./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_equal.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_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:25:17,032 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:25:17,098 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:25:17,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:25:17,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:25:17,126 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:25:17,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:25:17,127 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:25:17,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:25:17,128 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:25:17,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:25:17,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:25:17,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:25:17,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:25:17,131 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:25:17,132 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:25:17,132 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:25:17,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:25:17,133 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:25:17,134 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:25:17,134 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:25:17,135 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:25:17,136 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:25:17,136 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:25:17,137 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:25:17,137 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:25:17,137 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:25:17,138 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:25:17,138 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:25:17,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:25:17,139 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:25:17,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:25:17,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:25:17,140 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:25:17,140 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:25:17,141 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:25:17,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:25:17,141 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:25:17,141 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:25:17,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:25:17,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:25:17,142 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab [2023-11-29 00:25:17,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:25:17,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:25:17,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:25:17,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:25:17,410 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:25:17,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2023-11-29 00:25:20,193 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:25:20,438 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:25:20,439 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2023-11-29 00:25:20,452 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/data/3faf0a56c/78fe11a240ca4a37be9534ac7d006569/FLAGb32abeb9a [2023-11-29 00:25:20,463 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/data/3faf0a56c/78fe11a240ca4a37be9534ac7d006569 [2023-11-29 00:25:20,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:25:20,466 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:25:20,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:25:20,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:25:20,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:25:20,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:20,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b7497c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20, skipping insertion in model container [2023-11-29 00:25:20,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:20,520 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:25:20,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:25:20,855 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:25:20,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:25:20,937 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:25:20,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20 WrapperNode [2023-11-29 00:25:20,937 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:25:20,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:25:20,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:25:20,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:25:20,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:20,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:20,992 INFO L138 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 148 [2023-11-29 00:25:20,993 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:25:20,994 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:25:20,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:25:20,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:25:21,007 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,012 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,037 INFO L175 MemorySlicer]: Split 24 memory accesses to 3 slices as follows [2, 13, 9]. 54 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 8 writes are split as follows [0, 7, 1]. [2023-11-29 00:25:21,037 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,051 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:25:21,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:25:21,060 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:25:21,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:25:21,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (1/1) ... [2023-11-29 00:25:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:25:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:21,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:25:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:25:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:25:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:25:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:25:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:25:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:25:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:25:21,131 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-29 00:25:21,132 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-29 00:25:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 00:25:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:25:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:25:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 00:25:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 00:25:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 00:25:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 00:25:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 00:25:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 00:25:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:25:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-29 00:25:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-29 00:25:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-29 00:25:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:25:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:25:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:25:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:25:21,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:25:21,272 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:25:21,274 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:25:21,596 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:25:21,639 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:25:21,640 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 00:25:21,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:25:21 BoogieIcfgContainer [2023-11-29 00:25:21,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:25:21,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:25:21,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:25:21,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:25:21,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:25:20" (1/3) ... [2023-11-29 00:25:21,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595b017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:25:21, skipping insertion in model container [2023-11-29 00:25:21,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:25:20" (2/3) ... [2023-11-29 00:25:21,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595b017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:25:21, skipping insertion in model container [2023-11-29 00:25:21,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:25:21" (3/3) ... [2023-11-29 00:25:21,649 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2023-11-29 00:25:21,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:25:21,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-29 00:25:21,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:25:21,744 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=PETRI_NET, 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;@6d7fb568, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:25:21,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-29 00:25:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 49 states have (on average 2.306122448979592) internal successors, (113), 99 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:25:21,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:21,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:25:21,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:21,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:21,762 INFO L85 PathProgramCache]: Analyzing trace with hash 227600450, now seen corresponding path program 1 times [2023-11-29 00:25:21,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:21,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221832825] [2023-11-29 00:25:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:21,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:22,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221832825] [2023-11-29 00:25:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221832825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:22,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:22,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:25:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164734068] [2023-11-29 00:25:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:25:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:25:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:25:22,044 INFO L87 Difference]: Start difference. First operand has 104 states, 49 states have (on average 2.306122448979592) internal successors, (113), 99 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-29 00:25:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:22,175 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2023-11-29 00:25:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:25:22,177 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), 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 5 [2023-11-29 00:25:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:22,186 INFO L225 Difference]: With dead ends: 101 [2023-11-29 00:25:22,186 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 00:25:22,188 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 [2023-11-29 00:25:22,191 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:22,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:25:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 00:25:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-29 00:25:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 47 states have (on average 2.148936170212766) internal successors, (101), 94 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2023-11-29 00:25:22,238 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 5 [2023-11-29 00:25:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:22,238 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2023-11-29 00:25:22,238 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), 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) [2023-11-29 00:25:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2023-11-29 00:25:22,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:25:22,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:22,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:25:22,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:25:22,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:22,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:22,241 INFO L85 PathProgramCache]: Analyzing trace with hash 227600451, now seen corresponding path program 1 times [2023-11-29 00:25:22,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:22,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308589479] [2023-11-29 00:25:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:22,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308589479] [2023-11-29 00:25:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308589479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:22,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:22,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:25:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128109427] [2023-11-29 00:25:22,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:22,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:25:22,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:25:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:25:22,356 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-29 00:25:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:22,445 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-11-29 00:25:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:25:22,445 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), 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 5 [2023-11-29 00:25:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:22,447 INFO L225 Difference]: With dead ends: 97 [2023-11-29 00:25:22,447 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 00:25:22,448 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 [2023-11-29 00:25:22,449 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:22,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 150 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:25:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 00:25:22,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-29 00:25:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 47 states have (on average 2.106382978723404) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2023-11-29 00:25:22,461 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 5 [2023-11-29 00:25:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:22,461 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2023-11-29 00:25:22,461 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), 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) [2023-11-29 00:25:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2023-11-29 00:25:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:25:22,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:22,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:22,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:25:22,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:22,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1271624451, now seen corresponding path program 1 times [2023-11-29 00:25:22,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:22,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80059838] [2023-11-29 00:25:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:22,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:25:22,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80059838] [2023-11-29 00:25:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80059838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:22,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:25:22,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969420026] [2023-11-29 