23:18:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106401498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:42,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:18:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577684058] [2023-11-24 23:18:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:18:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:18:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:18:42,888 INFO L87 Difference]: Start difference. First operand 259 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-24 23:18:43,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:43,251 INFO L93 Difference]: Finished difference Result 317 states and 350 transitions. [2023-11-24 23:18:43,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:18:43,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 25 [2023-11-24 23:18:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:43,254 INFO L225 Difference]: With dead ends: 317 [2023-11-24 23:18:43,254 INFO L226 Difference]: Without dead ends: 317 [2023-11-24 23:18:43,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:18:43,255 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 184 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:43,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 946 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:18:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-11-24 23:18:43,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 259. [2023-11-24 23:18:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8291139240506329) internal successors, (289), 256 states have internal predecessors, (289), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 303 transitions. [2023-11-24 23:18:43,266 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 303 transitions. Word has length 25 [2023-11-24 23:18:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:43,266 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 303 transitions. [2023-11-24 23:18:43,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-24 23:18:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 303 transitions. [2023-11-24 23:18:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:18:43,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:43,269 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] [2023-11-24 23:18:43,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:18:43,270 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:43,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1045036322, now seen corresponding path program 1 times [2023-11-24 23:18:43,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:43,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786351151] [2023-11-24 23:18:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:43,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:43,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786351151] [2023-11-24 23:18:43,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786351151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:43,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:43,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:18:43,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225963854] [2023-11-24 23:18:43,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:43,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:18:43,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:18:43,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:18:43,447 INFO L87 Difference]: Start difference. First operand 259 states and 303 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-24 23:18:43,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:43,806 INFO L93 Difference]: Finished difference Result 316 states and 348 transitions. [2023-11-24 23:18:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:18:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 25 [2023-11-24 23:18:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:43,808 INFO L225 Difference]: With dead ends: 316 [2023-11-24 23:18:43,808 INFO L226 Difference]: Without dead ends: 316 [2023-11-24 23:18:43,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:18:43,809 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 182 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:43,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 946 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:18:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-11-24 23:18:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 259. [2023-11-24 23:18:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8227848101265822) internal successors, (288), 256 states have internal predecessors, (288), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 302 transitions. [2023-11-24 23:18:43,821 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 302 transitions. Word has length 25 [2023-11-24 23:18:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:43,821 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 302 transitions. [2023-11-24 23:18:43,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-24 23:18:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 302 transitions. [2023-11-24 23:18:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:18:43,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:43,824 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] [2023-11-24 23:18:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 23:18:43,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:43,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -936410096, now seen corresponding path program 1 times [2023-11-24 23:18:43,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:43,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651617931] [2023-11-24 23:18:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:44,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:44,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651617931] [2023-11-24 23:18:44,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651617931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:44,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:44,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:18:44,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245098456] [2023-11-24 23:18:44,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:44,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:18:44,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:44,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:18:44,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:18:44,134 INFO L87 Difference]: Start difference. First operand 259 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:44,738 INFO L93 Difference]: Finished difference Result 303 states and 335 transitions. [2023-11-24 23:18:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:18:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 23:18:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:44,741 INFO L225 Difference]: With dead ends: 303 [2023-11-24 23:18:44,741 INFO L226 Difference]: Without dead ends: 303 [2023-11-24 23:18:44,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:18:44,742 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 164 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:44,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 817 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:18:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-24 23:18:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 259. [2023-11-24 23:18:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8164556962025316) internal successors, (287), 256 states have internal predecessors, (287), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 301 transitions. [2023-11-24 23:18:44,751 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 301 transitions. Word has length 24 [2023-11-24 23:18:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:44,752 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 301 transitions. [2023-11-24 23:18:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 301 transitions. [2023-11-24 23:18:44,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 23:18:44,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:44,753 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] [2023-11-24 23:18:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 23:18:44,753 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:44,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -936410095, now seen corresponding path program 1 times [2023-11-24 23:18:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671891044] [2023-11-24 23:18:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:45,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671891044] [2023-11-24 23:18:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671891044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:45,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:45,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:18:45,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292181181] [2023-11-24 