./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd --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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:51:11,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:51:11,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 15:51:11,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:51:11,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:51:11,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:51:11,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:51:11,924 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:51:11,924 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:51:11,925 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:51:11,925 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:51:11,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:51:11,926 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:51:11,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:51:11,926 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:51:11,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:51:11,927 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:51:11,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:51:11,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:51:11,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:51:11,930 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:51:11,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:51:11,930 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd 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 -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2024-11-13 15:51:12,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:51:12,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:51:12,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:51:12,295 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:51:12,296 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:51:12,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/list-simple/sll2n_append_equal.i Unable to find full path for "g++" [2024-11-13 15:51:14,111 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:51:14,438 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:51:14,439 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2024-11-13 15:51:14,455 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data/c93b980a0/35b63fd384b6417a91af8db4eff72cc3/FLAGcab036474 [2024-11-13 15:51:14,470 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data/c93b980a0/35b63fd384b6417a91af8db4eff72cc3 [2024-11-13 15:51:14,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:51:14,474 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:51:14,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:51:14,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:51:14,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:51:14,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5e6a59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14, skipping insertion in model container [2024-11-13 15:51:14,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,516 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:51:14,826 WARN L250 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_434fc34b-fce3-4adc-aa04-d15d4730da69/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2024-11-13 15:51:14,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:51:14,838 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:51:14,880 WARN L250 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_434fc34b-fce3-4adc-aa04-d15d4730da69/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2024-11-13 15:51:14,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:51:14,905 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:51:14,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14 WrapperNode [2024-11-13 15:51:14,906 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:51:14,907 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:51:14,907 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:51:14,907 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:51:14,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,942 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2024-11-13 15:51:14,947 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:51:14,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:51:14,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:51:14,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:51:14,958 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,967 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:14,999 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 9, 6]. 53 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-13 15:51:15,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,002 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,032 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:51:15,037 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:51:15,037 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:51:15,037 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:51:15,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (1/1) ... [2024-11-13 15:51:15,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:51:15,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:15,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:51:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:51:15,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:51:15,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:51:15,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 15:51:15,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:51:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:51:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 15:51:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-13 15:51:15,111 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-13 15:51:15,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:51:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:51:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 15:51:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 15:51:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 15:51:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 15:51:15,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:51:15,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:51:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 15:51:15,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:51:15,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:51:15,303 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:51:15,305 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:51:15,571 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-13 15:51:15,572 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:51:15,585 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:51:15,585 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 15:51:15,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:51:15 BoogieIcfgContainer [2024-11-13 15:51:15,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:51:15,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:51:15,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:51:15,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:51:15,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:51:14" (1/3) ... [2024-11-13 15:51:15,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffe14a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:51:15, skipping insertion in model container [2024-11-13 15:51:15,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:51:14" (2/3) ... [2024-11-13 15:51:15,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffe14a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:51:15, skipping insertion in model container [2024-11-13 15:51:15,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:51:15" (3/3) ... [2024-11-13 15:51:15,600 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2024-11-13 15:51:15,617 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:51:15,619 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_append_equal.i that has 2 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 15:51:15,689 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:51:15,701 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;@4a5edd1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:51:15,702 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:51:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) [2024-11-13 15:51:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 15:51:15,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:15,711 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:15,712 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:15,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1109484900, now seen corresponding path program 1 times [2024-11-13 15:51:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:15,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251837190] [2024-11-13 15:51:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:16,069 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 15:51:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:51:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:16,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251837190] [2024-11-13 15:51:16,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251837190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:51:16,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:51:16,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:51:16,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366139950] [2024-11-13 15:51:16,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:51:16,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:51:16,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:51:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:51:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:51:16,154 INFO L87 Difference]: Start difference. First operand has 30 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:51:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:16,240 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2024-11-13 15:51:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:51:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-13 15:51:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:16,248 INFO L225 Difference]: With dead ends: 58 [2024-11-13 15:51:16,248 INFO L226 Difference]: Without dead ends: 27 [2024-11-13 15:51:16,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:51:16,254 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:16,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:51:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-13 15:51:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-13 15:51:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2024-11-13 15:51:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-13 15:51:16,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 17 [2024-11-13 15:51:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:16,292 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-13 15:51:16,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:51:16,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-13 15:51:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 15:51:16,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:16,294 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] [2024-11-13 15:51:16,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:51:16,294 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:16,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -988303972, now seen corresponding path program 1 times [2024-11-13 15:51:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310470164] [2024-11-13 15:51:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:16,558 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:51:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:16,593 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 15:51:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:51:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310470164] [2024-11-13 15:51:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310470164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308519431] [2024-11-13 15:51:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:16,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:16,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:16,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:51:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:16,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 15:51:16,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:51:16,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:51:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308519431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:51:17,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:51:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2024-11-13 15:51:17,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976821146] [2024-11-13 15:51:17,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:51:17,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:51:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:51:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:51:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:51:17,055 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:51:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:17,135 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-11-13 15:51:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:51:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-11-13 15:51:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:17,137 INFO L225 Difference]: With dead ends: 47 [2024-11-13 15:51:17,137 INFO L226 Difference]: Without dead ends: 28 [2024-11-13 15:51:17,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:51:17,138 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 87 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 [2024-11-13 15:51:17,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 87 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:51:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-13 15:51:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-13 15:51:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2024-11-13 15:51:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-13 15:51:17,145 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 25 [2024-11-13 15:51:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:17,145 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-13 15:51:17,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:51:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-13 15:51:17,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 15:51:17,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:17,146 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:17,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:51:17,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:17,351 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:17,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1606533676, now seen corresponding path program 2 times [2024-11-13 15:51:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304508818] [2024-11-13 15:51:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:18,148 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:51:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:18,165 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:51:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:18,177 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:51:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 15:51:18,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:18,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304508818] [2024-11-13 15:51:18,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304508818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:51:18,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:51:18,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-13 15:51:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315031094] [2024-11-13 15:51:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:51:18,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:51:18,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:51:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:51:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:51:18,285 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 15:51:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:18,548 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-11-13 15:51:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 15:51:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-13 15:51:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:18,550 INFO L225 Difference]: With dead ends: 38 [2024-11-13 15:51:18,551 INFO L226 Difference]: Without dead ends: 36 [2024-11-13 15:51:18,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:51:18,553 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:18,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 15:51:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-13 15:51:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2024-11-13 15:51:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2024-11-13 15:51:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-11-13 15:51:18,565 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 33 [2024-11-13 15:51:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:18,566 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-11-13 15:51:18,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 15:51:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-11-13 15:51:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 15:51:18,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:18,569 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:18,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:51:18,569 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:18,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1606535350, now seen corresponding path program 1 times [2024-11-13 15:51:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:18,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476681946] [2024-11-13 15:51:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:19,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:51:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:19,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:51:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:19,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:51:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:51:19,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476681946] [2024-11-13 15:51:19,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476681946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:19,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730475815] [2024-11-13 15:51:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:19,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:19,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:19,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:51:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:19,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 15:51:19,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:20,256 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-11-13 15:51:20,257 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 47 [2024-11-13 15:51:20,328 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 [2024-11-13 15:51:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:51:20,335 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:51:20,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730475815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:51:20,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:51:20,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 26 [2024-11-13 15:51:20,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604950209] [2024-11-13 15:51:20,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:51:20,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 15:51:20,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:51:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 15:51:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2024-11-13 15:51:20,340 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:51:24,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:28,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:32,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:36,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:36,587 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-13 15:51:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 15:51:36,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-13 15:51:36,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:36,589 INFO L225 Difference]: With dead ends: 40 [2024-11-13 15:51:36,589 INFO L226 Difference]: Without dead ends: 37 [2024-11-13 15:51:36,589 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2024-11-13 15:51:36,590 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:36,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 205 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2024-11-13 15:51:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-13 15:51:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-13 15:51:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:51:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-13 15:51:36,603 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 33 [2024-11-13 15:51:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:36,605 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-13 15:51:36,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:51:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-13 15:51:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-13 15:51:36,610 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:36,611 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:36,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:51:36,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:36,811 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:36,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1985568081, now seen corresponding path program 1 times [2024-11-13 15:51:36,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:36,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497941771] [2024-11-13 15:51:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:37,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:51:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:37,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:51:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:37,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:51:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 15:51:37,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497941771] [2024-11-13 15:51:37,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497941771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129797637] [2024-11-13 15:51:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:37,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:37,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:37,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:37,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:51:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:37,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-13 15:51:37,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:37,605 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 [2024-11-13 15:51:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:51:37,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 15:51:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129797637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:51:37,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:51:37,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 13 [2024-11-13 15:51:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026362485] [2024-11-13 15:51:37,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:51:37,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:51:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:51:37,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:51:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:51:37,701 