00:25:22,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:22,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:25:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:25:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:22,592 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 00:25:22,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:22,720 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-11-29 00:25:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:25:22,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-29 00:25:22,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:22,722 INFO L225 Difference]: With dead ends: 98 [2023-11-29 00:25:22,722 INFO L226 Difference]: Without dead ends: 98 [2023-11-29 00:25:22,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:25:22,724 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 4 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:22,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:25:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-29 00:25:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-29 00:25:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 93 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-11-29 00:25:22,734 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 10 [2023-11-29 00:25:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:22,735 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-11-29 00:25:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-29 00:25:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-11-29 00:25:22,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 00:25:22,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:22,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:22,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:25:22,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:22,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 310161943, now seen corresponding path program 1 times [2023-11-29 00:25:22,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:22,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240162667] [2023-11-29 00:25:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:22,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:25:22,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:22,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240162667] [2023-11-29 00:25:22,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240162667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:22,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:22,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:25:22,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906348083] [2023-11-29 00:25:22,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:22,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:25:22,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:25:22,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:25:22,924 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:25:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:23,172 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2023-11-29 00:25:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:25:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-29 00:25:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:23,175 INFO L225 Difference]: With dead ends: 97 [2023-11-29 00:25:23,175 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 00:25:23,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:25:23,177 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 3 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:23,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 321 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:25:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 00:25:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-29 00:25:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 48 states have (on average 2.0625) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2023-11-29 00:25:23,185 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 17 [2023-11-29 00:25:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:23,186 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2023-11-29 00:25:23,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:25:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2023-11-29 00:25:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 00:25:23,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:23,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:23,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:25:23,187 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:23,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:23,188 INFO L85 PathProgramCache]: Analyzing trace with hash 310161944, now seen corresponding path program 1 times [2023-11-29 00:25:23,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:23,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074476700] [2023-11-29 00:25:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:23,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:23,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074476700] [2023-11-29 00:25:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074476700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:23,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:23,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:25:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413314580] [2023-11-29 00:25:23,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:25:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:25:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:25:23,455 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:25:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:23,677 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-11-29 00:25:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:25:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-29 00:25:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:23,679 INFO L225 Difference]: With dead ends: 96 [2023-11-29 00:25:23,679 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 00:25:23,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:25:23,680 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:23,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 345 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:25:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 00:25:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-29 00:25:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 91 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2023-11-29 00:25:23,688 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 17 [2023-11-29 00:25:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:23,688 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2023-11-29 00:25:23,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-29 00:25:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2023-11-29 00:25:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:25:23,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:23,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:23,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:25:23,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:23,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:23,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1713071559, now seen corresponding path program 1 times [2023-11-29 00:25:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874033718] [2023-11-29 00:25:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:23,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:23,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:25:24,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:24,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874033718] [2023-11-29 00:25:24,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874033718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:24,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812197489] [2023-11-29 00:25:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:24,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:24,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:24,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:24,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:25:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:24,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:25:24,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:24,187 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 [2023-11-29 00:25:24,233 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-29 00:25:24,283 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-29 00:25:24,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 00:25:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-29 00:25:24,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812197489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:24,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:25:24,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-29 00:25:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224116449] [2023-11-29 00:25:24,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 00:25:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 00:25:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-29 00:25:24,359 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:25:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:24,618 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-11-29 00:25:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:25:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-29 00:25:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:24,620 INFO L225 Difference]: With dead ends: 95 [2023-11-29 00:25:24,620 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 00:25:24,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-29 00:25:24,621 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 3 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:24,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 324 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2023-11-29 00:25:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 00:25:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-29 00:25:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 90 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-29 00:25:24,629 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 19 [2023-11-29 00:25:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:24,629 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-29 00:25:24,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:25:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-29 00:25:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:25:24,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:24,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:24,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:24,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:24,834 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:24,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1713071560, now seen corresponding path program 1 times [2023-11-29 00:25:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:24,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076814564] [2023-11-29 00:25:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:25,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:25,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 00:25:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076814564] [2023-11-29 00:25:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076814564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771672185] [2023-11-29 00:25:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:25,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:25,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:25:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:25,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:25:25,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:25,406 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 [2023-11-29 00:25:25,571 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-29 00:25:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:25:25,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-29 00:25:25,614 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 00:25:25,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 00:25:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-29 00:25:25,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771672185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:25,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:25:25,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-29 00:25:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996762462] [2023-11-29 00:25:25,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:25:25,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:25:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=232, Unknown=1, NotChecked=30, Total=306 [2023-11-29 00:25:25,809 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 00:25:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:26,262 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2023-11-29 00:25:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:25:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2023-11-29 00:25:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:26,265 INFO L225 Difference]: With dead ends: 95 [2023-11-29 00:25:26,265 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 00:25:26,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=354, Unknown=1, NotChecked=38, Total=462 [2023-11-29 00:25:26,266 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 3 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:26,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 500 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2023-11-29 00:25:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 00:25:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2023-11-29 00:25:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 48 states have (on average 2.0) internal successors, (96), 89 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2023-11-29 00:25:26,281 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 19 [2023-11-29 00:25:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:26,282 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2023-11-29 00:25:26,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-29 00:25:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2023-11-29 00:25:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:25:26,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:26,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:26,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:25:26,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:26,490 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:26,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:26,491 INFO L85 PathProgramCache]: Analyzing trace with hash -219065859, now seen corresponding path program 1 times [2023-11-29 00:25:26,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:26,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216399082] [2023-11-29 00:25:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:26,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:26,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:26,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:26,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:25:26,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:26,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216399082] [2023-11-29 00:25:26,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216399082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643169412] [2023-11-29 00:25:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:26,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:26,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:26,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:25:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:27,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:25:27,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:27,111 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 [2023-11-29 