23:18:45,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:45,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:18:45,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:18:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:18:45,207 INFO L87 Difference]: Start difference. First operand 259 states and 301 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:45,836 INFO L93 Difference]: Finished difference Result 311 states and 343 transitions. [2023-11-24 23:18:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:18:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 23:18:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:45,840 INFO L225 Difference]: With dead ends: 311 [2023-11-24 23:18:45,840 INFO L226 Difference]: Without dead ends: 311 [2023-11-24 23:18:45,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:18:45,841 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 174 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:45,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 695 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:18:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-24 23:18:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 259. [2023-11-24 23:18:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 158 states have (on average 1.8101265822784811) internal successors, (286), 256 states have internal predecessors, (286), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2023-11-24 23:18:45,849 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 24 [2023-11-24 23:18:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:45,850 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2023-11-24 23:18:45,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:18:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2023-11-24 23:18:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:18:45,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:45,851 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, 1, 1, 1] [2023-11-24 23:18:45,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 23:18:45,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:45,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1053164132, now seen corresponding path program 1 times [2023-11-24 23:18:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:45,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644224441] [2023-11-24 23:18:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:45,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:46,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:46,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644224441] [2023-11-24 23:18:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644224441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:46,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:46,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:18:46,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855803480] [2023-11-24 23:18:46,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:18:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:18:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:18:46,356 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-24 23:18:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:47,016 INFO L93 Difference]: Finished difference Result 313 states and 344 transitions. [2023-11-24 23:18:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:18:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2023-11-24 23:18:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:47,019 INFO L225 Difference]: With dead ends: 313 [2023-11-24 23:18:47,019 INFO L226 Difference]: Without dead ends: 313 [2023-11-24 23:18:47,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:18:47,020 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 173 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:47,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1203 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:18:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-24 23:18:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 260. [2023-11-24 23:18:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.8050314465408805) internal successors, (287), 257 states have internal predecessors, (287), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 301 transitions. [2023-11-24 23:18:47,031 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 301 transitions. Word has length 29 [2023-11-24 23:18:47,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:47,033 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 301 transitions. [2023-11-24 23:18:47,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-24 23:18:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 301 transitions. [2023-11-24 23:18:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:18:47,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:47,034 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, 1, 1, 1] [2023-11-24 23:18:47,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 23:18:47,034 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:47,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1631211375, now seen corresponding path program 1 times [2023-11-24 23:18:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:47,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352485981] [2023-11-24 23:18:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:47,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:47,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352485981] [2023-11-24 23:18:47,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352485981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:47,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:47,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:18:47,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916909737] [2023-11-24 23:18:47,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:47,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:18:47,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:47,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:18:47,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:18:47,533 INFO L87 Difference]: Start difference. First operand 260 states and 301 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-24 23:18:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:48,222 INFO L93 Difference]: Finished difference Result 312 states and 342 transitions. [2023-11-24 23:18:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:18:48,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2023-11-24 23:18:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:48,224 INFO L225 Difference]: With dead ends: 312 [2023-11-24 23:18:48,224 INFO L226 Difference]: Without dead ends: 312 [2023-11-24 23:18:48,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:18:48,225 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 171 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:48,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 1203 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:18:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-24 23:18:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 260. [2023-11-24 23:18:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 159 states have (on average 1.79874213836478) internal successors, (286), 257 states have internal predecessors, (286), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:18:48,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 300 transitions. [2023-11-24 23:18:48,234 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 300 transitions. Word has length 29 [2023-11-24 23:18:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:48,235 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 300 transitions. [2023-11-24 23:18:48,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2023-11-24 23:18:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 300 transitions. [2023-11-24 23:18:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 23:18:48,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:48,236 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, 1, 1] [2023-11-24 23:18:48,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 23:18:48,237 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:18:48,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1576383330, now seen corresponding path program 1 times [2023-11-24 23:18:48,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:48,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230524473] [2023-11-24 23:18:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:48,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:48,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230524473] [2023-11-24 23:18:48,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230524473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:18:48,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194158394] [2023-11-24 23:18:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:48,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:18:48,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:18:48,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:18:48,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:18:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:48,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-24 