./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:02:29,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:02:29,906 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:02:29,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:02:29,915 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:02:29,962 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:02:29,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:02:29,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:02:29,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:02:29,967 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:02:29,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:02:29,968 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:02:29,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:02:29,972 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:02:29,972 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:02:29,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:02:29,973 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:02:29,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:02:29,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:02:29,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:02:29,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:02:29,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:02:29,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:02:29,979 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:02:29,983 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:02:29,994 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:02:29,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:02:29,995 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:02:29,995 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:02:29,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:02:29,996 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:02:29,996 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:02:29,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:29,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:02:29,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:02:29,997 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:02:29,998 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:02:29,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:02:29,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:02:29,999 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:02:30,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:02:30,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:02:30,001 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_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2024-10-31 22:02:30,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:02:30,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:02:30,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:02:30,308 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:02:30,308 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:02:30,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i Unable to find full path for "g++" [2024-10-31 22:02:32,403 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:02:32,685 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:02:32,686 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2024-10-31 22:02:32,700 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/data/43a1a00a1/75c8cb2c929f41739502941d359b456d/FLAGf73872cd6 [2024-10-31 22:02:32,997 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/data/43a1a00a1/75c8cb2c929f41739502941d359b456d [2024-10-31 22:02:33,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:02:33,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:02:33,011 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:33,011 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:02:33,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:02:33,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:32" (1/1) ... [2024-10-31 22:02:33,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe66d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33, skipping insertion in model container [2024-10-31 22:02:33,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:02:32" (1/1) ... [2024-10-31 22:02:33,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:02:33,660 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2024-10-31 22:02:33,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:33,699 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:02:33,808 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2024-10-31 22:02:33,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:02:33,873 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:02:33,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33 WrapperNode [2024-10-31 22:02:33,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:02:33,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:33,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:02:33,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:02:33,892 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:33,907 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:33,955 INFO L138 Inliner]: procedures = 127, calls = 53, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 156 [2024-10-31 22:02:33,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:02:33,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:02:33,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:02:33,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:02:33,974 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:33,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:33,987 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,055 INFO L175 MemorySlicer]: Split 35 memory accesses to 3 slices as follows [2, 22, 11]. 63 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 18 writes are split as follows [0, 17, 1]. [2024-10-31 22:02:34,055 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,055 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,071 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,077 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:02:34,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:02:34,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:02:34,079 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:02:34,080 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (1/1) ... [2024-10-31 22:02:34,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:02:34,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:34,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:02:34,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:02:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:02:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:02:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:02:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:02:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:02:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:02:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-10-31 22:02:34,193 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-10-31 22:02:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:02:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:02:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:02:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-31 22:02:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-31 22:02:34,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-31 22:02:34,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-31 22:02:34,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-31 22:02:34,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-31 22:02:34,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:02:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-31 22:02:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-31 22:02:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-31 22:02:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:02:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:02:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:02:34,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:02:34,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:02:34,443 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:02:34,445 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:02:34,798 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-10-31 22:02:34,798 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:02:34,822 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:02:34,823 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:02:34,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:34 BoogieIcfgContainer [2024-10-31 22:02:34,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:02:34,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:02:34,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:02:34,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:02:34,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:02:32" (1/3) ... [2024-10-31 22:02:34,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d37e1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:34, skipping insertion in model container [2024-10-31 22:02:34,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:02:33" (2/3) ... [2024-10-31 22:02:34,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d37e1e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:02:34, skipping insertion in model container [2024-10-31 22:02:34,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:02:34" (3/3) ... [2024-10-31 22:02:34,835 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2024-10-31 22:02:34,859 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:02:34,860 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:02:34,973 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:02:34,983 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@488050fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:02:34,984 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:02:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 32 states have (on average 1.5) internal successors, (48), 33 states have internal predecessors, (48), 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) [2024-10-31 22:02:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:02:35,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:35,023 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:35,024 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:35,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1237252285, now seen corresponding path program 1 times [2024-10-31 22:02:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:35,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883004276] [2024-10-31 22:02:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:35,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:35,510 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:35,571 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:02:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:35,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883004276] [2024-10-31 22:02:35,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883004276] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:35,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:35,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:02:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619049257] [2024-10-31 22:02:35,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:35,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:02:35,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:02:35,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:35,691 INFO L87 Difference]: Start difference. First operand has 38 states, 32 states have (on average 1.5) internal successors, (48), 33 states have internal predecessors, (48), 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, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:35,861 INFO L93 Difference]: Finished difference Result 67 states and 94 transitions. [2024-10-31 22:02:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:02:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-10-31 22:02:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:35,876 INFO L225 Difference]: With dead ends: 67 [2024-10-31 22:02:35,876 INFO L226 Difference]: Without dead ends: 30 [2024-10-31 22:02:35,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:02:35,887 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:35,889 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-31 22:02:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-31 22:02:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2024-10-31 22:02:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-10-31 22:02:35,991 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 25 [2024-10-31 22:02:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:35,999 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-10-31 22:02:36,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-10-31 22:02:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:02:36,003 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:36,004 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:36,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:02:36,006 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:36,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1104710801, now seen corresponding path program 1 times [2024-10-31 22:02:36,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:36,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181822589] [2024-10-31 22:02:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:36,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,394 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-31 22:02:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:02:36,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:36,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181822589] [2024-10-31 22:02:36,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181822589] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:36,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:36,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:02:36,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029468078] [2024-10-31 22:02:36,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:36,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:36,457 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:36,578 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-10-31 22:02:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-10-31 22:02:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:36,581 INFO L225 Difference]: With dead ends: 56 [2024-10-31 22:02:36,582 INFO L226 Difference]: Without dead ends: 35 [2024-10-31 22:02:36,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:36,585 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:36,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 85 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-31 22:02:36,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-10-31 22:02:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2024-10-31 22:02:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-10-31 22:02:36,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 25 [2024-10-31 22:02:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:36,599 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-10-31 22:02:36,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:02:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-10-31 22:02:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:02:36,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:36,601 INFO L215 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] [2024-10-31 22:02:36,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:02:36,602 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:36,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash -313226979, now seen corresponding path program 1 times [2024-10-31 22:02:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:36,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481978962] [2024-10-31 22:02:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:36,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,852 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,872 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:02:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:02:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:36,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481978962] [2024-10-31 22:02:36,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481978962] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:36,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:36,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:02:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275588029] [2024-10-31 22:02:36,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:36,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:02:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:02:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:36,914 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:02:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:37,009 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-10-31 22:02:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:02:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-10-31 22:02:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:37,013 INFO L225 Difference]: With dead ends: 41 [2024-10-31 22:02:37,013 INFO L226 Difference]: Without dead ends: 33 [2024-10-31 22:02:37,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:02:37,016 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:37,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-31 22:02:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-31 22:02:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-10-31 22:02:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-10-31 22:02:37,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2024-10-31 22:02:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:37,031 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-10-31 22:02:37,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:02:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-10-31 22:02:37,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 22:02:37,032 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:37,032 INFO L215 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] [2024-10-31 22:02:37,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:02:37,033 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:37,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash 415590512, now seen corresponding path program 1 times [2024-10-31 22:02:37,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:37,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055313060] [2024-10-31 22:02:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:37,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:40,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:40,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:02:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:40,585 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:02:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:02:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055313060] [2024-10-31 22:02:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055313060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998319816] [2024-10-31 22:02:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:40,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:40,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:40,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:02:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:41,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-10-31 22:02:41,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:41,938 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 [2024-10-31 22:02:42,430 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 [2024-10-31 22:02:42,579 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-31 22:02:42,579 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 [2024-10-31 22:02:42,695 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 [2024-10-31 22:02:42,712 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 [2024-10-31 22:02:42,856 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-31 22:02:42,856 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 57 treesize of output 50 [2024-10-31 22:02:42,873 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 24 treesize of output 11 [2024-10-31 22:02:43,185 INFO L349 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2024-10-31 22:02:43,186 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 2 case distinctions, treesize of input 94 treesize of output 55 [2024-10-31 22:02:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:02:43,215 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 30 treesize of output 27 [2024-10-31 22:02:43,223 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 11 [2024-10-31 22:02:43,638 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2024-10-31 22:02:43,639 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 27 [2024-10-31 22:02:43,651 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 [2024-10-31 22:02:43,658 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 [2024-10-31 22:02:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:02:44,034 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-10-31 22:02:44,035 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 76 treesize of output 53 [2024-10-31 22:02:44,058 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-10-31 22:02:44,059 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 [2024-10-31 22:02:44,092 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 [2024-10-31 22:02:44,521 INFO L349 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2024-10-31 22:02:44,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 29 [2024-10-31 22:02:44,785 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 39 treesize of output 15 [2024-10-31 22:02:44,797 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 25 treesize of output 15 [2024-10-31 22:02:44,926 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 19 treesize of output 11 [2024-10-31 22:02:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:02:45,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:45,269 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int)) (v_ArrVal_602 (Array Int Int)) (v_ArrVal_604 (Array Int Int))) (or (not (= v_ArrVal_602 (store (select |c_#memory_int#1| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset| (select v_ArrVal_602 |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.offset|)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int#1| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_602) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_601) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_604) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ 8 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-10-31 22:02:45,301 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int)) (v_ArrVal_602 (Array Int Int)) (v_ArrVal_604 (Array Int Int))) (or (not (= v_ArrVal_602 (store (select |c_#memory_int#1| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset| (select v_ArrVal_602 |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int#1| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_602) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_601) (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_dll_circular_insert_~last~1#1.offset|) v_ArrVal_604) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ 8 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-10-31 22:02:45,323 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int)) (v_ArrVal_602 (Array Int Int)) (v_ArrVal_604 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (not (= v_ArrVal_602 (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_602 .cse1)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store (store |c_#memory_int#1| .cse0 v_ArrVal_602) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_601) (select (select |c_#memory_$Pointer$#1.base| .cse0) .cse1) v_ArrVal_604) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ 8 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) is different from false [2024-10-31 22:02:45,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998319816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:45,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:02:45,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2024-10-31 22:02:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439429578] [2024-10-31 22:02:45,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:45,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-31 22:02:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:45,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-31 22:02:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2291, Unknown=3, NotChecked=294, Total=2756 [2024-10-31 22:02:45,585 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 47 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 38 states have internal predecessors, (58), 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) [2024-10-31 22:02:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:48,972 INFO L93 Difference]: Finished difference Result 88 states and 120 transitions. [2024-10-31 22:02:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-31 22:02:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 38 states have internal predecessors, (58), 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 36 [2024-10-31 22:02:48,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:48,979 INFO L225 Difference]: With dead ends: 88 [2024-10-31 22:02:48,980 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 22:02:48,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=380, Invalid=5179, Unknown=3, NotChecked=444, Total=6006 [2024-10-31 22:02:48,987 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:48,988 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 374 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-31 22:02:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 22:02:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2024-10-31 22:02:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:02:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-10-31 22:02:49,005 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 36 [2024-10-31 22:02:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:49,007 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-10-31 22:02:49,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 38 states have internal predecessors, (58), 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) [2024-10-31 22:02:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-10-31 22:02:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:02:49,010 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:49,010 INFO L215 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] [2024-10-31 22:02:49,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:02:49,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:49,215 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:49,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1234028387, now seen corresponding path program 1 times [2024-10-31 22:02:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714991197] [2024-10-31 22:02:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,376 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,389 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:02:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:02:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:49,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714991197] [2024-10-31 22:02:49,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714991197] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:49,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:02:49,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:02:49,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219201996] [2024-10-31 22:02:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:49,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:02:49,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:02:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:02:49,414 INFO L87 Difference]: Start difference. First operand 58 states and 76 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, (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) [2024-10-31 22:02:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:49,487 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2024-10-31 22:02:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:49,488 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, (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 37 [2024-10-31 22:02:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:49,489 INFO L225 Difference]: With dead ends: 70 [2024-10-31 22:02:49,489 INFO L226 Difference]: Without dead ends: 59 [2024-10-31 22:02:49,489 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:02:49,490 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:49,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 92 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-31 22:02:49,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2024-10-31 22:02:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:02:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2024-10-31 22:02:49,507 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 37 [2024-10-31 22:02:49,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:49,508 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2024-10-31 22:02:49,508 INFO L472 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, (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) [2024-10-31 22:02:49,508 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2024-10-31 22:02:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-31 22:02:49,509 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:49,509 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:02:49,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:02:49,509 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:49,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1534096253, now