00:25:27,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:25:27,141 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2023-11-29 00:25:27,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:25:27,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-29 00:25:27,184 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-29 00:25:27,202 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 00:25:27,202 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 12 treesize of output 14 [2023-11-29 00:25:27,242 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-29 00:25:27,242 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 12 treesize of output 14 [2023-11-29 00:25:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2023-11-29 00:25:27,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:27,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643169412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:27,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:25:27,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-11-29 00:25:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776034081] [2023-11-29 00:25:27,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:27,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 00:25:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 00:25:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=121, Unknown=2, NotChecked=46, Total=210 [2023-11-29 00:25:27,533 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 00:25:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:27,820 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2023-11-29 00:25:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:25:27,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 27 [2023-11-29 00:25:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:27,822 INFO L225 Difference]: With dead ends: 103 [2023-11-29 00:25:27,822 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 00:25:27,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=162, Unknown=2, NotChecked=54, Total=272 [2023-11-29 00:25:27,823 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 180 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:27,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 184 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 264 Invalid, 0 Unknown, 214 Unchecked, 0.2s Time] [2023-11-29 00:25:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 00:25:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2023-11-29 00:25:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 81 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-29 00:25:27,829 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 27 [2023-11-29 00:25:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:27,829 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-29 00:25:27,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-29 00:25:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-29 00:25:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:25:27,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:27,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:27,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:28,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:28,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:28,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -219065858, now seen corresponding path program 1 times [2023-11-29 00:25:28,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:28,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755305241] [2023-11-29 00:25:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:25:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755305241] [2023-11-29 00:25:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755305241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:28,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:28,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:25:28,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605272765] [2023-11-29 00:25:28,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:28,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:25:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:25:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:25:28,589 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 9 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:28,851 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2023-11-29 00:25:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:25:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-11-29 00:25:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:28,853 INFO L225 Difference]: With dead ends: 95 [2023-11-29 00:25:28,853 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 00:25:28,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:25:28,854 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 171 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:28,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 135 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:25:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 00:25:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2023-11-29 00:25:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 73 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-29 00:25:28,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 27 [2023-11-29 00:25:28,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:28,860 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-29 00:25:28,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-29 00:25:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 00:25:28,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:28,862 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:25:28,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:28,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash -68892802, now seen corresponding path program 1 times [2023-11-29 00:25:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:28,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322052763] [2023-11-29 00:25:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:28,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:25:29,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:29,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322052763] [2023-11-29 00:25:29,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322052763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:29,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:29,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:25:29,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363740107] [2023-11-29 00:25:29,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:29,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:25:29,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:29,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:25:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:25:29,008 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 00:25:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:29,177 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-11-29 00:25:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:25:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-29 00:25:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:29,178 INFO L225 Difference]: With dead ends: 76 [2023-11-29 00:25:29,178 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 00:25:29,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:25:29,179 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 22 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:29,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 236 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:25:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 00:25:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-29 00:25:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.625) internal successors, (78), 71 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2023-11-29 00:25:29,183 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 29 [2023-11-29 00:25:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:29,183 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2023-11-29 00:25:29,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 00:25:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2023-11-29 00:25:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 00:25:29,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:29,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:25:29,185 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash -68892801, now seen corresponding path program 1 times [2023-11-29 00:25:29,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666918041] [2023-11-29 00:25:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:25:29,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666918041] [2023-11-29 00:25:29,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666918041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825971596] [2023-11-29 00:25:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:29,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:29,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:29,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:25:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:29,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:25:29,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 00:25:29,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:25:29,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825971596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:29,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:25:29,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-29 00:25:29,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861871407] [2023-11-29 00:25:29,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:29,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:25:29,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:29,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:25:29,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:25:29,679 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 00:25:29,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:29,807 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-29 00:25:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:25:29,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-29 00:25:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:29,808 INFO L225 Difference]: With dead ends: 74 [2023-11-29 00:25:29,808 INFO L226 Difference]: Without dead ends: 74 [2023-11-29 00:25:29,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:25:29,809 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 19 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:29,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 240 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:25:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-29 00:25:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-29 00:25:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 69 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2023-11-29 00:25:29,813 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 29 [2023-11-29 00:25:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:29,813 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2023-11-29 00:25:29,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 00:25:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2023-11-29 00:25:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:25:29,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:29,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:29,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:25:30,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:25:30,018 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:30,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2135663788, now seen corresponding path program 1 times [2023-11-29 00:25:30,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:30,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171453896] [2023-11-29 00:25:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:30,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:30,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:30,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:25:30,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:30,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171453896] [2023-11-29 00:25:30,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171453896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:30,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137423689] [2023-11-29 00:25:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:30,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:30,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:30,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:30,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:25:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:30,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:25:30,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:30,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:25:30,684 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-29 00:25:30,706 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 00:25:30,707 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 18 [2023-11-29 00:25:30,746 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 17 treesize of output 9 [2023-11-29 00:25:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 00:25:30,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:25:30,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137423689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:30,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:25:30,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2023-11-29 00:25:30,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496420331] [2023-11-29 00:25:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:30,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:25:30,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:30,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:25:30,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=205, Unknown=1, NotChecked=28, Total=272 [2023-11-29 00:25:30,750 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:25:30,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:30,880 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-29 00:25:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:25:30,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-29 00:25:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:30,882 INFO L225 Difference]: With dead ends: 76 [2023-11-29 00:25:30,882 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 00:25:30,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=261, Unknown=1, NotChecked=32, Total=342 [2023-11-29 00:25:30,883 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 28 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:30,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 208 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2023-11-29 00:25:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 00:25:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2023-11-29 00:25:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 68 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2023-11-29 00:25:30,887 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 30 [2023-11-29 00:25:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:30,887 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2023-11-29 00:25:30,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:25:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2023-11-29 00:25:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 00:25:30,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:30,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:30,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:25:31,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:31,090 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:31,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2135663787, now seen corresponding path program 1 times [2023-11-29 00:25:31,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:31,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393640270] [2023-11-29 00:25:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:31,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:31,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:25:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393640270] [2023-11-29 00:25:31,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393640270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793477209] [2023-11-29 00:25:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:31,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:31,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:31,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:31,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:25:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:31,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 00:25:31,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:31,711 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 [2023-11-29 00:25:31,721 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 8 treesize of output 1 [2023-11-29 00:25:31,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:25:31,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:25:31,975 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_4|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2023-11-29 00:25:32,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:25:32,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 13 [2023-11-29 00:25:32,023 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 00:25:32,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 00:25:32,095 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 17 treesize of output 9 [2023-11-29 00:25:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-29 00:25:32,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:32,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793477209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:32,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:25:32,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-11-29 00:25:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010188781] [2023-11-29 00:25:32,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:32,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:25:32,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:25:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=540, Unknown=1, NotChecked=46, Total=650 [2023-11-29 00:25:32,294 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 23 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 00:25:33,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:33,165 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2023-11-29 00:25:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:25:33,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2023-11-29 00:25:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:33,167 INFO L225 Difference]: With dead ends: 88 [2023-11-29 00:25:33,167 INFO L226 Difference]: Without dead ends: 88 [2023-11-29 00:25:33,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=1254, Unknown=1, NotChecked=72, Total=1482 [2023-11-29 00:25:33,170 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:33,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 649 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 686 Invalid, 0 Unknown, 93 Unchecked, 0.5s Time] [2023-11-29 00:25:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-29 00:25:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2023-11-29 00:25:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 76 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-11-29 00:25:33,174 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 30 [2023-11-29 00:25:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:33,175 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-11-29 00:25:33,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.5) internal successors, (45), 19 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-29 00:25:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-11-29 00:25:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 00:25:33,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:33,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:33,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:25:33,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:33,377 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:33,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1696480531, now seen corresponding path program 1 times [2023-11-29 00:25:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376578270] [2023-11-29 00:25:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:33,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:33,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 00:25:33,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:33,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376578270] [2023-11-29 00:25:33,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376578270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:25:33,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:25:33,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:25:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070228202] [2023-11-29 00:25:33,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:25:33,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:25:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:25:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:25:33,692 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 10 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:25:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:33,945 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2023-11-29 00:25:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:25:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2023-11-29 00:25:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:33,947 INFO L225 Difference]: With dead ends: 128 [2023-11-29 00:25:33,947 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 00:25:33,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-29 00:25:33,948 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:33,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 261 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:25:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 00:25:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2023-11-29 00:25:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.45) internal successors, (87), 78 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2023-11-29 00:25:33,953 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 33 [2023-11-29 00:25:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:33,954 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2023-11-29 00:25:33,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:25:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2023-11-29 00:25:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 00:25:33,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:33,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:25:33,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1696480532, now seen corresponding path program 1 times [2023-11-29 00:25:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986743325] [2023-11-29 00:25:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:34,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:34,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:34,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:25:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:25:34,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:25:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986743325] [2023-11-29 00:25:34,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986743325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:25:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356144765] [2023-11-29 00:25:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:34,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:34,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:25:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:34,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:25:34,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:34,652 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 16 treesize of output 8 [2023-11-29 00:25:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:25:34,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:25:34,708 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 8 treesize of output 4 [2023-11-29 00:25:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 00:25:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356144765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:25:34,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:25:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 18 [2023-11-29 00:25:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067940268] [2023-11-29 00:25:34,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:25:34,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:25:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:25:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:25:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:25:34,743 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 00:25:38,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:42,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:46,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:50,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:54,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:59,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:25:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:59,102 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2023-11-29 00:25:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 00:25:59,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 33 [2023-11-29 00:25:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:59,105 INFO L225 Difference]: With dead ends: 82 [2023-11-29 00:25:59,105 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 00:25:59,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:25:59,107 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 164 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:59,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 528 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 6 Unknown, 0 Unchecked, 24.2s Time] [2023-11-29 00:25:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 00:25:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-11-29 00:25:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 73 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:25:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2023-11-29 00:25:59,112 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 33 [2023-11-29 00:25:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:59,113 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2023-11-29 00:25:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-29 00:25:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2023-11-29 00:25:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:25:59,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:59,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:59,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:25:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:59,318 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:25:59,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash 230355910, now seen corresponding path program 1 times [2023-11-29 00:25:59,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:59,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928241505] [2023-11-29 00:25:59,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:59,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:59,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:25:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:25:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:00,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928241505] [2023-11-29 00:26:00,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928241505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:00,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970247442] [2023-11-29 00:26:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:00,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:00,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:26:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:00,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 00:26:00,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:00,510 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 [2023-11-29 00:26:00,679 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:26:00,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:26:00,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:00,870 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:00,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2023-11-29 00:26:00,926 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 30 treesize of output 14 [2023-11-29 00:26:00,930 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 15 treesize of output 7 [2023-11-29 00:26:01,086 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_7| Int)) (<= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_7|) 0) 0))) is different from true [2023-11-29 00:26:01,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:01,099 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 38 treesize of output 27 [2023-11-29 00:26:01,132 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-11-29 00:26:01,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2023-11-29 00:26:01,220 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 46 treesize of output 26 [2023-11-29 00:26:01,222 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 15 treesize of output 7 [2023-11-29 00:26:01,333 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 25 treesize of output 13 [2023-11-29 00:26:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 00:26:01,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970247442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:01,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2023-11-29 00:26:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574092018] [2023-11-29 00:26:01,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:26:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:26:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1354, Unknown=1, NotChecked=74, Total=1560 [2023-11-29 00:26:01,529 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 37 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:02,624 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2023-11-29 00:26:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:26:02,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2023-11-29 00:26:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:02,626 INFO L225 Difference]: With dead ends: 115 [2023-11-29 00:26:02,626 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 00:26:02,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=2481, Unknown=1, NotChecked=102, Total=2862 [2023-11-29 00:26:02,627 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 174 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:02,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 850 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1119 Invalid, 0 Unknown, 116 Unchecked, 0.7s Time] [2023-11-29 00:26:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 00:26:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2023-11-29 00:26:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 90 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 00:26:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2023-11-29 00:26:02,633 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 34 [2023-11-29 00:26:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:02,633 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2023-11-29 00:26:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2023-11-29 00:26:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:26:02,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:02,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:02,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:26:02,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:26:02,838 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:02,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:02,838 INFO L85 PathProgramCache]: Analyzing trace with hash 230355911, now seen corresponding path program 1 times [2023-11-29 00:26:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:02,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665992226] [2023-11-29 00:26:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:02,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:03,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:04,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665992226] [2023-11-29 00:26:04,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665992226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629455677] [2023-11-29 00:26:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:04,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:04,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:04,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:26:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:04,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-29 00:26:04,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:04,577 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 [2023-11-29 00:26:04,805 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:26:04,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:26:04,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:04,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:05,023 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:05,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 60 [2023-11-29 00:26:05,033 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 36 treesize of output 15 [2023-11-29 00:26:05,105 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 43 treesize of output 19 [2023-11-29 00:26:05,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-29 00:26:05,115 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 15 treesize of output 7 [2023-11-29 00:26:05,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:26:05,326 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8| Int)) (<= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|) 0) 0))) is different from true [2023-11-29 00:26:05,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:05,343 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 51 treesize of output 34 [2023-11-29 00:26:05,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:05,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 00:26:05,372 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:26:05,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:26:05,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:26:05,481 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 48 treesize of output 28 [2023-11-29 00:26:05,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:26:05,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-11-29 00:26:05,730 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 25 treesize of output 13 [2023-11-29 00:26:05,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 00:26:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 00:26:05,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:06,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629455677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:06,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2023-11-29 00:26:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350318559] [2023-11-29 00:26:06,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:06,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 00:26:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 00:26:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1931, Unknown=1, NotChecked=88, Total=2162 [2023-11-29 00:26:06,218 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 42 states, 32 states have (on average 1.75) internal successors, (56), 35 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:08,274 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2023-11-29 00:26:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:26:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 1.75) internal successors, (56), 35 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2023-11-29 00:26:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:08,276 INFO L225 Difference]: With dead ends: 120 [2023-11-29 00:26:08,277 INFO L226 Difference]: Without dead ends: 120 [2023-11-29 00:26:08,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=332, Invalid=3703, Unknown=1, NotChecked=124, Total=4160 [2023-11-29 00:26:08,280 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 188 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:08,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 937 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1268 Invalid, 0 Unknown, 122 Unchecked, 1.0s Time] [2023-11-29 00:26:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-29 00:26:08,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2023-11-29 00:26:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.380281690140845) internal successors, (98), 89 states have internal predecessors, (98), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 00:26:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2023-11-29 00:26:08,284 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 34 [2023-11-29 00:26:08,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:08,285 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2023-11-29 00:26:08,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 1.75) internal successors, (56), 35 states have internal predecessors, (56), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2023-11-29 00:26:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 00:26:08,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:08,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-11-29 00:26:08,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:26:08,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:26:08,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:08,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1005452951, now seen corresponding path program 1 times [2023-11-29 00:26:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:08,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647440902] [2023-11-29 00:26:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:08,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:08,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 00:26:08,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:08,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647440902] [2023-11-29 00:26:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647440902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:08,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:26:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128079860] [2023-11-29 00:26:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:08,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:26:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:08,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:26:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:26:08,776 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:26:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:08,939 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2023-11-29 00:26:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:26:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-11-29 00:26:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:08,941 INFO L225 Difference]: With dead ends: 128 [2023-11-29 00:26:08,941 INFO L226 Difference]: Without dead ends: 128 [2023-11-29 00:26:08,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:26:08,942 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:08,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 182 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:26:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-29 00:26:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2023-11-29 00:26:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 90 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 00:26:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2023-11-29 00:26:08,948 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 38 [2023-11-29 00:26:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:08,949 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2023-11-29 00:26:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 00:26:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2023-11-29 00:26:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 00:26:08,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:08,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-11-29 00:26:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 00:26:08,951 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1005452950, now seen corresponding path program 1 times [2023-11-29 00:26:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:08,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306461874] [2023-11-29 00:26:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:09,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:09,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:09,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:09,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306461874] [2023-11-29 00:26:09,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306461874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:09,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967580950] [2023-11-29 00:26:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:09,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:09,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:09,900 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:09,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:26:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:10,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-29 00:26:10,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:10,178 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 8 treesize of output 1 [2023-11-29 00:26:10,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:26:10,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:26:10,489 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 00:26:10,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 00:26:10,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 13 [2023-11-29 00:26:10,611 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 17 treesize of output 9 [2023-11-29 00:26:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 00:26:10,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:10,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967580950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:10,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:10,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-11-29 00:26:10,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063647234] [2023-11-29 00:26:10,849 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:10,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 00:26:10,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 00:26:10,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:26:10,851 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 27 states, 20 states have (on average 2.7) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 00:26:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:11,559 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2023-11-29 00:26:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:26:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.7) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2023-11-29 00:26:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:11,561 INFO L225 Difference]: With dead ends: 129 [2023-11-29 00:26:11,561 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 00:26:11,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 00:26:11,563 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 185 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:11,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 400 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:26:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 00:26:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2023-11-29 00:26:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.3783783783783783) internal successors, (102), 92 states have internal predecessors, (102), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 00:26:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2023-11-29 00:26:11,569 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 38 [2023-11-29 00:26:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:11,570 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2023-11-29 00:26:11,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.7) internal successors, (54), 22 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-29 00:26:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2023-11-29 00:26:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 00:26:11,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:11,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:11,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:26:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:11,772 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 201065272, now seen corresponding path program 2 times [2023-11-29 00:26:11,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:11,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940436554] [2023-11-29 00:26:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:12,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:12,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940436554] [2023-11-29 00:26:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940436554] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:12,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759691542] [2023-11-29 00:26:12,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:26:12,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:12,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:12,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:12,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:26:13,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:26:13,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:26:13,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 121 conjunts are in the unsatisfiable core [2023-11-29 00:26:13,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:13,108 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 [2023-11-29 00:26:13,372 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:26:13,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:26:13,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:13,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:13,582 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2023-11-29 00:26:13,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 50 [2023-11-29 00:26:13,594 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 39 treesize of output 30 [2023-11-29 00:26:13,680 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 00:26:13,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 31 [2023-11-29 00:26:13,686 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 15 treesize of output 7 [2023-11-29 00:26:13,692 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 19 treesize of output 7 [2023-11-29 00:26:13,875 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_9|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|)))))) is different from true [2023-11-29 00:26:13,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:13,906 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-29 00:26:13,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 55 [2023-11-29 00:26:13,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:13,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:13,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-11-29 00:26:13,934 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:26:13,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:26:14,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-11-29 00:26:14,512 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 54 treesize of output 30 [2023-11-29 00:26:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-29 00:26:14,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759691542] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:15,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:15,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 43 [2023-11-29 00:26:15,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589205761] [2023-11-29 00:26:15,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:15,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:26:15,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:26:15,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2098, Unknown=1, NotChecked=92, Total=2352 [2023-11-29 00:26:15,070 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 43 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 36 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:16,577 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2023-11-29 00:26:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:26:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 36 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-11-29 00:26:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:16,578 INFO L225 Difference]: With dead ends: 109 [2023-11-29 00:26:16,578 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 00:26:16,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=334, Invalid=3329, Unknown=1, NotChecked=118, Total=3782 [2023-11-29 00:26:16,580 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 120 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:16,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1048 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1257 Invalid, 0 Unknown, 106 Unchecked, 0.9s Time] [2023-11-29 00:26:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 00:26:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2023-11-29 00:26:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 95 states have internal predecessors, (105), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 00:26:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2023-11-29 00:26:16,583 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 38 [2023-11-29 00:26:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:16,584 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2023-11-29 00:26:16,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 36 states have internal predecessors, (64), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2023-11-29 00:26:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 00:26:16,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:16,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-11-29 00:26:16,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:26:16,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:16,785 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:16,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:16,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2131801485, now seen corresponding path program 1 times [2023-11-29 00:26:16,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:16,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216414661] [2023-11-29 00:26:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:16,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:17,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216414661] [2023-11-29 00:26:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216414661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276314728] [2023-11-29 00:26:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:17,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:26:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:17,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-29 00:26:17,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:17,771 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 [2023-11-29 00:26:17,930 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:26:17,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:26:18,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:18,081 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:18,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2023-11-29 00:26:18,133 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 30 treesize of output 14 [2023-11-29 00:26:18,137 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 15 treesize of output 7 [2023-11-29 00:26:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:18,334 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 38 treesize of output 27 [2023-11-29 00:26:18,350 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:26:18,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:26:18,503 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 00:26:18,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:26:18,546 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 28 treesize of output 12 [2023-11-29 00:26:18,577 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 16 treesize of output 8 [2023-11-29 00:26:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:18,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:18,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276314728] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:18,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:18,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 40 [2023-11-29 00:26:18,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900167376] [2023-11-29 00:26:18,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:18,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 00:26:18,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:18,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 00:26:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 00:26:18,785 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 40 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:19,686 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2023-11-29 00:26:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:26:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2023-11-29 00:26:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:19,687 INFO L225 Difference]: With dead ends: 108 [2023-11-29 00:26:19,687 INFO L226 Difference]: Without dead ends: 108 [2023-11-29 00:26:19,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=286, Invalid=2794, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:26:19,688 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 112 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:19,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1000 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:26:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-29 00:26:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2023-11-29 00:26:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 95 states have internal predecessors, (104), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-29 00:26:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2023-11-29 00:26:19,692 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 42 [2023-11-29 00:26:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:19,692 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2023-11-29 00:26:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2023-11-29 00:26:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:26:19,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:19,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:26:19,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:26:19,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:26:19,893 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:19,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash -925902198, now seen corresponding path program 3 times [2023-11-29 00:26:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:19,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528806410] [2023-11-29 00:26:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:19,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:19,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:20,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-29 00:26:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:20,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 00:26:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 00:26:20,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:20,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528806410] [2023-11-29 00:26:20,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528806410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:20,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:20,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:26:20,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499046935] [2023-11-29 00:26:20,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:20,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:26:20,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:26:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:20,014 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:26:20,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:20,075 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2023-11-29 00:26:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:26:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-11-29 00:26:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:20,076 INFO L225 Difference]: With dead ends: 76 [2023-11-29 00:26:20,076 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 00:26:20,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:26:20,077 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:20,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 194 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:26:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 00:26:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-29 00:26:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 70 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:26:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2023-11-29 00:26:20,080 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 43 [2023-11-29 00:26:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:20,080 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2023-11-29 00:26:20,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 00:26:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2023-11-29 00:26:20,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 00:26:20,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:20,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2023-11-29 00:26:20,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 00:26:20,081 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:20,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1253297409, now seen corresponding path program 1 times [2023-11-29 00:26:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:20,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354600836] [2023-11-29 00:26:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:21,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354600836] [2023-11-29 00:26:21,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354600836] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:21,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28266730] [2023-11-29 00:26:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:21,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:21,737 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:21,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:26:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:21,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-29 00:26:21,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:21,993 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 [2023-11-29 00:26:22,172 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 [2023-11-29 00:26:22,233 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:26:22,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:26:22,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 00:26:22,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:22,492 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:22,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2023-11-29 00:26:22,516 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 36 treesize of output 15 [2023-11-29 00:26:22,577 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 30 treesize of output 14 [2023-11-29 00:26:22,580 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 15 treesize of output 7 [2023-11-29 00:26:22,584 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 11 treesize of output 3 [2023-11-29 00:26:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:22,837 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 38 treesize of output 27 [2023-11-29 00:26:22,853 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:26:22,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:26:22,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:26:23,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-29 00:26:23,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:26:23,531 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 20 treesize of output 15 [2023-11-29 00:26:23,625 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 19 treesize of output 11 [2023-11-29 00:26:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:23,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:29,208 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2809 (Array Int Int)) (v_ArrVal_2808 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) v_ArrVal_2808) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_2809) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))) is different from false [2023-11-29 00:26:29,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28266730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:29,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:29,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 48 [2023-11-29 00:26:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925005729] [2023-11-29 00:26:29,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:29,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 00:26:29,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 00:26:29,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2727, Unknown=42, NotChecked=106, Total=3080 [2023-11-29 00:26:29,382 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 48 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:31,037 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-11-29 00:26:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:26:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2023-11-29 00:26:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:31,039 INFO L225 Difference]: With dead ends: 76 [2023-11-29 00:26:31,039 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 00:26:31,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=398, Invalid=4676, Unknown=42, NotChecked=140, Total=5256 [2023-11-29 00:26:31,042 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 131 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:31,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 792 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:26:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 00:26:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-29 00:26:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:26:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2023-11-29 00:26:31,045 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 46 [2023-11-29 00:26:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:31,045 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2023-11-29 00:26:31,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2023-11-29 00:26:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:26:31,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:31,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2023-11-29 00:26:31,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:26:31,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:26:31,247 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:31,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash -194509745, now seen corresponding path program 1 times [2023-11-29 00:26:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129034134] [2023-11-29 00:26:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:32,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129034134] [2023-11-29 00:26:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129034134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061671928] [2023-11-29 00:26:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:33,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:33,296 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:33,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:26:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:33,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 00:26:33,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:33,573 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 [2023-11-29 00:26:33,849 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:26:33,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:26:33,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:34,099 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:34,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2023-11-29 00:26:34,201 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 30 treesize of output 14 [2023-11-29 00:26:34,205 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 15 treesize of output 7 [2023-11-29 00:26:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:34,556 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 38 treesize of output 27 [2023-11-29 00:26:34,574 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:26:34,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:26:35,392 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:35,392 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 47 [2023-11-29 00:26:35,557 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 50 treesize of output 33 [2023-11-29 00:26:35,700 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 37 treesize of output 21 [2023-11-29 00:26:35,770 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 25 treesize of output 13 [2023-11-29 00:26:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:35,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:35,792 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3004 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3004) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) 1)) is different from false [2023-11-29 00:26:44,239 INFO L349 Elim1Store]: treesize reduction 5, result has 80.8 percent of original size [2023-11-29 00:26:44,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2023-11-29 00:26:44,383 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3003 (Array Int Int)) (v_ArrVal_3004 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_3003) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3004) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2023-11-29 00:26:44,401 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3003 (Array Int Int)) (v_ArrVal_3004 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_3003) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3004) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0))) is different from false [2023-11-29 00:26:44,574 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3003 (Array Int Int)) (v_ArrVal_3004 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_42| Int) (v_ArrVal_3008 (Array Int Int))) (or (let ((.cse0 (select (select (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_42| v_ArrVal_3008) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_3003) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_42| v_ArrVal_3004) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0)) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_42|) 0)))) is different from false [2023-11-29 00:26:44,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061671928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:44,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:44,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 54 [2023-11-29 00:26:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247166073] [2023-11-29 00:26:44,576 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:44,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-29 00:26:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-29 00:26:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3087, Unknown=49, NotChecked=460, Total=3782 [2023-11-29 00:26:44,578 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 55 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 46 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:51,169 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2023-11-29 00:26:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 00:26:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 46 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2023-11-29 00:26:51,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:51,170 INFO L225 Difference]: With dead ends: 124 [2023-11-29 00:26:51,170 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 00:26:51,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=434, Invalid=5852, Unknown=50, NotChecked=636, Total=6972 [2023-11-29 00:26:51,173 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 327 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:51,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1104 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:26:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 00:26:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 79. [2023-11-29 00:26:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 73 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:26:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2023-11-29 00:26:51,177 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 47 [2023-11-29 00:26:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:51,177 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2023-11-29 00:26:51,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 46 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:26:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2023-11-29 00:26:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:26:51,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:51,178 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2023-11-29 00:26:51,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:26:51,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:26:51,379 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:26:51,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:51,379 INFO L85 PathProgramCache]: Analyzing trace with hash -194509744, now seen corresponding path program 1 times [2023-11-29 00:26:51,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:51,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955315339] [2023-11-29 00:26:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:51,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:26:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:26:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:26:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:26:54,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:54,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955315339] [2023-11-29 00:26:54,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955315339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:54,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185508761] [2023-11-29 00:26:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:54,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:54,051 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:54,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:26:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:54,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-29 00:26:54,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:54,361 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 [2023-11-29 00:26:54,754 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 00:26:54,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 00:26:54,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-29 00:26:54,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:54,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:26:55,072 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:55,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 60 [2023-11-29 00:26:55,077 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 36 treesize of output 15 [2023-11-29 00:26:55,204 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 43 treesize of output 19 [2023-11-29 00:26:55,209 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 15 treesize of output 7 [2023-11-29 00:26:55,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-29 00:26:55,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:26:55,680 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-29 00:26:55,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-29 00:26:55,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:26:55,700 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 51 treesize of output 34 [2023-11-29 00:26:55,722 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:26:55,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:26:55,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-29 00:26:56,597 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:26:56,598 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 59 [2023-11-29 00:26:56,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 15 [2023-11-29 00:26:56,778 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 50 treesize of output 33 [2023-11-29 00:26:56,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:26:56,950 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 48 treesize of output 28 [2023-11-29 00:26:57,107 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 25 treesize of output 13 [2023-11-29 00:26:57,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 00:26:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:26:57,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:26:57,549 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (forall ((v_ArrVal_3202 (Array Int Int)) (v_ArrVal_3203 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3202) .cse0) .cse1) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3203) .cse0) .cse1)))) (forall ((v_ArrVal_3202 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3202) .cse0) .cse1) 4))))) is different from false [2023-11-29 00:26:58,695 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_circular_append_~head#1.base|) |c_ULTIMATE.start_sll_circular_append_~head#1.offset|))) (.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (forall ((v_ArrVal_3200 (Array Int Int)) (v_ArrVal_3202 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_3200) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_3202) .cse1) .cse2) 4))) (forall ((v_ArrVal_3200 (Array Int Int)) (v_ArrVal_3201 (Array Int Int)) (v_ArrVal_3202 (Array Int Int)) (v_ArrVal_3203 (Array Int Int))) (<= (+ 8 (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_3200) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_3202) .cse1) .cse2)) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_3201) |c_ULTIMATE.start_sll_circular_append_#t~ret9#1.base| v_ArrVal_3203) .cse1) .cse2)))))) is different from false [2023-11-29 00:26:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185508761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:26:59,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:26:59,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2023-11-29 00:26:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861224746] [2023-11-29 00:26:59,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:26:59,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 00:26:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 00:26:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3411, Unknown=40, NotChecked=238, Total=3906 [2023-11-29 00:26:59,048 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 54 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 45 states have internal predecessors, (81), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:27:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:03,027 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2023-11-29 00:27:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:27:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 45 states have internal predecessors, (81), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 47 [2023-11-29 00:27:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:03,029 INFO L225 Difference]: With dead ends: 110 [2023-11-29 00:27:03,029 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 00:27:03,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=471, Invalid=6468, Unknown=41, NotChecked=330, Total=7310 [2023-11-29 00:27:03,032 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 361 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:03,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 1096 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:27:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 00:27:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 81. [2023-11-29 00:27:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:27:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-11-29 00:27:03,035 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 47 [2023-11-29 00:27:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:03,035 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-11-29 00:27:03,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 45 states have internal predecessors, (81), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:27:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-11-29 00:27:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 00:27:03,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:03,036 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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, 1, 1, 1] [2023-11-29 00:27:03,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:27:03,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:27:03,237 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:27:03,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:03,238 INFO L85 PathProgramCache]: Analyzing trace with hash -729871238, now seen corresponding path program 1 times [2023-11-29 00:27:03,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:03,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493032890] [2023-11-29 00:27:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:04,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:27:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:04,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:27:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:05,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:27:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:27:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493032890] [2023-11-29 00:27:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493032890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792711610] [2023-11-29 00:27:05,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:05,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:05,322 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:05,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:27:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:05,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 00:27:05,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:05,626 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 [2023-11-29 00:27:05,922 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-29 00:27:05,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-29 00:27:06,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:06,139 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:27:06,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 34 [2023-11-29 00:27:06,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-29 00:27:06,223 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 16 treesize of output 8 [2023-11-29 00:27:06,545 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-29 00:27:06,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-29 00:27:06,560 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 25 treesize of output 20 [2023-11-29 00:27:07,153 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:27:07,153 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 34 [2023-11-29 