23:18:48,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:18:48,943 INFO L378 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 [2023-11-24 23:18:48,951 INFO L378 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 [2023-11-24 23:18:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:49,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:18:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:18:49,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194158394] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:18:49,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [886108238] [2023-11-24 23:18:49,392 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-24 23:18:49,393 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:18:49,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:18:49,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:18:49,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:18:56,277 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:19:01,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11373#(and (or (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_main_~data~0#1.base| 0))) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_43| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_35| Int)) (and (= |ULTIMATE.start_inspect_before_~shape#1.offset| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 4))) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 4))) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_35| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_35|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) 1)))) (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-11-24 23:19:01,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:19:01,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:19:01,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 14 [2023-11-24 23:19:01,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627848264] [2023-11-24 23:19:01,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:19:01,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 23:19:01,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:01,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 23:19:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=997, Unknown=1, NotChecked=0, Total=1122 [2023-11-24 23:19:01,234 INFO L87 Difference]: Start difference. First operand 260 states and 300 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 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) [2023-11-24 23:19:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:01,949 INFO L93 Difference]: Finished difference Result 357 states and 406 transitions. [2023-11-24 23:19:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:19:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 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 28 [2023-11-24 23:19:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:01,952 INFO L225 Difference]: With dead ends: 357 [2023-11-24 23:19:01,952 INFO L226 Difference]: Without dead ends: 357 [2023-11-24 23:19:01,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=138, Invalid=1121, Unknown=1, NotChecked=0, Total=1260 [2023-11-24 23:19:01,954 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 196 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:01,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1662 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:19:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-24 23:19:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 271. [2023-11-24 23:19:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 170 states have (on average 1.7529411764705882) internal successors, (298), 268 states have internal predecessors, (298), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 312 transitions. [2023-11-24 23:19:01,963 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 312 transitions. Word has length 28 [2023-11-24 23:19:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:01,964 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 312 transitions. [2023-11-24 23:19:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 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) [2023-11-24 23:19:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 312 transitions. [2023-11-24 23:19:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:19:01,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:01,965 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, 1, 1, 1, 1, 1] [2023-11-24 23:19:01,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:02,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:02,172 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:02,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:02,172 INFO L85 PathProgramCache]: Analyzing trace with hash 6715688, now seen corresponding path program 1 times [2023-11-24 23:19:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:02,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12260095] [2023-11-24 23:19:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:02,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:19:02,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:02,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12260095] [2023-11-24 23:19:02,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12260095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:02,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:02,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:19:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117059644] [2023-11-24 23:19:02,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:02,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:19:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:19:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:19:02,272 INFO L87 Difference]: Start difference. First operand 271 states and 312 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:02,630 INFO L93 Difference]: Finished difference Result 324 states and 374 transitions. [2023-11-24 23:19:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:02,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-24 23:19:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:02,634 INFO L225 Difference]: With dead ends: 324 [2023-11-24 23:19:02,634 INFO L226 Difference]: Without dead ends: 324 [2023-11-24 23:19:02,635 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 [2023-11-24 23:19:02,635 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 257 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:02,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-24 23:19:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 271. [2023-11-24 23:19:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 172 states have (on average 1.744186046511628) internal successors, (300), 268 states have internal predecessors, (300), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 314 transitions. [2023-11-24 23:19:02,645 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 314 transitions. Word has length 31 [2023-11-24 23:19:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:02,645 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 314 transitions. [2023-11-24 23:19:02,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:19:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 314 transitions. [2023-11-24 23:19:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 23:19:02,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:02,646 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, 1, 1, 1, 1, 1] [2023-11-24 23:19:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 23:19:02,647 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:02,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 6715689, now seen corresponding path program 1 times [2023-11-24 23:19:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:02,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736157375] [2023-11-24 23:19:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:02,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736157375] [2023-11-24 23:19:02,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736157375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:02,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:02,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617964205] [2023-11-24 23:19:02,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:02,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:02,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:02,803 INFO L87 Difference]: Start difference. First operand 271 states and 314 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 23:19:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:03,288 INFO L93 Difference]: Finished difference Result 311 states and 344 transitions. [2023-11-24 23:19:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:03,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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 31 [2023-11-24 23:19:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:03,291 INFO L225 Difference]: With dead ends: 311 [2023-11-24 23:19:03,291 INFO L226 Difference]: Without dead ends: 311 [2023-11-24 23:19:03,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:03,292 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 106 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:03,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 471 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:19:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-11-24 23:19:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 276. [2023-11-24 23:19:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.734463276836158) internal successors, (307), 273 states have internal predecessors, (307), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 321 transitions. [2023-11-24 23:19:03,301 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 321 transitions. Word has length 31 [2023-11-24 23:19:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:03,302 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 321 transitions. [2023-11-24 23:19:03,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 23:19:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 321 transitions. [2023-11-24 23:19:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 23:19:03,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:03,303 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, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:03,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 23:19:03,303 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:03,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:03,304 INFO L85 PathProgramCache]: Analyzing trace with hash 208509347, now seen corresponding path program 1 times [2023-11-24 23:19:03,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:03,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717273399] [2023-11-24 23:19:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:03,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:03,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:03,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717273399] [2023-11-24 23:19:03,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717273399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:03,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:03,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:19:03,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448524243] [2023-11-24 23:19:03,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:03,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:03,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:03,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:03,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:03,400 INFO L87 Difference]: Start difference. First operand 276 states and 321 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2023-11-24 23:19:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:03,665 INFO L93 Difference]: Finished difference Result 426 states and 474 transitions. [2023-11-24 23:19:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:03,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 32 [2023-11-24 23:19:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:03,668 INFO L225 Difference]: With dead ends: 426 [2023-11-24 23:19:03,668 INFO L226 Difference]: Without dead ends: 426 [2023-11-24 23:19:03,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:03,669 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 281 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:03,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 747 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:03,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-11-24 23:19:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 276. [2023-11-24 23:19:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 177 states have (on average 1.728813559322034) internal successors, (306), 273 states have internal predecessors, (306), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2023-11-24 23:19:03,678 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 32 [2023-11-24 23:19:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:03,679 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2023-11-24 23:19:03,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2023-11-24 23:19:03,679 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2023-11-24 23:19:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 23:19:03,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:03,680 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:03,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-24 23:19:03,680 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:03,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2134110155, now seen corresponding path program 1 times [2023-11-24 23:19:03,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:03,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694122862] [2023-11-24 23:19:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:03,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:19:03,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694122862] [2023-11-24 23:19:03,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694122862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:03,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:03,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:19:03,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125790822] [2023-11-24 23:19:03,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:03,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:19:03,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:03,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:19:03,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:19:03,775 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-11-24 23:19:04,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:04,075 INFO L93 Difference]: Finished difference Result 325 states and 373 transitions. [2023-11-24 23:19:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:19:04,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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 33 [2023-11-24 23:19:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:04,077 INFO L225 Difference]: With dead ends: 325 [2023-11-24 23:19:04,078 INFO L226 Difference]: Without dead ends: 325 [2023-11-24 23:19:04,078 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 [2023-11-24 23:19:04,078 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 176 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:04,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 299 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-24 23:19:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 273. [2023-11-24 23:19:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 177 states have (on average 1.694915254237288) internal successors, (300), 270 states have internal predecessors, (300), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 314 transitions. [2023-11-24 23:19:04,093 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 314 transitions. Word has length 33 [2023-11-24 23:19:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:04,093 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 314 transitions. [2023-11-24 23:19:04,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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) [2023-11-24 23:19:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 314 transitions. [2023-11-24 23:19:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 23:19:04,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:04,095 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:04,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-24 23:19:04,096 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:04,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:04,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2134110154, now seen corresponding path program 1 times [2023-11-24 23:19:04,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:04,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541109257] [2023-11-24 23:19:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:04,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:04,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:04,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541109257] [2023-11-24 23:19:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541109257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:04,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:04,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:04,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772790901] [2023-11-24 23:19:04,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:04,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:04,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:04,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:04,263 INFO L87 Difference]: Start difference. First operand 273 states and 314 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-11-24 23:19:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:04,698 INFO L93 Difference]: Finished difference Result 302 states and 334 transitions. [2023-11-24 