seen corresponding path program 2 times [2024-10-31 22:02:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118612408] [2024-10-31 22:02:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,806 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:02:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:02:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-31 22:02:49,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:49,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118612408] [2024-10-31 22:02:49,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118612408] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:49,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831431361] [2024-10-31 22:02:49,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:02:49,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:49,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:49,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:49,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:02:50,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:02:50,076 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:02:50,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:02:50,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:50,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:02:50,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831431361] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:02:50,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:02:50,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2024-10-31 22:02:50,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58789450] [2024-10-31 22:02:50,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:02:50,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:02:50,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:02:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:02:50,122 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-10-31 22:02:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:50,169 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2024-10-31 22:02:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:02:50,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 37 [2024-10-31 22:02:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:50,172 INFO L225 Difference]: With dead ends: 71 [2024-10-31 22:02:50,172 INFO L226 Difference]: Without dead ends: 59 [2024-10-31 22:02:50,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:02:50,173 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:50,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:02:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-31 22:02:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2024-10-31 22:02:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:02:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2024-10-31 22:02:50,197 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 37 [2024-10-31 22:02:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:50,198 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2024-10-31 22:02:50,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-10-31 22:02:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2024-10-31 22:02:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:02:50,202 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:50,202 INFO L215 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] [2024-10-31 22:02:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:02:50,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:50,403 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:50,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1547967990, now seen corresponding path program 1 times [2024-10-31 22:02:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:50,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081482235] [2024-10-31 22:02:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:50,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:02:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,617 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:02:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:50,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081482235] [2024-10-31 22:02:50,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081482235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:50,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743306721] [2024-10-31 22:02:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:50,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:50,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:50,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:50,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:02:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:50,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:02:50,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:50,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:02:51,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743306721] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:51,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:51,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2024-10-31 22:02:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772202571] [2024-10-31 22:02:51,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:51,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:02:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:02:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:02:51,053 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:02:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:02:51,221 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-10-31 22:02:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:02:51,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-10-31 22:02:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:02:51,223 INFO L225 Difference]: With dead ends: 66 [2024-10-31 22:02:51,223 INFO L226 Difference]: Without dead ends: 57 [2024-10-31 22:02:51,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:02:51,224 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:02:51,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 186 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:02:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-31 22:02:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-31 22:02:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 22:02:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-10-31 22:02:51,240 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 38 [2024-10-31 22:02:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:02:51,240 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-10-31 22:02:51,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-31 22:02:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-10-31 22:02:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-31 22:02:51,241 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:02:51,241 INFO L215 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] [2024-10-31 22:02:51,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:02:51,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:51,446 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:02:51,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:02:51,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1605226292, now seen corresponding path program 1 times [2024-10-31 22:02:51,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:02:51,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978124168] [2024-10-31 22:02:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:51,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:02:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:51,754 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-31 22:02:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:51,764 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-31 22:02:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:51,818 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-10-31 22:02:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:02:51,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:02:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978124168] [2024-10-31 22:02:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978124168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:02:51,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918979327] [2024-10-31 22:02:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:02:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:02:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:02:51,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:02:51,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3872efc-f67d-4366-908a-511ccae938e7/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:02:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:02:52,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:02:52,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:02:52,240 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 [2024-10-31 22:02:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:02:52,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:02:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 22:02:52,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918979327] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:02:52,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:02:52,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 16 [2024-10-31 22:02:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695562686] [2024-10-31 22:02:52,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:02:52,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:02:52,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:02:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:02:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:02:52,355 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-31 22:02:56,376 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] [2024-10-31 22:03:00,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-31 22:03:04,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]