00:27:07,275 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 25 treesize of output 20 [2023-11-29 00:27:07,386 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 00:27:07,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-29 00:27:07,500 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 28 treesize of output 12 [2023-11-29 00:27:07,571 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 16 treesize of output 8 [2023-11-29 00:27:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:27:07,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:07,590 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3400 (Array Int Int))) (not (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3400) .cse0) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0)))) is different from false [2023-11-29 00:27:07,601 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3399 (Array Int Int)) (v_ArrVal_3400 (Array Int Int))) (not (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base| v_ArrVal_3399) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3400) .cse0) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0)))) is different from false [2023-11-29 00:27:07,621 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3399 (Array Int Int)) (v_ArrVal_3400 (Array Int Int))) (not (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_append_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_append_~last~1#1.offset|) v_ArrVal_3399) |c_ULTIMATE.start_sll_circular_append_~new_last~0#1.base| v_ArrVal_3400) .cse0) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0)))) is different from false [2023-11-29 00:27:08,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792711610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:08,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:27:08,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 54 [2023-11-29 00:27:08,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669614549] [2023-11-29 00:27:08,150 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:27:08,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-29 00:27:08,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-29 00:27:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3107, Unknown=3, NotChecked=342, Total=3660 [2023-11-29 00:27:08,153 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 54 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 45 states have internal predecessors, (82), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:27:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:11,159 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2023-11-29 00:27:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:27:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 45 states have internal predecessors, (82), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2023-11-29 00:27:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:11,160 INFO L225 Difference]: With dead ends: 85 [2023-11-29 00:27:11,161 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 00:27:11,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=485, Invalid=6166, Unknown=3, NotChecked=486, Total=7140 [2023-11-29 00:27:11,162 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 110 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:11,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1228 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:27:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 00:27:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-11-29 00:27:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:27:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-11-29 00:27:11,166 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 50 [2023-11-29 00:27:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:11,166 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-11-29 00:27:11,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 45 states have internal predecessors, (82), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:27:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-11-29 00:27:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 00:27:11,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:11,167 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1, 1] [2023-11-29 00:27:11,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 00:27:11,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:27:11,368 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:27:11,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1119955597, now seen corresponding path program 1 times [2023-11-29 00:27:11,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:11,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657017325] [2023-11-29 00:27:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:11,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:27:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:27:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:27:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:27:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:16,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657017325] [2023-11-29 00:27:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657017325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318901537] [2023-11-29 00:27:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:16,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:16,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:27:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:17,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 153 conjunts are in the unsatisfiable core [2023-11-29 00:27:17,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:17,325 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 [2023-11-29 00:27:17,343 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 [2023-11-29 00:27:17,912 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:27:17,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:27:17,929 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 16 treesize of output 11 [2023-11-29 00:27:18,192 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 16 treesize of output 11 [2023-11-29 00:27:18,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:18,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:18,384 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:27:18,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 83 [2023-11-29 00:27:18,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:18,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2023-11-29 00:27:18,405 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 36 treesize of output 15 [2023-11-29 00:27:18,548 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 45 treesize of output 21 [2023-11-29 00:27:18,554 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 15 treesize of output 7 [2023-11-29 00:27:18,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-29 00:27:18,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 00:27:19,181 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-29 00:27:19,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-29 00:27:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:19,200 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 53 treesize of output 36 [2023-11-29 00:27:19,221 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-11-29 00:27:19,222 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 1 case distinctions, treesize of input 24 treesize of output 31 [2023-11-29 00:27:19,261 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-29 00:27:19,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-29 00:27:20,605 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-29 00:27:20,605 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 82 [2023-11-29 00:27:20,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2023-11-29 00:27:20,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 15 [2023-11-29 00:27:20,870 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 52 treesize of output 35 [2023-11-29 00:27:20,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-29 00:27:20,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-29 00:27:21,079 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 50 treesize of output 30 [2023-11-29 00:27:21,295 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 27 treesize of output 15 [2023-11-29 00:27:21,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-29 00:27:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:27:21,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318901537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:25,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:27:25,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30] total 65 [2023-11-29 00:27:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120514100] [2023-11-29 00:27:25,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:27:25,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 00:27:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 00:27:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=5285, Unknown=12, NotChecked=0, Total=5550 [2023-11-29 00:27:25,164 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 65 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:27:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:27:30,669 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-11-29 00:27:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:27:30,670 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2023-11-29 00:27:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:27:30,671 INFO L225 Difference]: With dead ends: 81 [2023-11-29 00:27:30,671 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 00:27:30,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=587, Invalid=9301, Unknown=12, NotChecked=0, Total=9900 [2023-11-29 00:27:30,673 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 2103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:27:30,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1479 Invalid, 2103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 00:27:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 00:27:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-29 00:27:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-29 00:27:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-11-29 00:27:30,676 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 51 [2023-11-29 00:27:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:27:30,676 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-11-29 00:27:30,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 55 states have internal predecessors, (86), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-29 00:27:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-11-29 00:27:30,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 00:27:30,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:27:30,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1] [2023-11-29 00:27:30,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:27:30,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:27:30,878 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-29 00:27:30,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:27:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash -355880869, now seen corresponding path program 2 times [2023-11-29 00:27:30,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:27:30,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108193032] [2023-11-29 00:27:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:27:30,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:27:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:32,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-29 00:27:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 00:27:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:32,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 00:27:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:27:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 00:27:32,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:32,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108193032] [2023-11-29 00:27:32,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108193032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:32,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400680296] [2023-11-29 00:27:32,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:27:32,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:27:32,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:27:32,647 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:27:32,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07870a1d-4ca3-44b5-aaae-9a23126d0cca/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:27:32,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:27:32,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:27:32,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 141 conjunts are in the unsatisfiable core [2023-11-29 00:27:32,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:27:32,955 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 8 treesize of output 1 [2023-11-29 00:27:32,957 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 [2023-11-29 00:27:33,327 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-29 00:27:33,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 00:27:33,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2023-11-29 00:27:33,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:33,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:27:33,614 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2023-11-29 00:27:33,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 52 [2023-11-29 00:27:33,628 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 36 treesize of output 15 [2023-11-29 00:27:33,731 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-29 00:27:33,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 29 [2023-11-29 00:27:33,737 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 15 treesize of output 7 [2023-11-29 00:27:33,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:27:33,746 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 11 treesize of output 3 [2023-11-29 00:27:34,178 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-29 00:27:34,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-11-29 00:27:34,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 00:27:34,210 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-29 00:27:34,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 53 [2023-11-29 00:27:34,235 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-11-29 00:27:34,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 22 treesize of output 29 [2023-11-29 00:27:34,281 INFO L349 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-11-29 00:27:34,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2023-11-29 00:27:35,375 INFO L349 Elim1Store]: treesize reduction 52, result has 42.9 percent of original size [2023-11-29 00:27:35,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 78 [2023-11-29 00:27:35,398 INFO L349 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2023-11-29 00:27:35,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2023-11-29 00:27:36,187 INFO L349 Elim1Store]: treesize reduction 100, result has 38.3 percent of original size [2023-11-29 00:27:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 175 treesize of output 166 [2023-11-29 00:27:36,239 INFO L349 Elim1Store]: treesize reduction 72, result has 41.5 percent of original size [2023-11-29 00:27:36,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 180 [2023-11-29 00:27:37,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2023-11-29 00:27:37,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:27:37,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 63 [2023-11-29 00:27:41,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:27:41,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 1199 treesize of output 1499 [2023-11-29 00:28:05,294 INFO L349 Elim1Store]: treesize reduction 12, result has 93.8 percent of original size [2023-11-29 00:28:05,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 801 treesize of output 941 [2023-11-29 00:33:55,886 WARN L293 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 1085 DAG size of output: 1085 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)