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:51:41,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:45,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:49,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:53,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:51:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:53,961 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-11-13 15:51:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 15:51:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-13 15:51:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:53,963 INFO L225 Difference]: With dead ends: 42 [2024-11-13 15:51:53,963 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 15:51:53,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:51:53,964 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:53,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 209 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 4 Unknown, 0 Unchecked, 16.1s Time] [2024-11-13 15:51:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 15:51:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-13 15:51:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:51:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-13 15:51:53,976 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 35 [2024-11-13 15:51:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:53,977 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-13 15:51:53,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 15:51:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-13 15:51:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 15:51:53,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:53,978 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:54,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 15:51:54,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:54,179 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:54,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash 417785293, now seen corresponding path program 1 times [2024-11-13 15:51:54,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:54,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237376441] [2024-11-13 15:51:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:55,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:51:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:55,178 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:51:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:55,287 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:51:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:51:55,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237376441] [2024-11-13 15:51:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237376441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131857934] [2024-11-13 15:51:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:55,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:55,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:55,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:55,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:51:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:55,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-13 15:51:55,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:55,790 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 [2024-11-13 15:51:55,816 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 [2024-11-13 15:51:55,922 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 23 treesize of output 11 [2024-11-13 15:51:56,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:51:56,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-13 15:51:56,309 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4|) 0) 0)) (exists ((|v_node_create_~temp~0#1.base_26| Int)) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_26| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_26|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_26|) 0)))) is different from true [2024-11-13 15:51:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:51:56,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:51:56,369 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:51:56,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 15:51:56,626 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 27 treesize of output 15 [2024-11-13 15:51:56,705 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 [2024-11-13 15:51:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2024-11-13 15:51:56,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:51:57,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131857934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:57,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:51:57,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-11-13 15:51:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396383898] [2024-11-13 15:51:57,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:51:57,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 15:51:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:51:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 15:51:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=882, Unknown=16, NotChecked=60, Total=1056 [2024-11-13 15:51:57,181 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 15:51:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:51:58,157 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2024-11-13 15:51:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-13 15:51:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-11-13 15:51:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:51:58,158 INFO L225 Difference]: With dead ends: 47 [2024-11-13 15:51:58,159 INFO L226 Difference]: Without dead ends: 45 [2024-11-13 15:51:58,160 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=161, Invalid=1631, Unknown=18, NotChecked=82, Total=1892 [2024-11-13 15:51:58,161 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:51:58,161 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 207 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 413 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2024-11-13 15:51:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-13 15:51:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2024-11-13 15:51:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:51:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2024-11-13 15:51:58,175 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 36 [2024-11-13 15:51:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:51:58,175 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2024-11-13 15:51:58,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-13 15:51:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2024-11-13 15:51:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 15:51:58,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:51:58,177 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:51:58,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:51:58,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 15:51:58,381 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:51:58,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:51:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2059743336, now seen corresponding path program 1 times [2024-11-13 15:51:58,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:51:58,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071892549] [2024-11-13 15:51:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:58,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:51:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:59,173 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:51:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:59,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:51:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:59,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:51:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:51:59,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:51:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071892549] [2024-11-13 15:51:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071892549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:51:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314572577] [2024-11-13 15:51:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:51:59,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:51:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:51:59,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:51:59,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:51:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:51:59,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-13 15:51:59,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:51:59,773 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 [2024-11-13 15:51:59,872 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 23 treesize of output 11 [2024-11-13 15:51:59,953 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 [2024-11-13 15:52:00,070 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:52:00,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 15:52:00,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:52:00,183 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-13 15:52:00,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2024-11-13 15:52:00,203 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 [2024-11-13 15:52:00,479 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 31 treesize of output 15 [2024-11-13 15:52:00,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-13 15:52:00,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:52:00,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-13 15:52:00,738 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-13 15:52:00,931 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:52:00,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 15:52:00,944 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 40 treesize of output 29 [2024-11-13 15:52:00,963 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-13 15:52:00,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2024-11-13 15:52:00,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:52:01,829 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2024-11-13 15:52:01,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 31 [2024-11-13 15:52:01,850 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-13 15:52:01,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 31 [2024-11-13 15:52:01,873 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-11-13 15:52:01,873 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 47 [2024-11-13 15:52:02,114 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 116 treesize of output 72 [2024-11-13 15:52:02,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:52:02,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 49 [2024-11-13 15:52:02,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:52:02,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 43 [2024-11-13 15:52:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:52:02,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:52:03,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:52:03,922 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 126 [2024-11-13 15:52:04,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314572577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:04,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:52:04,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27] total 43 [2024-11-13 15:52:04,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239924417] [2024-11-13 15:52:04,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:52:04,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 15:52:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:52:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 15:52:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2709, Unknown=6, NotChecked=0, Total=2862 [2024-11-13 15:52:04,159 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 43 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 35 states have internal predecessors, (61), 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) [2024-11-13 15:52:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:52:06,195 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-11-13 15:52:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 15:52:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 35 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2024-11-13 15:52:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:52:06,197 INFO L225 Difference]: With dead ends: 46 [2024-11-13 15:52:06,197 INFO L226 Difference]: Without dead ends: 37 [2024-11-13 15:52:06,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=263, Invalid=4423, Unknown=6, NotChecked=0, Total=4692 [2024-11-13 15:52:06,199 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-13 15:52:06,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 489 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-13 15:52:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-13 15:52:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-11-13 15:52:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:52:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-13 15:52:06,207 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 38 [2024-11-13 15:52:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:52:06,208 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-13 15:52:06,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 35 states have internal predecessors, (61), 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) [2024-11-13 15:52:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-13 15:52:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 15:52:06,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:52:06,209 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:52:06,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:52:06,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 15:52:06,409 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:52:06,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:52:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1614142472, now seen corresponding path program 1 times [2024-11-13 15:52:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:52:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188375284] [2024-11-13 15:52:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:52:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:52:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:07,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:52:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:07,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:52:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:07,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:52:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:52:07,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:52:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188375284] [2024-11-13 15:52:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188375284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:07,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15582216] [2024-11-13 15:52:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:52:07,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:52:07,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:52:07,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:52:08,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:52:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:08,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-13 15:52:08,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:52:08,481 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 [2024-11-13 15:52:08,499 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 [2024-11-13 15:52:08,585 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 23 treesize of output 11 [2024-11-13 15:52:08,595 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 [2024-11-13 15:52:08,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2024-11-13 15:52:08,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:52:08,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:52:08,968 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2024-11-13 15:52:08,982 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_41| Int)) (let ((.cse0 (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_41|))) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_41| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_41|))) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_41| .cse0)) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_41|) 0) (= |c_node_create_#in~data#1| (select .cse0 0))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6|) 0) 0))) is different from true [2024-11-13 15:52:09,032 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:52:09,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 15:52:09,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:52:09,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:52:09,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:52:09,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-13 15:52:09,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 15:52:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-13 15:52:09,789 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:52:09,810 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_append_~last~0#1.base| Int) (v_ArrVal_1015 (Array Int Int))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1015) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (let ((.cse0 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (store (select |c_#memory_int#1| |ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 (select v_ArrVal_1015 .cse0))) v_ArrVal_1015)))) is different from false [2024-11-13 15:52:12,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:52:12,588 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2024-11-13 15:52:12,613 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array Int Int)) (v_arrayElimArr_4 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.base_22| Int) (|v_node_create_~temp~0#1.base_46| Int) (v_ArrVal_1022 (Array Int Int))) (let ((.cse0 (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_46| v_arrayElimArr_4))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store .cse0 |v_ULTIMATE.start_sll_append_~last~0#1.base_22| v_ArrVal_1015) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (select v_arrayElimArr_4 0) |c_ULTIMATE.start_sll_append_~data#1|)) (not (= v_ArrVal_1015 (let ((.cse1 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_46| v_ArrVal_1022) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4)) 4))) (store (select .cse0 |v_ULTIMATE.start_sll_append_~last~0#1.base_22|) .cse1 (select v_ArrVal_1015 .cse1))))) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_46|) 0))))) is different from false [2024-11-13 15:52:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15582216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:12,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:52:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2024-11-13 15:52:12,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434770779] [2024-11-13 15:52:12,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:52:12,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 15:52:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:52:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 15:52:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1417, Unknown=17, NotChecked=234, Total=1806 [2024-11-13 15:52:12,619 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 39 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 33 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:52:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:52:13,651 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2024-11-13 15:52:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 15:52:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 33 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2024-11-13 15:52:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:52:13,653 INFO L225 Difference]: With dead ends: 49 [2024-11-13 15:52:13,653 INFO L226 Difference]: Without dead ends: 47 [2024-11-13 15:52:13,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=214, Invalid=2331, Unknown=17, NotChecked=300, Total=2862 [2024-11-13 15:52:13,655 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:52:13,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 226 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2024-11-13 15:52:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-13 15:52:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2024-11-13 15:52:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:52:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-13 15:52:13,663 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 38 [2024-11-13 15:52:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:52:13,663 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-13 15:52:13,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 33 states have internal predecessors, (56), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:52:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-13 15:52:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:52:13,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:52:13,664 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:52:13,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:52:13,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:52:13,865 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:52:13,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:52:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash 707757027, now seen corresponding path program 1 times [2024-11-13 15:52:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:52:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017655632] [2024-11-13 15:52:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:52:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:52:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:16,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:52:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:16,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:52:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:16,534 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:52:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:52:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:52:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017655632] [2024-11-13 15:52:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017655632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527710573] [2024-11-13 15:52:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:52:16,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:52:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:52:16,963 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:52:16,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:52:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:17,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-13 15:52:17,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:52:17,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-13 15:52:17,435 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 [2024-11-13 15:52:17,600 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 [2024-11-13 15:52:17,968 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:52:17,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 15:52:17,996 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 15:52:17,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-11-13 15:52:18,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:52:18,107 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 [2024-11-13 15:52:18,120 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 [2024-11-13 15:52:18,477 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 57 treesize of output 25 [2024-11-13 15:52:18,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2024-11-13 15:52:18,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-13 15:52:18,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:52:18,709 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_50| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_50| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_50|))) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_50| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_50|))) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_50| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_50|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_50|) 0))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7|) 0) 0))) is different from true [2024-11-13 15:52:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:18,742 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 65 treesize of output 42 [2024-11-13 15:52:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:18,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 15:52:18,782 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-13 15:52:18,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 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 [2024-11-13 15:52:18,790 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 [2024-11-13 15:52:19,775 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-13 15:52:19,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 78 [2024-11-13 15:52:19,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2024-11-13 15:52:19,796 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 51 treesize of output 15 [2024-11-13 15:52:19,922 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 62 treesize of output 38 [2024-11-13 15:52:20,020 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 35 treesize of output 19 [2024-11-13 15:52:20,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:52:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:52:20,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:52:20,573 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1185 Int) (v_ArrVal_1187 (Array Int Int)) (|ULTIMATE.start_sll_append_~new_last~0#1.offset| Int)) (let ((.cse1 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4)) (.cse0 (store |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1187)) (.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (+ .cse4 4))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse1 v_ArrVal_1185)) .cse2) .cse3)) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.offset|)) .cse2) .cse3)))) (not (= (store (select |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse1 (select v_ArrVal_1187 .cse1)) v_ArrVal_1187)) (not (= |c_ULTIMATE.start_main_~data~0#1| (select (select .cse0 .cse2) .cse4)))))) is different from false [2024-11-13 15:52:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527710573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:21,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:52:21,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2024-11-13 15:52:21,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955378009] [2024-11-13 15:52:21,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:52:21,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-13 15:52:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:52:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-13 15:52:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3336, Unknown=2, NotChecked=234, Total=3782 [2024-11-13 15:52:21,789 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 53 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 45 states have internal predecessors, (66), 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) [2024-11-13 15:52:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:52:25,355 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-11-13 15:52:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 15:52:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 45 states have internal predecessors, (66), 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 40 [2024-11-13 15:52:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:52:25,357 INFO L225 Difference]: With dead ends: 54 [2024-11-13 15:52:25,359 INFO L226 Difference]: Without dead ends: 51 [2024-11-13 15:52:25,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=420, Invalid=6392, Unknown=2, NotChecked=326, Total=7140 [2024-11-13 15:52:25,361 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-13 15:52:25,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 429 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1179 Invalid, 0 Unknown, 55 Unchecked, 1.4s Time] [2024-11-13 15:52:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-13 15:52:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2024-11-13 15:52:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:52:25,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-13 15:52:25,373 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2024-11-13 15:52:25,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:52:25,373 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-13 15:52:25,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 45 states have internal predecessors, (66), 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) [2024-11-13 15:52:25,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-13 15:52:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:52:25,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:52:25,376 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:52:25,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:52:25,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:52:25,577 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:52:25,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:52:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 262156163, now seen corresponding path program 2 times [2024-11-13 15:52:25,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:52:25,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585542165] [2024-11-13 15:52:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:52:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:52:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:27,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:52:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:27,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:52:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:27,472 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:52:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:52:27,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:52:27,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585542165] [2024-11-13 15:52:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585542165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:27,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588481535] [2024-11-13 15:52:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:52:27,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:52:27,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:52:27,833 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:52:27,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:52:28,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:52:28,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:52:28,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-13 15:52:28,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:52:28,127 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 [2024-11-13 15:52:28,239 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 13 treesize of output 9 [2024-11-13 15:52:28,469 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 [2024-11-13 15:52:28,595 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 15:52:28,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-11-13 15:52:28,609 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 18 treesize of output 13 [2024-11-13 15:52:28,712 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 15 treesize of output 1 [2024-11-13 15:52:28,717 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 [2024-11-13 15:52:28,724 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 33 treesize of output 21 [2024-11-13 15:52:29,066 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2024-11-13 15:52:29,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 20 [2024-11-13 15:52:29,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2024-11-13 15:52:29,081 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 [2024-11-13 15:52:29,299 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_59| Int)) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_59| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_59|))) (= (select |c_old(#valid)| |v_node_create_~temp~0#1.base_59|) 0) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_59| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_59|))) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_59| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_59|))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8| Int)) (and (not (= (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8|) 0) 0)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8|) 0) 0)))) is different from true [2024-11-13 15:52:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:29,382 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-13 15:52:29,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 52 [2024-11-13 15:52:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:29,391 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 34 treesize of output 29 [2024-11-13 15:52:29,418 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-13 15:52:29,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 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 [2024-11-13 15:52:29,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:52:30,318 INFO L349 Elim1Store]: treesize reduction 65, result has 33.7 percent of original size [2024-11-13 15:52:30,318 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 61 treesize of output 59 [2024-11-13 15:52:30,325 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 69 treesize of output 45 [2024-11-13 15:52:30,333 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 49 treesize of output 33 [2024-11-13 15:52:30,339 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 31 treesize of output 15 [2024-11-13 15:52:30,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:52:30,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 56 [2024-11-13 15:52:30,488 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 15:52:30,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:52:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:52:30,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:52:30,700 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_append_~last~0#1.offset| Int) (v_ArrVal_1362 (Array Int Int))) (or (not (= (let ((.cse0 (+ |ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (store (select |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 (select v_ArrVal_1362 .cse0))) v_ArrVal_1362)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1362) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2024-11-13 15:52:30,733 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1362 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_33| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4)))) (or (not (= (let ((.cse1 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_33| 4))) (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1362 .cse1))) v_ArrVal_1362)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1362) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-11-13 15:52:30,826 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1362 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_33| Int)) (let ((.cse0 (let ((.cse2 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse2)) (+ 4 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse2)))))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1362) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (let ((.cse1 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_33| 4))) (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1362 .cse1))) v_ArrVal_1362))))) is different from false [2024-11-13 15:52:30,852 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1362 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_33| Int)) (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse3 (+ (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4))) (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| .cse2) .cse3)) (+ (select (select |c_#memory_$Pointer$#1.offset| .cse2) .cse3) 4))))) (or (not (= v_ArrVal_1362 (let ((.cse1 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_33| 4))) (store (select |c_#memory_int#1| .cse0) .cse1 (select v_ArrVal_1362 .cse1))))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1362) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-11-13 15:52:31,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588481535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:31,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:52:31,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2024-11-13 15:52:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233178604] [2024-11-13 15:52:31,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:52:31,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-13 15:52:31,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:52:31,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-13 15:52:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1935, Unknown=5, NotChecked=460, Total=2550 [2024-11-13 15:52:31,101 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 46 states, 44 states have (on average 1.5) internal successors, (66), 39 states have internal predecessors, (66), 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) [2024-11-13 15:52:34,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:52:34,053 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2024-11-13 15:52:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-13 15:52:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.5) internal successors, (66), 39 states have internal predecessors, (66), 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 40 [2024-11-13 15:52:34,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:52:34,055 INFO L225 Difference]: With dead ends: 91 [2024-11-13 15:52:34,055 INFO L226 Difference]: Without dead ends: 89 [2024-11-13 15:52:34,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=305, Invalid=4266, Unknown=5, NotChecked=680, Total=5256 [2024-11-13 15:52:34,057 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:52:34,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 555 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1191 Invalid, 0 Unknown, 91 Unchecked, 1.3s Time] [2024-11-13 15:52:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-13 15:52:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 48. [2024-11-13 15:52:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 15:52:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2024-11-13 15:52:34,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 40 [2024-11-13 15:52:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:52:34,086 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2024-11-13 15:52:34,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.5) internal successors, (66), 39 states have internal predecessors, (66), 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) [2024-11-13 15:52:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2024-11-13 15:52:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 15:52:34,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:52:34,087 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:52:34,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:52:34,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 15:52:34,287 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:52:34,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:52:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1549705470, now seen corresponding path program 2 times [2024-11-13 15:52:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:52:34,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925279880] [2024-11-13 15:52:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:52:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:52:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:36,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-11-13 15:52:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:36,566 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 15:52:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:36,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 15:52:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:52:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:52:37,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:52:37,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925279880] [2024-11-13 15:52:37,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925279880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:52:37,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993798077] [2024-11-13 15:52:37,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:52:37,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:52:37,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:52:37,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:52:37,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:52:37,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:52:37,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:52:37,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-11-13 15:52:37,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:52:37,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-13 15:52:37,496 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 [2024-11-13 15:52:37,510 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 [2024-11-13 15:52:37,834 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:52:37,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 15:52:37,866 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 15:52:37,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-11-13 15:52:37,887 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 16 treesize of output 11 [2024-11-13 15:52:37,982 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 27 treesize of output 15 [2024-11-13 15:52:37,992 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 22 [2024-11-13 15:52:38,334 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:52:38,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 31 [2024-11-13 15:52:38,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-13 15:52:38,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2024-11-13 15:52:38,557 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 [2024-11-13 15:52:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:38,723 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-13 15:52:38,723 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 64 treesize of output 47 [2024-11-13 15:52:38,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:38,763 INFO L349 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2024-11-13 15:52:38,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 40 [2024-11-13 15:52:38,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:38,796 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-13 15:52:38,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 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 [2024-11-13 15:52:39,831 INFO L349 Elim1Store]: treesize reduction 104, result has 20.6 percent of original size [2024-11-13 15:52:39,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 57 [2024-11-13 15:52:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:52:39,919 INFO L349 Elim1Store]: treesize reduction 180, result has 18.2 percent of original size [2024-11-13 15:52:39,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 61 [2024-11-13 15:52:39,947 INFO L349 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2024-11-13 15:52:39,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2024-11-13 15:52:40,291 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 279 treesize of output 219 [2024-11-13 15:52:42,004 INFO L349 Elim1Store]: treesize reduction 48, result has 86.2 percent of original size [2024-11-13 15:52:42,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 305 treesize of output 466 [2024-11-13 15:52:43,151 INFO L349 Elim1Store]: treesize reduction 80, result has 86.9 percent of original size [2024-11-13 15:52:43,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 161 treesize of output 641 [2024-11-13 15:56:41,194 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-13 15:56:41,195 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-13 15:56:41,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-13 15:56:41,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:56:41,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:41,396 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:290) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:180) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2024-11-13 15:56:41,402 INFO L158 Benchmark]: Toolchain (without parser) took 326928.20ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 93.3MB in the beginning and 937.9MB in the end (delta: -844.6MB). Peak memory consumption was 943.5MB. Max. memory is 16.1GB. [2024-11-13 15:56:41,402 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 142.6MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:56:41,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 430.62ms. Allocated memory is still 117.4MB. Free memory was 93.3MB in the beginning and 75.5MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 15:56:41,402 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.38ms. Allocated memory is still 117.4MB. Free memory was 75.5MB in the beginning and 73.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 15:56:41,403 INFO L158 Benchmark]: Boogie Preprocessor took 89.00ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 71.2MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 15:56:41,403 INFO L158 Benchmark]: RCFGBuilder took 548.89ms. Allocated memory is still 117.4MB. Free memory was 71.2MB in the beginning and 55.7MB in the end (delta: 15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 15:56:41,403 INFO L158 Benchmark]: TraceAbstraction took 325811.77ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 54.9MB in the beginning and 937.9MB in the end (delta: -883.0MB). Peak memory consumption was 901.6MB. Max. memory is 16.1GB. [2024-11-13 15:56:41,404 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 142.6MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 430.62ms. Allocated memory is still 117.4MB. Free memory was 93.3MB in the beginning and 75.5MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.38ms. Allocated memory is still 117.4MB. Free memory was 75.5MB in the beginning and 73.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 89.00ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 71.2MB in the end (delta: 2.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 548.89ms. Allocated memory is still 117.4MB. Free memory was 71.2MB in the beginning and 55.7MB in the end (delta: 15.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 325811.77ms. Allocated memory was 117.4MB in the beginning and 1.5GB in the end (delta: 1.4GB). Free memory was 54.9MB in the beginning and 937.9MB in the end (delta: -883.0MB). Peak memory consumption was 901.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd --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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:56:44,365 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:56:44,533 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-13 15:56:44,548 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:56:44,549 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:56:44,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:56:44,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:56:44,597 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:56:44,598 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:56:44,598 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:56:44,599 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:56:44,599 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:56:44,599 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:56:44,599 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:56:44,600 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 15:56:44,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 15:56:44,601 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:56:44,604 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:56:44,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:56:44,605 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:56:44,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:56:44,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:56:44,605 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:56:44,605 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:56:44,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 15:56:44,606 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-13 15:56:44,606 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 15:56:44,606 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:56:44,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:56:44,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:56:44,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:56:44,608 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd 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 -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2024-11-13 15:56:44,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:56:44,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:56:44,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:56:44,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:56:44,978 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:56:44,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/list-simple/sll2n_append_equal.i Unable to find full path for "g++" [2024-11-13 15:56:46,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:56:47,375 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:56:47,376 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2024-11-13 15:56:47,396 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data/9af7cb9cf/988c55d80cf64a619acd17663d5ccce2/FLAG6b824a7cc [2024-11-13 15:56:47,423 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/data/9af7cb9cf/988c55d80cf64a619acd17663d5ccce2 [2024-11-13 15:56:47,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:56:47,428 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:56:47,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:56:47,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:56:47,436 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:56:47,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:56:47" (1/1) ... [2024-11-13 15:56:47,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6eb948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:47, skipping insertion in model container [2024-11-13 15:56:47,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:56:47" (1/1) ... [2024-11-13 15:56:47,484 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:56:47,930 WARN L250 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_434fc34b-fce3-4adc-aa04-d15d4730da69/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2024-11-13 15:56:47,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:56:47,950 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:56:48,036 WARN L250 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_434fc34b-fce3-4adc-aa04-d15d4730da69/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2024-11-13 15:56:48,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:56:48,085 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:56:48,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48 WrapperNode [2024-11-13 15:56:48,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:56:48,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:56:48,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:56:48,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:56:48,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,165 INFO L138 Inliner]: procedures = 130, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 118 [2024-11-13 15:56:48,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:56:48,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:56:48,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:56:48,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:56:48,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,231 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 9, 6]. 53 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2024-11-13 15:56:48,231 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,263 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:56:48,278 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:56:48,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:56:48,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:56:48,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (1/1) ... [2024-11-13 15:56:48,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:56:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:48,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:56:48,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:56:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-13 15:56:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-13 15:56:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-13 15:56:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-13 15:56:48,373 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-13 15:56:48,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 15:56:48,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-13 15:56:48,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:56:48,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:56:48,558 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:56:48,561 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:56:48,865 INFO L? ?]: Removed 43 outVars from TransFormulas that were not future-live. [2024-11-13 15:56:48,865 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:56:48,879 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:56:48,879 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 15:56:48,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:56:48 BoogieIcfgContainer [2024-11-13 15:56:48,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:56:48,884 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:56:48,885 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:56:48,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:56:48,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:56:47" (1/3) ... [2024-11-13 15:56:48,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae34a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:56:48, skipping insertion in model container [2024-11-13 15:56:48,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:56:48" (2/3) ... [2024-11-13 15:56:48,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae34a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:56:48, skipping insertion in model container [2024-11-13 15:56:48,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:56:48" (3/3) ... [2024-11-13 15:56:48,895 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2024-11-13 15:56:48,913 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:56:48,915 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_append_equal.i that has 2 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 15:56:48,974 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:56:48,993 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;@51805272, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:56:48,993 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 15:56:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) [2024-11-13 15:56:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 15:56:49,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:56:49,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:56:49,013 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:56:49,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:56:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1109484900, now seen corresponding path program 1 times [2024-11-13 15:56:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:56:49,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224167265] [2024-11-13 15:56:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:56:49,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:49,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:49,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:56:49,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:56:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:56:49,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 15:56:49,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:49,490 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 [2024-11-13 15:56:49,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:56:49,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:56:49,783 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 23 treesize of output 15 [2024-11-13 15:56:49,794 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 [2024-11-13 15:56:49,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:56:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:56:49,897 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:56:49,898 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:56:49,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224167265] [2024-11-13 15:56:49,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224167265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:56:49,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:56:49,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-13 15:56:49,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66126527] [2024-11-13 15:56:49,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:56:49,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:56:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:56:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:56:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:56:49,938 INFO L87 Difference]: Start difference. First operand has 30 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 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) Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:56:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:56:50,667 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2024-11-13 15:56:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:56:50,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-13 15:56:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:56:50,676 INFO L225 Difference]: With dead ends: 63 [2024-11-13 15:56:50,677 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 15:56:50,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:56:50,684 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:56:50,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 184 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 15:56:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 15:56:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-11-13 15:56:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2024-11-13 15:56:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-11-13 15:56:50,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2024-11-13 15:56:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:56:50,730 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-11-13 15:56:50,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:56:50,732 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-11-13 15:56:50,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-13 15:56:50,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:56:50,734 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:56:50,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:56:50,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:50,935 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:56:50,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:56:50,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1109483226, now seen corresponding path program 1 times [2024-11-13 15:56:50,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:56:50,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885257720] [2024-11-13 15:56:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:56:50,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:50,940 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:56:50,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:56:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:56:51,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-13 15:56:51,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:51,230 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 15 treesize of output 1 [2024-11-13 15:56:51,286 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 [2024-11-13 15:56:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:56:51,310 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:56:51,310 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:56:51,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885257720] [2024-11-13 15:56:51,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885257720] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:56:51,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:56:51,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-13 15:56:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233738499] [2024-11-13 15:56:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:56:51,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 15:56:51,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:56:51,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 15:56:51,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-13 15:56:51,314 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:56:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:56:51,612 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2024-11-13 15:56:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:56:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-13 15:56:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:56:51,615 INFO L225 Difference]: With dead ends: 35 [2024-11-13 15:56:51,615 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 15:56:51,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:56:51,616 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 15:56:51,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 159 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 15:56:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 15:56:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-11-13 15:56:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2024-11-13 15:56:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-13 15:56:51,624 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2024-11-13 15:56:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:56:51,624 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-13 15:56:51,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:56:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-13 15:56:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 15:56:51,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:56:51,626 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:56:51,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:56:51,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:51,830 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:56:51,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:56:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1063134783, now seen corresponding path program 1 times [2024-11-13 15:56:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:56:51,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007979891] [2024-11-13 15:56:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:56:51,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:51,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:51,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:56:51,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:56:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:56:51,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 15:56:51,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:52,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:56:52,008 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:56:52,008 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:56:52,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007979891] [2024-11-13 15:56:52,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007979891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:56:52,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:56:52,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:56:52,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398576116] [2024-11-13 15:56:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:56:52,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:56:52,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:56:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:56:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:56:52,012 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:56:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:56:52,048 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-11-13 15:56:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:56:52,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-11-13 15:56:52,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:56:52,051 INFO L225 Difference]: With dead ends: 52 [2024-11-13 15:56:52,051 INFO L226 Difference]: Without dead ends: 30 [2024-11-13 15:56:52,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:56:52,052 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:56:52,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 15:56:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-13 15:56:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-11-13 15:56:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2024-11-13 15:56:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-11-13 15:56:52,065 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 19 [2024-11-13 15:56:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:56:52,066 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-11-13 15:56:52,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 15:56:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-11-13 15:56:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 15:56:52,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:56:52,067 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:56:52,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:56:52,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:52,269 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:56:52,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:56:52,270 INFO L85 PathProgramCache]: Analyzing trace with hash -572309385, now seen corresponding path program 1 times [2024-11-13 15:56:52,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:56:52,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006333960] [2024-11-13 15:56:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:56:52,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:52,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:52,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:56:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:56:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:56:52,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:56:52,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:52,707 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 [2024-11-13 15:56:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:56:52,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:56:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 15:56:52,836 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:56:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006333960] [2024-11-13 15:56:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006333960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:56:52,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:56:52,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2024-11-13 15:56:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006154903] [2024-11-13 15:56:52,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:56:52,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:56:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:56:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:56:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:56:52,838 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:56:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:56:53,491 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-13 15:56:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:56:53,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-13 15:56:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:56:53,494 INFO L225 Difference]: With dead ends: 40 [2024-11-13 15:56:53,494 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 15:56:53,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:56:53,496 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:56:53,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 179 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 15:56:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 15:56:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-11-13 15:56:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 15:56:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-13 15:56:53,513 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2024-11-13 15:56:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:56:53,514 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-13 15:56:53,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 15:56:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-13 15:56:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-13 15:56:53,516 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:56:53,516 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, 1, 1, 1] [2024-11-13 15:56:53,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 15:56:53,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:53,717 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:56:53,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:56:53,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1279131909, now seen corresponding path program 1 times [2024-11-13 15:56:53,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:56:53,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599701662] [2024-11-13 15:56:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:56:53,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:53,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:53,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:56:53,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:56:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:56:53,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 15:56:53,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:56:53,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:56:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:56:54,031 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:56:54,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599701662] [2024-11-13 15:56:54,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599701662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:56:54,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:56:54,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2024-11-13 15:56:54,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778603388] [2024-11-13 15:56:54,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:56:54,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 15:56:54,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:56:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 15:56:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-13 15:56:54,034 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:56:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:56:54,184 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2024-11-13 15:56:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:56:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-11-13 15:56:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:56:54,186 INFO L225 Difference]: With dead ends: 58 [2024-11-13 15:56:54,187 INFO L226 Difference]: Without dead ends: 39 [2024-11-13 15:56:54,187 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-13 15:56:54,188 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:56:54,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 142 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 15:56:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-13 15:56:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-13 15:56:54,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 15:56:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2024-11-13 15:56:54,205 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2024-11-13 15:56:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:56:54,207 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2024-11-13 15:56:54,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-13 15:56:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2024-11-13 15:56:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 15:56:54,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:56:54,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:56:54,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:56:54,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:54,408 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:56:54,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:56:54,409 INFO L85 PathProgramCache]: Analyzing trace with hash 417785293, now seen corresponding path program 2 times [2024-11-13 15:56:54,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:56:54,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547144879] [2024-11-13 15:56:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:56:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:56:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:56:54,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:56:54,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:56:54,656 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:56:54,656 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:56:54,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-13 15:56:54,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:54,738 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 7 [2024-11-13 15:56:54,904 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 15 treesize of output 1 [2024-11-13 15:56:55,193 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 12 treesize of output 4 [2024-11-13 15:56:55,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-13 15:56:55,400 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_5| (_ BitVec 32)) (|v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_5| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_5|))) (exists ((|v_node_create_~temp~0#1.base_24| (_ BitVec 32))) (and (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_24| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_24|)) |c_#memory_$Pointer$#1.base|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_24|))))) is different from true [2024-11-13 15:56:55,499 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-13 15:56:55,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-13 15:56:55,512 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 21 treesize of output 16 [2024-11-13 15:56:55,671 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 20 treesize of output 12 [2024-11-13 15:56:55,797 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 [2024-11-13 15:56:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-13 15:56:55,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:56:56,179 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_29| (_ BitVec 32)) (v_ArrVal_207 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_29|))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_29| v_ArrVal_207) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))))))) is different from false [2024-11-13 15:56:56,182 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:56:56,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547144879] [2024-11-13 15:56:56,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547144879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:56:56,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496057666] [2024-11-13 15:56:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:56:56,183 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:56:56,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:56:56,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:56:56,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-11-13 15:56:56,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:56:56,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:56:56,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-13 15:56:56,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:56:56,887 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 7 [2024-11-13 15:56:57,051 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 15 treesize of output 1 [2024-11-13 15:56:57,461 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 12 treesize of output 4 [2024-11-13 15:56:57,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-13 15:56:57,736 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6|) (_ bv0 32)))) (exists ((|v_node_create_~temp~0#1.base_33| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_33|)) (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_33| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_33|)) |c_#memory_$Pointer$#1.base|)))) is different from true [2024-11-13 15:56:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:56:57,797 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 21 treesize of output 16 [2024-11-13 15:56:57,826 INFO L349 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2024-11-13 15:56:57,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2024-11-13 15:56:58,210 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 24 treesize of output 8 [2024-11-13 15:56:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-13 15:56:58,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:56:58,437 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_270 (Array (_ BitVec 32) (_ BitVec 32))) (|v_node_create_~temp~0#1.base_38| (_ BitVec 32))) (or (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_38| v_ArrVal_270) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_38|))))) is different from false [2024-11-13 15:56:58,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [496057666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:56:58,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:56:58,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2024-11-13 15:56:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021145594] [2024-11-13 15:56:58,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:56:58,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 15:56:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:56:58,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 15:56:58,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=901, Unknown=4, NotChecked=252, Total=1260 [2024-11-13 15:56:58,442 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 25 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:57:00,462 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-11-13 15:57:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 15:57:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 25 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2024-11-13 15:57:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:57:00,464 INFO L225 Difference]: With dead ends: 48 [2024-11-13 15:57:00,466 INFO L226 Difference]: Without dead ends: 41 [2024-11-13 15:57:00,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=148, Invalid=1346, Unknown=4, NotChecked=308, Total=1806 [2024-11-13 15:57:00,468 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-13 15:57:00,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 325 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 380 Invalid, 0 Unknown, 78 Unchecked, 1.6s Time] [2024-11-13 15:57:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-13 15:57:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-13 15:57:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 15:57:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-11-13 15:57:00,488 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 36 [2024-11-13 15:57:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:57:00,489 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-11-13 15:57:00,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 25 states have internal predecessors, (46), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-11-13 15:57:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 15:57:00,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:57:00,492 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:57:00,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2024-11-13 15:57:00,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 15:57:00,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:00,897 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:57:00,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:57:00,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1614142472, now seen corresponding path program 1 times [2024-11-13 15:57:00,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:57:00,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511971389] [2024-11-13 15:57:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:00,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:57:00,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:57:00,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:57:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:01,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 15:57:01,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:01,145 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 7 [2024-11-13 15:57:01,355 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 [2024-11-13 15:57:01,470 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:01,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:01,592 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 23 treesize of output 11 [2024-11-13 15:57:01,611 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 15 treesize of output 1 [2024-11-13 15:57:01,969 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 32 treesize of output 16 [2024-11-13 15:57:01,981 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 19 treesize of output 11 [2024-11-13 15:57:02,160 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_42| (_ BitVec 32))) (and (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_42| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_42|)) |c_#memory_$Pointer$#1.base|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_42|)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_42| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_42|))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_7| (_ BitVec 32)) (|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_7|) (_ bv0 32)))) is different from true [2024-11-13 15:57:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:02,244 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 40 treesize of output 29 [2024-11-13 15:57:02,299 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:02,299 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 32 treesize of output 34 [2024-11-13 15:57:02,315 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 [2024-11-13 15:57:02,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-11-13 15:57:02,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:02,932 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 [2024-11-13 15:57:03,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:57:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:57:03,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:03,203 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_336 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_336) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2024-11-13 15:57:03,355 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_336 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) v_ArrVal_336) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2024-11-13 15:57:03,492 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array (_ BitVec 32) (_ BitVec 32))) (|v_node_create_~temp~0#1.base_47| (_ BitVec 32)) (v_ArrVal_342 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_336 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_47| v_ArrVal_342) (select (select (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_47| v_ArrVal_343) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) v_ArrVal_336) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1|) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_47|))))) is different from false [2024-11-13 15:57:03,496 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:57:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511971389] [2024-11-13 15:57:03,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511971389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:57:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385192999] [2024-11-13 15:57:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:57:03,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:57:03,498 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:57:03,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-13 15:57:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:03,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-13 15:57:03,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:03,991 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 7 [2024-11-13 15:57:04,289 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 [2024-11-13 15:57:04,365 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:04,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:04,539 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 15 treesize of output 1 [2024-11-13 15:57:04,546 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 23 treesize of output 11 [2024-11-13 15:57:05,030 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 32 treesize of output 16 [2024-11-13 15:57:05,040 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 19 treesize of output 11 [2024-11-13 15:57:05,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:57:05,342 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8|) (_ bv0 32)) (_ bv0 32))) (exists ((|v_node_create_~temp~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_51|)) (= (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_51| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_51|)) |c_#memory_int#1|) (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_51| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_51|)) |c_#memory_$Pointer$#1.base|)))) is different from true [2024-11-13 15:57:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:05,398 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 40 treesize of output 29 [2024-11-13 15:57:05,439 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:05,439 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 32 treesize of output 34 [2024-11-13 15:57:05,453 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 [2024-11-13 15:57:05,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-11-13 15:57:06,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:06,286 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 [2024-11-13 15:57:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:57:06,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:06,705 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_409 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|)) v_ArrVal_409) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2024-11-13 15:57:06,984 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_56| (_ BitVec 32)) (v_ArrVal_409 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_415 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_416 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_56| v_ArrVal_416) (select (select (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_56| v_ArrVal_415) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) v_ArrVal_409) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_56|) (_ bv0 1))))) is different from false [2024-11-13 15:57:06,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385192999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:57:06,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:57:06,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2024-11-13 15:57:06,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633871019] [2024-11-13 15:57:06,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:57:06,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 15:57:06,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:57:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 15:57:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1563, Unknown=32, NotChecked=602, Total=2352 [2024-11-13 15:57:06,991 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 39 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 32 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:57:10,186 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-11-13 15:57:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 15:57:10,187 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 32 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2024-11-13 15:57:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:57:10,188 INFO L225 Difference]: With dead ends: 54 [2024-11-13 15:57:10,188 INFO L226 Difference]: Without dead ends: 52 [2024-11-13 15:57:10,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=204, Invalid=2143, Unknown=33, NotChecked=700, Total=3080 [2024-11-13 15:57:10,190 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-13 15:57:10,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 280 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 719 Invalid, 0 Unknown, 106 Unchecked, 2.5s Time] [2024-11-13 15:57:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-13 15:57:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-11-13 15:57:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 15:57:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-11-13 15:57:10,206 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 38 [2024-11-13 15:57:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:57:10,207 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-11-13 15:57:10,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 32 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-11-13 15:57:10,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-13 15:57:10,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:57:10,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:57:10,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-13 15:57:10,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:57:10,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:10,609 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:57:10,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:57:10,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1614140798, now seen corresponding path program 1 times [2024-11-13 15:57:10,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:57:10,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192912489] [2024-11-13 15:57:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:10,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:10,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:57:10,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:57:10,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:57:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:10,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 15:57:10,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:10,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-13 15:57:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 15:57:10,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 15:57:11,044 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:57:11,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192912489] [2024-11-13 15:57:11,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192912489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:57:11,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:57:11,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2024-11-13 15:57:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053818605] [2024-11-13 15:57:11,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:57:11,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 15:57:11,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:57:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 15:57:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:57:11,046 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:57:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:57:11,823 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2024-11-13 15:57:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 15:57:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-11-13 15:57:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:57:11,825 INFO L225 Difference]: With dead ends: 51 [2024-11-13 15:57:11,825 INFO L226 Difference]: Without dead ends: 48 [2024-11-13 15:57:11,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:57:11,826 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 15:57:11,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 159 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 15:57:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-13 15:57:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-13 15:57:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 15:57:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-11-13 15:57:11,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 38 [2024-11-13 15:57:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:57:11,843 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-11-13 15:57:11,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 15:57:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-11-13 15:57:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:57:11,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:57:11,844 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:57:11,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:57:12,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:12,045 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:57:12,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:57:12,045 INFO L85 PathProgramCache]: Analyzing trace with hash 707757027, now seen corresponding path program 1 times [2024-11-13 15:57:12,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:57:12,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309827096] [2024-11-13 15:57:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:57:12,049 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:57:12,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 15:57:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:12,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-13 15:57:12,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:12,267 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 7 [2024-11-13 15:57:12,310 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 [2024-11-13 15:57:12,393 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 23 treesize of output 11 [2024-11-13 15:57:12,636 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:12,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:12,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 15:57:12,728 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 15 treesize of output 1 [2024-11-13 15:57:12,737 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 [2024-11-13 15:57:12,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:13,065 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 32 treesize of output 16 [2024-11-13 15:57:13,074 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 19 treesize of output 11 [2024-11-13 15:57:13,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 15:57:13,294 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_9| (_ BitVec 32)) (|v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_9| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_9|))) (exists ((|v_node_create_~temp~0#1.base_72| (_ BitVec 32))) (and (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_72| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_72|)) |c_#memory_$Pointer$#1.base|) (= (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_72| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_72|)) |c_#memory_$Pointer$#1.offset|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_72|)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_72| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_72|)))))) is different from true [2024-11-13 15:57:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:13,365 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 55 treesize of output 38 [2024-11-13 15:57:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:13,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 15:57:13,431 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:13,431 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 32 treesize of output 34 [2024-11-13 15:57:13,445 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 [2024-11-13 15:57:14,118 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-11-13 15:57:14,118 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 119 treesize of output 76 [2024-11-13 15:57:14,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2024-11-13 15:57:14,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 15 [2024-11-13 15:57:14,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2024-11-13 15:57:14,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 15:57:14,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:57:14,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:57:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:57:14,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:15,023 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_545 (_ BitVec 32)) (v_ArrVal_546 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_547 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|) v_ArrVal_545)) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_547) .cse0) .cse1)) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_546) .cse0) .cse1))))) is different from false [2024-11-13 15:57:15,387 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_545 (_ BitVec 32)) (v_ArrVal_546 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_547 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse2 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse1) .cse2)) (.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store |c_#memory_int#1| .cse0 (store (select |c_#memory_int#1| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| .cse1) .cse2)) v_ArrVal_545)) (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_547) .cse3) .cse4)) (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_546) .cse3) .cse4)))))) is different from false [2024-11-13 15:57:15,664 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_77| (_ BitVec 32)) (v_ArrVal_545 (_ BitVec 32)) (v_ArrVal_556 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_557 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_546 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_558 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_547 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (let ((.cse5 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_77| v_ArrVal_557)) (.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (let ((.cse2 (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_77| v_ArrVal_558)) (.cse1 (select (select .cse5 .cse3) .cse4)) (.cse6 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_77| v_ArrVal_556))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) (select (select .cse2 .cse3) .cse4)) v_ArrVal_545))) (select (select (store .cse5 .cse1 v_ArrVal_547) .cse6) .cse7)) (select (select (store .cse2 .cse1 v_ArrVal_546) .cse6) .cse7)))) |c_ULTIMATE.start_main_~data~0#1|) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_77|))))) is different from false [2024-11-13 15:57:15,680 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:57:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309827096] [2024-11-13 15:57:15,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309827096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:57:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [584498911] [2024-11-13 15:57:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:57:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:57:15,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:57:15,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-13 15:57:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:16,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 15:57:16,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:16,285 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 7 [2024-11-13 15:57:16,315 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 [2024-11-13 15:57:16,466 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 23 treesize of output 11 [2024-11-13 15:57:16,711 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:57:16,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 15:57:16,754 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:16,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:16,952 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 [2024-11-13 15:57:16,967 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 15 treesize of output 1 [2024-11-13 15:57:16,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:17,582 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 47 treesize of output 23 [2024-11-13 15:57:17,590 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 [2024-11-13 15:57:17,599 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 19 treesize of output 11 [2024-11-13 15:57:17,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:57:17,939 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_81| (_ BitVec 32))) (and (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_81| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_81|))) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_81|)) (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_81| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_81|)) |c_#memory_$Pointer$#1.base|) (= (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_81| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_81|)) |c_#memory_$Pointer$#1.offset|))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_10| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_10|) (_ bv0 32))))) is different from true [2024-11-13 15:57:18,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:18,029 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 55 treesize of output 38 [2024-11-13 15:57:18,070 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:18,070 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 32 treesize of output 34 [2024-11-13 15:57:18,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2024-11-13 15:57:18,105 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 [2024-11-13 15:57:19,016 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-11-13 15:57:19,016 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 119 treesize of output 76 [2024-11-13 15:57:19,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 15 [2024-11-13 15:57:19,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2024-11-13 15:57:19,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2024-11-13 15:57:19,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-13 15:57:19,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 15:57:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:57:19,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:20,776 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_643 (Array (_ BitVec 32) (_ BitVec 32))) (|v_node_create_~temp~0#1.base_87| (_ BitVec 32)) (v_ArrVal_545 (_ BitVec 32)) (v_ArrVal_644 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_546 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_547 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse5 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_87| v_ArrVal_642)) (.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (let ((.cse2 (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_87| v_ArrVal_643)) (.cse1 (select (select .cse5 .cse3) .cse4)) (.cse6 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (let ((.cse0 (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_87| v_ArrVal_644))) (store .cse0 .cse1 (store (select .cse0 .cse1) (bvadd (_ bv4 32) (select (select .cse2 .cse3) .cse4)) v_ArrVal_545))) (select (select (store .cse5 .cse1 v_ArrVal_547) .cse6) .cse7)) (select (select (store .cse2 .cse1 v_ArrVal_546) .cse6) .cse7))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_87|))))) is different from false [2024-11-13 15:57:20,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [584498911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:57:20,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:57:20,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2024-11-13 15:57:20,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075053091] [2024-11-13 15:57:20,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:57:20,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 15:57:20,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:57:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 15:57:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2001, Unknown=25, NotChecked=570, Total=2756 [2024-11-13 15:57:20,792 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 43 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 36 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:57:25,627 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-13 15:57:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 15:57:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 36 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2024-11-13 15:57:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:57:25,629 INFO L225 Difference]: With dead ends: 57 [2024-11-13 15:57:25,629 INFO L226 Difference]: Without dead ends: 55 [2024-11-13 15:57:25,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=250, Invalid=3287, Unknown=27, NotChecked=726, Total=4290 [2024-11-13 15:57:25,631 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-13 15:57:25,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 314 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 919 Invalid, 0 Unknown, 110 Unchecked, 3.1s Time] [2024-11-13 15:57:25,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-13 15:57:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2024-11-13 15:57:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 15:57:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-11-13 15:57:25,650 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 40 [2024-11-13 15:57:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:57:25,650 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-11-13 15:57:25,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 36 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-11-13 15:57:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:57:25,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:57:25,652 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:57:25,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 15:57:25,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-11-13 15:57:26,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 15:57:26,054 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:57:26,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:57:26,054 INFO L85 PathProgramCache]: Analyzing trace with hash 707755353, now seen corresponding path program 1 times [2024-11-13 15:57:26,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:57:26,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373180987] [2024-11-13 15:57:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:26,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:26,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:57:26,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:57:26,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 15:57:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:26,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-13 15:57:26,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:26,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-13 15:57:26,450 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:26,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:26,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:57:26,780 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 44 treesize of output 20 [2024-11-13 15:57:26,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:57:26,965 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_11| (_ BitVec 32)) (|v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_11| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_11|) |v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_11|))) (exists ((|v_node_create_~temp~0#1.base_90| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_90|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_90| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_90|)))))) is different from true [2024-11-13 15:57:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:27,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2024-11-13 15:57:27,057 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:27,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-11-13 15:57:27,582 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-11-13 15:57:27,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 40 [2024-11-13 15:57:27,689 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 36 treesize of output 20 [2024-11-13 15:57:27,763 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 24 treesize of output 12 [2024-11-13 15:57:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:57:27,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:28,028 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_706 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_706) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-11-13 15:57:28,057 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_706 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|)) v_ArrVal_706) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2024-11-13 15:57:28,291 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_709 (Array (_ BitVec 32) (_ BitVec 32))) (|v_node_create_~temp~0#1.base_95| (_ BitVec 32)) (v_ArrVal_706 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_95|))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_95| v_ArrVal_709))) (store .cse0 (select (select .cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) v_ArrVal_706)) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (_ bv0 32))))) is different from false [2024-11-13 15:57:28,295 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:57:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373180987] [2024-11-13 15:57:28,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373180987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:57:28,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549760033] [2024-11-13 15:57:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:57:28,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:57:28,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:57:28,299 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:57:28,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-13 15:57:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:57:28,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 15:57:28,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:28,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-13 15:57:29,111 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:29,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:29,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 15:57:29,695 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 44 treesize of output 20 [2024-11-13 15:57:29,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:57:29,950 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_12| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_12|) (_ bv0 32)) (_ bv0 32))) (exists ((|v_node_create_~temp~0#1.base_99| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_99|)) (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_99| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_99|)) |c_#memory_$Pointer$#1.base|)))) is different from true [2024-11-13 15:57:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:29,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2024-11-13 15:57:30,036 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:30,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-11-13 15:57:30,645 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2024-11-13 15:57:30,645 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 53 treesize of output 40 [2024-11-13 15:57:30,810 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 36 treesize of output 20 [2024-11-13 15:57:30,829 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 24 treesize of output 12 [2024-11-13 15:57:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:57:30,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:31,390 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_774 (Array (_ BitVec 32) (_ BitVec 32))) (|v_node_create_~temp~0#1.base_104| (_ BitVec 32)) (v_ArrVal_706 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_104|))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_104| v_ArrVal_774))) (store .cse0 (select (select .cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) v_ArrVal_706)) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (_ bv0 32))))) is different from false [2024-11-13 15:57:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549760033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:57:31,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:57:31,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 37 [2024-11-13 15:57:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481485243] [2024-11-13 15:57:31,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:57:31,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 15:57:31,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:57:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 15:57:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1397, Unknown=37, NotChecked=486, Total=2070 [2024-11-13 15:57:31,395 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 30 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 15:57:34,212 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2024-11-13 15:57:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 15:57:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 30 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2024-11-13 15:57:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 15:57:34,214 INFO L225 Difference]: With dead ends: 58 [2024-11-13 15:57:34,214 INFO L226 Difference]: Without dead ends: 55 [2024-11-13 15:57:34,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=208, Invalid=2128, Unknown=40, NotChecked=594, Total=2970 [2024-11-13 15:57:34,215 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-13 15:57:34,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 338 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 607 Invalid, 0 Unknown, 106 Unchecked, 2.0s Time] [2024-11-13 15:57:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-13 15:57:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2024-11-13 15:57:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-13 15:57:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-11-13 15:57:34,236 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 40 [2024-11-13 15:57:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 15:57:34,237 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-11-13 15:57:34,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 30 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:57:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-11-13 15:57:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 15:57:34,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 15:57:34,238 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:57:34,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2024-11-13 15:57:34,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 15:57:34,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:34,639 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 15:57:34,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:57:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 262156163, now seen corresponding path program 2 times [2024-11-13 15:57:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 15:57:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514703384] [2024-11-13 15:57:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:57:34,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:57:34,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:57:34,641 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:57:34,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 15:57:34,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:57:34,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:57:34,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-13 15:57:34,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:57:34,880 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 7 [2024-11-13 15:57:34,987 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 [2024-11-13 15:57:35,162 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 [2024-11-13 15:57:35,272 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:57:35,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 15:57:35,312 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:57:35,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:57:35,408 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 [2024-11-13 15:57:35,425 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 27 treesize of output 15 [2024-11-13 15:57:35,439 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 [2024-11-13 15:57:35,787 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:57:35,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-11-13 15:57:35,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2024-11-13 15:57:35,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:57:39,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:39,039 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-13 15:57:39,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 34 [2024-11-13 15:57:39,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:57:39,099 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:57:39,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-11-13 15:57:39,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:39,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:45,936 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 [2024-11-13 15:57:47,136 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:57:47,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-11-13 15:57:48,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:57:52,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:57:52,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2024-11-13 15:57:53,012 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 15:57:53,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:57:56,646 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 15 treesize of output 7 [2024-11-13 15:57:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:57:56,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:57:57,749 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|)) v_ArrVal_846) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2024-11-13 15:57:57,783 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int#1| (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|))) (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0)))) v_ArrVal_846) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2024-11-13 15:58:00,503 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_113| (_ BitVec 32)) (v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_854 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_855 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_856 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_113|))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_113| v_ArrVal_854) (let ((.cse1 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse2 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_113| v_ArrVal_856))) (select .cse0 (select (select .cse0 .cse1) .cse2))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_113| v_ArrVal_855) .cse1) .cse2)))) v_ArrVal_846) (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) is different from false [2024-11-13 15:58:00,511 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 15:58:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514703384] [2024-11-13 15:58:00,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514703384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:58:00,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1077308252] [2024-11-13 15:58:00,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:58:00,511 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 15:58:00,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 15:58:00,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 15:58:00,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2024-11-13 15:58:01,085 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:58:01,086 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:58:01,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-13 15:58:01,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:58:01,387 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 7 [2024-11-13 15:58:01,777 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 [2024-11-13 15:58:02,381 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 [2024-11-13 15:58:02,571 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:58:02,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 15:58:02,690 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 15:58:02,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 15:58:03,770 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 [2024-11-13 15:58:03,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-13 15:58:03,840 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 27 treesize of output 15 [2024-11-13 15:58:09,391 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:58:09,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-11-13 15:58:09,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 15:58:09,423 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 [2024-11-13 15:58:09,433 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 [2024-11-13 15:58:10,510 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_14| (_ BitVec 32))) (and (not (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_14|) (_ bv0 32)))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_14|) (_ bv0 32))))) (exists ((|v_node_create_~temp~0#1.base_117| (_ BitVec 32))) (and (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_117| (store (store (select |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_117|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) (select (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_117|) (_ bv0 32)))) |c_#memory_$Pointer$#1.base|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_117|)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_117| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_117|))) (= (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_117| (store (store (select |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_117|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) (select (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_117|) (_ bv0 32)))) |c_#memory_$Pointer$#1.offset|)))) is different from true [2024-11-13 15:58:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:58:10,783 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 15:58:10,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2024-11-13 15:58:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:58:10,950 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 15:58:10,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2024-11-13 15:58:10,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:58:11,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2024-11-13 15:58:30,932 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2024-11-13 15:58:30,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 22 [2024-11-13 15:58:31,006 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 15:58:31,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-13 15:58:35,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-13 15:58:40,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:58:40,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2024-11-13 15:58:40,430 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-13 15:58:40,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 15:58:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 15:58:41,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:58:48,904 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (and (forall ((|v_node_create_~temp~0#1.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_945 (_ BitVec 32)) (v_ArrVal_943 (_ BitVec 32)) (v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_944 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_122| (store (store (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_122|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_ArrVal_945))) (.cse0 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_122| (store (store (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_122|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_ArrVal_943)))) (let ((.cse1 (select (select .cse0 .cse6) .cse7)) (.cse2 (bvadd (_ bv4 32) (select (select .cse5 .cse6) .cse7)))) (or (= (select (select (store (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_122| v_ArrVal_944) (select (select .cse0 .cse1) .cse2) v_ArrVal_846) .cse3) .cse4) |c_ULTIMATE.start_main_~data~0#1|) (= (select (select .cse5 .cse1) .cse2) (_ bv0 32)))))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_122|))))) (forall ((|v_node_create_~temp~0#1.base_122| (_ BitVec 32))) (or (forall ((v_ArrVal_945 (_ BitVec 32)) (v_ArrVal_943 (_ BitVec 32)) (v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_944 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (select (let ((.cse9 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_122| (store (store (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_122|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_ArrVal_943)))) (select .cse9 (select (select .cse9 .cse6) .cse7))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_122| (store (store (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_122|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_ArrVal_945)) .cse6) .cse7))))) (or (= (_ bv0 32) .cse8) (= (select (select (store (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_122| v_ArrVal_944) .cse8 v_ArrVal_846) .cse3) .cse4) |c_ULTIMATE.start_main_~data~0#1|)))) (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_122|))))))) is different from false [2024-11-13 15:58:48,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1077308252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:58:48,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:58:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 42 [2024-11-13 15:58:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365775525] [2024-11-13 15:58:48,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 15:58:48,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 15:58:48,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 15:58:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 15:58:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2136, Unknown=44, NotChecked=490, Total=2862 [2024-11-13 15:58:48,929 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 42 states, 40 states have (on average 1.45) internal successors, (58), 35 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 15:58:50,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:00,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:08,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:13,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:17,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:21,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:25,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:29,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:34,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:38,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:42,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:46,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:55,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 15:59:59,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:03,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:12,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:16,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:18,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:22,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:26,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:30,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:34,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:39,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:41,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:45,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:49,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:53,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:00:57,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:01:01,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:01:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:01:01,482 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2024-11-13 16:01:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 16:01:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.45) internal successors, (58), 35 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2024-11-13 16:01:01,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:01:01,501 INFO L225 Difference]: With dead ends: 86 [2024-11-13 16:01:01,501 INFO L226 Difference]: Without dead ends: 84 [2024-11-13 16:01:01,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 80.6s TimeCoverageRelationStatistics Valid=236, Invalid=2707, Unknown=47, NotChecked=550, Total=3540 [2024-11-13 16:01:01,503 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 16 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 8 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 117.9s IncrementalHoareTripleChecker+Time [2024-11-13 16:01:01,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 386 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 951 Invalid, 27 Unknown, 71 Unchecked, 117.9s Time] [2024-11-13 16:01:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-13 16:01:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2024-11-13 16:01:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:01:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2024-11-13 16:01:01,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 40 [2024-11-13 16:01:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:01:01,536 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2024-11-13 16:01:01,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.45) internal successors, (58), 35 states have internal predecessors, (58), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:01:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2024-11-13 16:01:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:01:01,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:01:01,537 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:01:01,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2024-11-13 16:01:01,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 16:01:01,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:01:01,938 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:01:01,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:01:01,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1549705470, now seen corresponding path program 2 times [2024-11-13 16:01:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 16:01:01,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980301796] [2024-11-13 16:01:01,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:01:01,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:01:01,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:01:01,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:01:01,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 16:01:02,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:01:02,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:01:02,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-13 16:01:02,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:01:02,314 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 7 [2024-11-13 16:01:03,330 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 16:01:03,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 16:01:03,550 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 15 treesize of output 1 [2024-11-13 16:01:03,565 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 [2024-11-13 16:01:04,558 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 32 treesize of output 16 [2024-11-13 16:01:04,577 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 19 treesize of output 11 [2024-11-13 16:01:04,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-13 16:01:05,179 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 [2024-11-13 16:01:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:01:05,597 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 40 treesize of output 29 [2024-11-13 16:01:05,756 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 16:01:05,756 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 32 treesize of output 34 [2024-11-13 16:01:05,838 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 [2024-11-13 16:01:08,472 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-11-13 16:01:08,472 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 194 treesize of output 92 [2024-11-13 16:01:08,514 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 56 treesize of output 35 [2024-11-13 16:01:08,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:01:08,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 15 [2024-11-13 16:01:09,104 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 94 treesize of output 62 [2024-11-13 16:01:10,658 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:01:10,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 37 [2024-11-13 16:01:10,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-11-13 16:01:11,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 16:01:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:01:11,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:01:13,401 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|))) (let ((.cse3 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse6 |c_ULTIMATE.start_sll_append_~new_last~0#1.offset|))) (.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse6 |c_ULTIMATE.start_sll_append_~new_last~0#1.base|))) (.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (let ((.cse1 (select (select .cse0 .cse4) .cse5)) (.cse2 (bvadd (_ bv4 32) (select (select .cse3 .cse4) .cse5)))) (select (select (store |c_#memory_int#1| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1015) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2024-11-13 16:01:13,640 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse8 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse8)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse8)))) (let ((.cse4 (store |c_#memory_$Pointer$#1.offset| .cse0 (store (select |c_#memory_$Pointer$#1.offset| .cse0) .cse7 |c_ULTIMATE.start_sll_append_~new_last~0#1.offset|))) (.cse1 (store |c_#memory_$Pointer$#1.base| .cse0 (store (select |c_#memory_$Pointer$#1.base| .cse0) .cse7 |c_ULTIMATE.start_sll_append_~new_last~0#1.base|))) (.cse5 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (let ((.cse2 (select (select .cse1 .cse5) .cse6)) (.cse3 (bvadd (_ bv4 32) (select (select .cse4 .cse5) .cse6)))) (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1015) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3)))))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2024-11-13 16:01:13,822 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse8 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse9 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse8) .cse9)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| .cse8) .cse9)))) (let ((.cse4 (store |c_#memory_$Pointer$#1.offset| .cse0 (store (select |c_#memory_$Pointer$#1.offset| .cse0) .cse7 |c_ULTIMATE.start_sll_append_~new_last~0#1.offset|))) (.cse1 (store |c_#memory_$Pointer$#1.base| .cse0 (store (select |c_#memory_$Pointer$#1.base| .cse0) .cse7 |c_ULTIMATE.start_sll_append_~new_last~0#1.base|))) (.cse5 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (let ((.cse2 (select (select .cse1 .cse5) .cse6)) (.cse3 (bvadd (_ bv4 32) (select (select .cse4 .cse5) .cse6)))) (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1015) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3)))))))) is different from false [2024-11-13 16:01:13,928 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1015 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse8 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse9 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| .cse8) .cse9)) (.cse7 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| .cse8) .cse9)))) (let ((.cse4 (store |c_#memory_$Pointer$#1.offset| .cse0 (store (select |c_#memory_$Pointer$#1.offset| .cse0) .cse7 |c_ULTIMATE.start_sll_append_#t~ret7#1.offset|))) (.cse1 (store |c_#memory_$Pointer$#1.base| .cse0 (store (select |c_#memory_$Pointer$#1.base| .cse0) .cse7 |c_ULTIMATE.start_sll_append_#t~ret7#1.base|))) (.cse5 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (let ((.cse2 (select (select .cse1 .cse5) .cse6)) (.cse3 (bvadd (select (select .cse4 .cse5) .cse6) (_ bv4 32)))) (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1015) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3)))))) |c_ULTIMATE.start_main_~data~0#1|)) is different from false [2024-11-13 16:01:14,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:01:14,514 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 505 treesize of output 506 [2024-11-13 16:01:14,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:01:14,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1239 treesize of output 1242 [2024-11-13 16:01:14,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 496 treesize of output 259 [2024-11-13 16:01:39,214 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 16:01:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980301796] [2024-11-13 16:01:39,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980301796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:01:39,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389427748] [2024-11-13 16:01:39,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:01:39,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 16:01:39,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 16:01:39,217 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 16:01:39,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-13 16:01:39,831 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:01:39,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:01:39,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-13 16:01:39,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:01:40,714 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 7 [2024-11-13 16:01:43,502 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 16:01:43,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 16:01:44,234 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 15 treesize of output 1 [2024-11-13 16:01:44,250 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 [2024-11-13 16:01:46,510 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 32 treesize of output 16 [2024-11-13 16:01:46,528 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 [2024-11-13 16:01:46,544 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 19 treesize of output 11 [2024-11-13 16:01:49,013 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 [2024-11-13 16:01:49,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:01:49,965 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 40 treesize of output 29 [2024-11-13 16:01:50,121 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 16:01:50,121 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 32 treesize of output 34 [2024-11-13 16:01:50,208 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 [2024-11-13 16:01:55,551 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-11-13 16:01:55,552 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 185 treesize of output 91 [2024-11-13 16:01:55,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2024-11-13 16:01:55,692 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 59 treesize of output 23 [2024-11-13 16:01:57,092 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 97 treesize of output 65 [2024-11-13 16:02:00,439 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 16:02:00,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2024-11-13 16:02:00,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 16:02:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:02:03,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:02:15,578 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 3504 treesize of output 3030 [2024-11-13 16:02:34,860 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (.cse7 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse8 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (and (or (forall ((|v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|)))) (= |c_ULTIMATE.start_main_~data~0#1| |c_ULTIMATE.start_sll_append_~data#1|)) (forall ((|v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| (_ BitVec 32))) (or (forall ((v_ArrVal_1101 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1102 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (let ((.cse6 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| v_ArrVal_1101)) (.cse1 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| v_ArrVal_1102))) (let ((.cse2 (select (select .cse1 .cse7) .cse8)) (.cse3 (bvadd (_ bv4 32) (select (select .cse6 .cse7) .cse8)))) (let ((.cse0 (store .cse6 .cse2 (store (select .cse6 .cse2) .cse3 (_ bv0 32))))) (select (select .cse0 (select (select (store .cse1 .cse2 (store (select .cse1 .cse2) .cse3 |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|)) .cse4) .cse5)) (bvadd (_ bv4 32) (select (select .cse0 .cse4) .cse5)))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|))))) (forall ((|v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|))) (forall ((v_ArrVal_1101 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1102 (Array (_ BitVec 32) (_ BitVec 32)))) (= |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| (let ((.cse13 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| v_ArrVal_1101)) (.cse10 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| v_ArrVal_1102))) (let ((.cse11 (select (select .cse10 .cse7) .cse8)) (.cse12 (bvadd (_ bv4 32) (select (select .cse13 .cse7) .cse8)))) (select (let ((.cse9 (store .cse10 .cse11 (store (select .cse10 .cse11) .cse12 |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|)))) (select .cse9 (select (select .cse9 .cse4) .cse5))) (bvadd (_ bv4 32) (select (select (store .cse13 .cse11 (store (select .cse13 .cse11) .cse12 (_ bv0 32))) .cse4) .cse5))))))))) (forall ((|v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|))) (forall ((v_ArrVal_1101 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1102 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse17 (store |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| v_ArrVal_1101))) (or (not (let ((.cse16 (store |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58| v_ArrVal_1102))) (let ((.cse14 (select (select .cse16 .cse7) .cse8))) (= .cse14 (select (let ((.cse15 (store .cse16 .cse14 (store (select .cse16 .cse14) (_ bv0 32) |v_ULTIMATE.start_sll_append_#t~ret7#1.base_58|)))) (select .cse15 (select (select .cse15 .cse4) .cse5))) (bvadd (_ bv4 32) (select (select (store .cse17 .cse14 (store (select .cse17 .cse14) (_ bv0 32) (_ bv0 32))) .cse4) .cse5))))))) (not (= (bvadd (_ bv4 32) (select (select .cse17 .cse7) .cse8)) (_ bv0 32)))))))))) is different from false [2024-11-13 16:02:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389427748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:02:35,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:02:35,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 48 [2024-11-13 16:02:35,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169012699] [2024-11-13 16:02:35,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:02:35,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-13 16:02:35,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 16:02:35,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-13 16:02:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3016, Unknown=13, NotChecked=570, Total=3782 [2024-11-13 16:02:35,366 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 48 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 39 states have internal predecessors, (62), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:02:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:02:52,500 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-11-13 16:02:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 16:02:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 39 states have internal predecessors, (62), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-11-13 16:02:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:02:52,502 INFO L225 Difference]: With dead ends: 81 [2024-11-13 16:02:52,502 INFO L226 Difference]: Without dead ends: 79 [2024-11-13 16:02:52,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=264, Invalid=4165, Unknown=13, NotChecked=670, Total=5112 [2024-11-13 16:02:52,504 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:02:52,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 368 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2024-11-13 16:02:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-13 16:02:52,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2024-11-13 16:02:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:02:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2024-11-13 16:02:52,538 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 42 [2024-11-13 16:02:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:02:52,538 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2024-11-13 16:02:52,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 39 states have internal predecessors, (62), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:02:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2024-11-13 16:02:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:02:52,539 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:02:52,539 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:02:52,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-13 16:02:52,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 16:02:52,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:52,941 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:02:52,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:02:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1549703796, now seen corresponding path program 2 times [2024-11-13 16:02:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 16:02:52,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256929868] [2024-11-13 16:02:52,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:02:52,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:02:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:02:52,944 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:02:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 16:02:53,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:02:53,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:02:53,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 16:02:53,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:02:57,218 INFO L349 Elim1Store]: treesize reduction 69, result has 32.4 percent of original size [2024-11-13 16:02:57,219 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 170 treesize of output 123 [2024-11-13 16:02:57,327 INFO L349 Elim1Store]: treesize reduction 67, result has 14.1 percent of original size [2024-11-13 16:02:57,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2024-11-13 16:02:57,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:02:57,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 59 [2024-11-13 16:02:57,872 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 16:02:57,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 16:02:58,202 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 43 treesize of output 31 [2024-11-13 16:02:59,823 INFO L349 Elim1Store]: treesize reduction 44, result has 58.1 percent of original size [2024-11-13 16:02:59,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 103 [2024-11-13 16:03:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 16:03:00,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:04,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:04,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 492 treesize of output 471 [2024-11-13 16:03:04,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 16:03:04,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 861 treesize of output 576 [2024-11-13 16:03:10,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-13 16:03:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 16:03:12,684 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 16:03:12,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256929868] [2024-11-13 16:03:12,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256929868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:03:12,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:03:12,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2024-11-13 16:03:12,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037394014] [2024-11-13 16:03:12,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:03:12,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-13 16:03:12,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 16:03:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-13 16:03:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1513, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 16:03:12,686 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 36 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 16:03:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:03:21,494 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2024-11-13 16:03:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 16:03:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 36 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2024-11-13 16:03:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:03:21,496 INFO L225 Difference]: With dead ends: 80 [2024-11-13 16:03:21,496 INFO L226 Difference]: Without dead ends: 77 [2024-11-13 16:03:21,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2024-11-13 16:03:21,498 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-13 16:03:21,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 485 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-13 16:03:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-13 16:03:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-11-13 16:03:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:03:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2024-11-13 16:03:21,533 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 42 [2024-11-13 16:03:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:03:21,533 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2024-11-13 16:03:21,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 36 states have internal predecessors, (58), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-13 16:03:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2024-11-13 16:03:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:03:21,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:03:21,535 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:03:21,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 16:03:21,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:21,736 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:03:21,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:03:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1470962530, now seen corresponding path program 3 times [2024-11-13 16:03:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 16:03:21,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067644624] [2024-11-13 16:03:21,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:03:21,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:03:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:03:21,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:03:21,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 16:03:22,561 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 16:03:22,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:22,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-13 16:03:22,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:22,688 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 7 [2024-11-13 16:03:23,077 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 [2024-11-13 16:03:23,105 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 [2024-11-13 16:03:24,324 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 16:03:24,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 16:03:24,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 16:03:24,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-13 16:03:24,675 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 23 treesize of output 22 [2024-11-13 16:03:24,784 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 27 treesize of output 15 [2024-11-13 16:03:25,911 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 16:03:25,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 29 [2024-11-13 16:03:25,931 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 19 treesize of output 11 [2024-11-13 16:03:25,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-13 16:03:30,600 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_node_create_~temp~0#1.base_155| (_ BitVec 32))) (and (= (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_155| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_155|)) |c_#memory_$Pointer$#1.offset|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_155|)) (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_155| (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_155|)) |c_#memory_$Pointer$#1.base|))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_19| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_19|) |v_ULTIMATE.start_sll_append_~head#1.offset_BEFORE_CALL_19|)))) is different from true [2024-11-13 16:03:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:30,828 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-13 16:03:30,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 53 [2024-11-13 16:03:30,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:30,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:30,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-13 16:03:31,015 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 16:03:31,015 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 32 treesize of output 34 [2024-11-13 16:03:31,561 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 16:03:31,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-13 16:03:32,379 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-13 16:03:32,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 22 [2024-11-13 16:03:32,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-13 16:03:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2024-11-13 16:03:32,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:03:34,907 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-13 16:03:34,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067644624] [2024-11-13 16:03:34,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067644624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:03:34,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1085480437] [2024-11-13 16:03:34,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:03:34,908 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 16:03:34,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 [2024-11-13 16:03:34,910 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 16:03:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-13 16:03:35,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 16:03:35,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:03:35,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-13 16:03:35,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:03:36,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-13 16:03:36,511 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 [2024-11-13 16:03:37,433 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 [2024-11-13 16:03:37,462 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 [2024-11-13 16:03:39,647 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 16:03:39,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 16:03:39,854 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 16:03:39,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-13 16:03:40,065 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 16:03:40,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 16:03:40,680 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 27 treesize of output 15 [2024-11-13 16:03:40,709 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 [2024-11-13 16:03:40,753 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 [2024-11-13 16:03:42,964 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-13 16:03:42,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 33 [2024-11-13 16:03:42,984 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 [2024-11-13 16:03:43,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-13 16:03:43,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-13 16:03:44,265 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_20| (_ BitVec 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_20|) (_ bv0 32)))) (exists ((|v_node_create_~temp~0#1.base_164| (_ BitVec 32))) (and (= (store |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_164| (store (store (select |c_old(#memory_$Pointer$#1.base)| |v_node_create_~temp~0#1.base_164|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) (select (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_164|) (_ bv0 32)))) |c_#memory_$Pointer$#1.base|) (= (store |c_old(#memory_$Pointer$#1.offset)| |v_node_create_~temp~0#1.base_164| (select |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_164|)) |c_#memory_$Pointer$#1.offset|) (= (_ bv0 1) (select |c_old(#valid)| |v_node_create_~temp~0#1.base_164|)) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |v_node_create_~temp~0#1.base_164| (select |c_#memory_int#1| |v_node_create_~temp~0#1.base_164|)))))) is different from true [2024-11-13 16:03:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:44,508 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-13 16:03:44,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 50 [2024-11-13 16:03:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:44,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:44,637 INFO L349 Elim1Store]: treesize reduction 6, result has 66.7 percent of original size [2024-11-13 16:03:44,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2024-11-13 16:03:44,658 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 24 treesize of output 19 [2024-11-13 16:03:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:03:44,685 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 [2024-11-13 16:03:51,132 INFO L349 Elim1Store]: treesize reduction 153, result has 23.5 percent of original size [2024-11-13 16:03:51,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 90 treesize of output 74 [2024-11-13 16:03:51,282 INFO L349 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2024-11-13 16:03:51,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2024-11-13 16:03:51,435 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 19 [2024-11-13 16:03:52,238 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 86 treesize of output 62 [2024-11-13 16:03:53,517 INFO L349 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2024-11-13 16:03:53,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 70 [2024-11-13 16:03:53,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-13 16:03:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-13 16:03:55,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:04:10,348 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1316 (_ BitVec 32)) (|ULTIMATE.start_sll_append_~new_last~0#1.base| (_ BitVec 32)) (v_ArrVal_1317 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_80| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|)))) (let ((.cse1 (select |c_#memory_$Pointer$#1.base| .cse0)) (.cse2 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_80| (_ bv4 32)))) (or (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store |c_#memory_int#1| .cse0 v_ArrVal_1317) (select (select (store |c_#memory_$Pointer$#1.base| .cse0 (store .cse1 .cse2 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) .cse3) .cse4)) (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 (store (select |c_#memory_$Pointer$#1.offset| .cse0) .cse2 v_ArrVal_1316)) .cse3) .cse4)))) (not (= (_ bv0 32) (select .cse1 .cse2))))))) is different from false [2024-11-13 16:04:12,366 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1316 (_ BitVec 32)) (|ULTIMATE.start_sll_append_~new_last~0#1.base| (_ BitVec 32)) (v_ArrVal_1317 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_80| (_ BitVec 32))) (let ((.cse2 (let ((.cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_sll_append_~last~0#1.offset|))) (select (select |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse5)) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse5)))))) (let ((.cse0 (select |c_#memory_$Pointer$#1.base| .cse2)) (.cse1 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_80| (_ bv4 32)))) (or (not (= (select .cse0 .cse1) (_ bv0 32))) (= (let ((.cse3 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store |c_#memory_int#1| .cse2 v_ArrVal_1317) (select (select (store |c_#memory_$Pointer$#1.base| .cse2 (store .cse0 .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) .cse3) .cse4)) (select (select (store |c_#memory_$Pointer$#1.offset| .cse2 (store (select |c_#memory_$Pointer$#1.offset| .cse2) .cse1 v_ArrVal_1316)) .cse3) .cse4))) |c_ULTIMATE.start_main_~data~0#1|))))) is different from false [2024-11-13 16:04:44,816 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1327 (_ BitVec 32)) (v_ArrVal_1316 (_ BitVec 32)) (|ULTIMATE.start_sll_append_~new_last~0#1.base| (_ BitVec 32)) (|v_node_create_~temp~0#1.base_170| (_ BitVec 32)) (v_ArrVal_1328 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1317 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1329 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_80| (_ BitVec 32))) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_170| (store (store (select |c_#memory_$Pointer$#1.base| |v_node_create_~temp~0#1.base_170|) (_ bv4 32) (_ bv0 32)) (_ bv0 32) v_ArrVal_1327))) (.cse6 (store |c_#memory_$Pointer$#1.offset| |v_node_create_~temp~0#1.base_170| v_ArrVal_1328))) (let ((.cse2 (let ((.cse7 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse8 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (select (select .cse3 (select (select .cse3 .cse7) .cse8)) (bvadd (_ bv4 32) (select (select .cse6 .cse7) .cse8)))))) (let ((.cse0 (select .cse3 .cse2)) (.cse1 (bvadd |v_ULTIMATE.start_sll_append_~last~0#1.offset_80| (_ bv4 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_node_create_~temp~0#1.base_170|))) (not (= (_ bv0 32) (select .cse0 .cse1))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse4 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int#1| |v_node_create_~temp~0#1.base_170| v_ArrVal_1329) .cse2 v_ArrVal_1317) (select (select (store .cse3 .cse2 (store .cse0 .cse1 |ULTIMATE.start_sll_append_~new_last~0#1.base|)) .cse4) .cse5)) (select (select (store .cse6 .cse2 (store (select .cse6 .cse2) .cse1 v_ArrVal_1316)) .cse4) .cse5))))))))) is different from false [2024-11-13 16:04:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1085480437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:04:44,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-13 16:04:44,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28] total 47 [2024-11-13 16:04:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941094127] [2024-11-13 16:04:44,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-13 16:04:44,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-13 16:04:44,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-13 16:04:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-13 16:04:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3105, Unknown=48, NotChecked=580, Total=3906 [2024-11-13 16:04:44,854 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 47 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 39 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:04:54,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:04:59,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:05:20,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-13 16:05:22,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:05:22,559 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2024-11-13 16:05:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-13 16:05:22,561 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 39 states have internal predecessors, (69), 6 states have call successors, (6), 5 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 42 [2024-11-13 16:05:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:05:22,562 INFO L225 Difference]: With dead ends: 83 [2024-11-13 16:05:22,562 INFO L226 Difference]: Without dead ends: 67 [2024-11-13 16:05:22,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 87.4s TimeCoverageRelationStatistics Valid=281, Invalid=5091, Unknown=50, NotChecked=740, Total=6162 [2024-11-13 16:05:22,564 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2024-11-13 16:05:22,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 398 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 874 Invalid, 3 Unknown, 108 Unchecked, 20.4s Time] [2024-11-13 16:05:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-13 16:05:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-13 16:05:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 56 states have internal predecessors, (62), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:05:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2024-11-13 16:05:22,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 42 [2024-11-13 16:05:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:05:22,596 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2024-11-13 16:05:22,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 39 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 16:05:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2024-11-13 16:05:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 16:05:22,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:05:22,597 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:05:22,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-13 16:05:22,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-13 16:05:22,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/cvc4 --incremental --print-success --lang smt [2024-11-13 16:05:22,998 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:05:22,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:05:22,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1086659751, now seen corresponding path program 4 times [2024-11-13 16:05:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-13 16:05:22,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999816385] [2024-11-13 16:05:22,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:05:22,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:05:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:05:23,001 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:05:23,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_434fc34b-fce3-4adc-aa04-d15d4730da69/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 16:05:23,247 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:05:23,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:05:23,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-13 16:05:23,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:05:23,271 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 7 [2024-11-13 16:05:24,333 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-11-13 16:05:24,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-11-13 16:05:24,565 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 15 treesize of output 1 [2024-11-13 16:05:24,582 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 [2024-11-13 16:05:25,684 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 32 treesize of output 16 [2024-11-13 16:05:25,709 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 [2024-11-13 16:05:25,734 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 19 treesize of output 11 [2024-11-13 16:05:26,989 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-13 16:05:26,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2024-11-13 16:05:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 16:05:27,042 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 50 treesize of output 34 [2024-11-13 16:05:27,180 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-13 16:05:27,180 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 32 treesize of output 34 [2024-11-13 16:05:30,226 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2024-11-13 16:05:30,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 93 [2024-11-13 16:05:30,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2024-11-13 16:05:30,825 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 116 treesize of output 80 [2024-11-13 16:05:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 16:05:34,727 INFO L311 TraceCheckSpWp]: Computing backward predicates...