23:19:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:04,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2023-11-24 23:19:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:04,701 INFO L225 Difference]: With dead ends: 302 [2023-11-24 23:19:04,701 INFO L226 Difference]: Without dead ends: 302 [2023-11-24 23:19:04,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:04,702 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 115 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:04,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 460 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:19:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-24 23:19:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2023-11-24 23:19:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 177 states have (on average 1.6779661016949152) internal successors, (297), 270 states have internal predecessors, (297), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 311 transitions. [2023-11-24 23:19:04,712 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 311 transitions. Word has length 33 [2023-11-24 23:19:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:04,713 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 311 transitions. [2023-11-24 23:19:04,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 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) [2023-11-24 23:19:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 311 transitions. [2023-11-24 23:19:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:19:04,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:04,714 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:04,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-24 23:19:04,714 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:04,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash -933009889, now seen corresponding path program 2 times [2023-11-24 23:19:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:04,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453453773] [2023-11-24 23:19:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:04,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:05,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:05,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453453773] [2023-11-24 23:19:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453453773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:19:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687827640] [2023-11-24 23:19:05,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:19:05,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:05,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:05,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:05,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:19:05,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:19:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:19:05,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-24 23:19:05,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:05,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 23:19:05,556 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 23:19:05,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-24 23:19:05,601 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-24 23:19:05,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2023-11-24 23:19:05,646 INFO L378 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 15 treesize of output 1 [2023-11-24 23:19:05,685 INFO L378 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 37 treesize of output 25 [2023-11-24 23:19:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-11-24 23:19:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:06,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:19:06,518 INFO L378 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 38 treesize of output 34 [2023-11-24 23:19:06,524 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:06,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 148 [2023-11-24 23:19:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:19:06,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687827640] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:19:06,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884410983] [2023-11-24 23:19:06,760 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-24 23:19:06,760 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:19:06,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:19:06,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:19:06,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:19:12,601 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:19:17,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15344#(and (<= 1 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (or (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.offset_40| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.base_49| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 4)) |ULTIMATE.start_inspect_before_~shape#1.offset|) (= |ULTIMATE.start_inspect_before_~shape#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 4))) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|) 1) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_40| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_49|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_40|))) (and (= |ULTIMATE.start_inspect_before_~shape#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= |ULTIMATE.start_main_~data~0#1.base| |ULTIMATE.start_inspect_before_#in~shape#1.base|) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0)))) (= |ULTIMATE.start_inspect_before_#in~shape#1.offset| 0))' at error location [2023-11-24 23:19:17,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:19:17,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:19:17,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 25 [2023-11-24 23:19:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766261026] [2023-11-24 23:19:17,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:19:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 23:19:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 23:19:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1789, Unknown=1, NotChecked=0, Total=1980 [2023-11-24 23:19:17,538 INFO L87 Difference]: Start difference. First operand 273 states and 311 transitions. Second operand has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 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) [2023-11-24 23:19:19,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:19,638 INFO L93 Difference]: Finished difference Result 390 states and 442 transitions. [2023-11-24 23:19:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 23:19:19,638 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 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 34 [2023-11-24 23:19:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:19,641 INFO L225 Difference]: With dead ends: 390 [2023-11-24 23:19:19,641 INFO L226 Difference]: Without dead ends: 390 [2023-11-24 23:19:19,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=338, Invalid=2741, Unknown=1, NotChecked=0, Total=3080 [2023-11-24 23:19:19,643 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 692 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:19,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1773 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1946 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 23:19:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-11-24 23:19:19,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 274. [2023-11-24 23:19:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 178 states have (on average 1.6797752808988764) internal successors, (299), 271 states have internal predecessors, (299), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:19:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 313 transitions. [2023-11-24 23:19:19,653 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 313 transitions. Word has length 34 [2023-11-24 23:19:19,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:19,654 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 313 transitions. [2023-11-24 23:19:19,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 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) [2023-11-24 23:19:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 313 transitions. [2023-11-24 23:19:19,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:19:19,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:19,655 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:19,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:19:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a64f2c11-1b22-40db-b3d7-8136ca6f01d5/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 23:19:19,863 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2023-11-24 23:19:19,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash -933009888, now seen corresponding path program 1 times [2023-11-24 23:19:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:19,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137755556] [2023-11-24 23:19:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:19,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat