./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme --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 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:05:46,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:05:46,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:05:46,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:05:46,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:05:46,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:05:46,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:05:46,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:05:46,274 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:05:46,275 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:05:46,276 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:05:46,276 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:05:46,277 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:05:46,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:05:46,279 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:05:46,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:05:46,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:05:46,281 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:05:46,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:05:46,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:05:46,282 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:05:46,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:05:46,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:05:46,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:05:46,285 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:05:46,286 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:05:46,286 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:05:46,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:05:46,288 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:05:46,288 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:05:46,289 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:05:46,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:46,290 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:05:46,290 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:05:46,291 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:05:46,291 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:05:46,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:05:46,292 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:05:46,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:05:46,293 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:05:46,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:05:46,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:05:46,295 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 724878768076b8192fcddec982755d081255c76c80e1e283d808e6a7ebb222b9 [2023-11-26 12:05:46,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:05:46,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:05:46,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:05:46,590 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:05:46,590 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:05:46,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2023-11-26 12:05:49,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:05:50,078 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:05:50,078 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i [2023-11-26 12:05:50,098 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/data/83f7a21a0/8e3ff61e96d9455892719afb3c90d548/FLAG7286c9cf5 [2023-11-26 12:05:50,117 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/data/83f7a21a0/8e3ff61e96d9455892719afb3c90d548 [2023-11-26 12:05:50,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:05:50,126 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:05:50,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:50,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:05:50,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:05:50,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614ab070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50, skipping insertion in model container [2023-11-26 12:05:50,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:05:50,633 WARN L240 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_35fc9c2e-550f-4e89-9622-48d991ea04ca/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2023-11-26 12:05:50,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:50,655 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:05:50,704 WARN L240 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_35fc9c2e-550f-4e89-9622-48d991ea04ca/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-1.i[24521,24534] [2023-11-26 12:05:50,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:05:50,739 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:05:50,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50 WrapperNode [2023-11-26 12:05:50,740 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:05:50,741 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:50,742 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:05:50,742 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:05:50,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,791 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 140 [2023-11-26 12:05:50,792 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:05:50,793 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:05:50,793 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:05:50,793 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:05:50,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,811 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,848 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 6, 5]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 4 writes are split as follows [0, 3, 1]. [2023-11-26 12:05:50,849 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,849 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,859 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,868 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,875 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:05:50,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:05:50,879 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:05:50,879 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:05:50,880 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (1/1) ... [2023-11-26 12:05:50,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:05:50,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:50,922 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:05:50,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:05:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-26 12:05:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-26 12:05:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 12:05:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-11-26 12:05:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-11-26 12:05:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:05:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 12:05:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 12:05:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 12:05:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 12:05:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 12:05:50,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 12:05:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 12:05:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 12:05:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 12:05:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 12:05:50,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 12:05:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:05:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 12:05:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 12:05:50,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:05:50,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:05:51,130 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:05:51,132 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:05:51,178 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-26 12:05:51,468 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:05:51,491 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:05:51,491 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 12:05:51,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:51 BoogieIcfgContainer [2023-11-26 12:05:51,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:05:51,516 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:05:51,516 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:05:51,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:05:51,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:50" (1/3) ... [2023-11-26 12:05:51,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449c2576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:51, skipping insertion in model container [2023-11-26 12:05:51,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:50" (2/3) ... [2023-11-26 12:05:51,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449c2576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:51, skipping insertion in model container [2023-11-26 12:05:51,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:51" (3/3) ... [2023-11-26 12:05:51,523 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2023-11-26 12:05:51,544 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:05:51,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:05:51,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:05:51,604 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@65bc6677, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:05:51,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:05:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 36 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-26 12:05:51,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:51,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:51,618 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:51,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1925725124, now seen corresponding path program 1 times [2023-11-26 12:05:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718154017] [2023-11-26 12:05:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:51,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:51,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 12:05:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-26 12:05:51,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:51,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718154017] [2023-11-26 12:05:51,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718154017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:51,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:51,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:05:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355222159] [2023-11-26 12:05:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:05:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:05:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:05:51,956 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 36 states have internal predecessors, (53), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:52,000 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2023-11-26 12:05:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:05:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-11-26 12:05:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:52,018 INFO L225 Difference]: With dead ends: 82 [2023-11-26 12:05:52,018 INFO L226 Difference]: Without dead ends: 34 [2023-11-26 12:05:52,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:05:52,035 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:52,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:05:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-26 12:05:52,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-26 12:05:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2023-11-26 12:05:52,083 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 21 [2023-11-26 12:05:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:52,084 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2023-11-26 12:05:52,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-26 12:05:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2023-11-26 12:05:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 12:05:52,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:52,087 INFO L195 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, 1] [2023-11-26 12:05:52,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 12:05:52,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:52,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1034308714, now seen corresponding path program 1 times [2023-11-26 12:05:52,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:52,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001664796] [2023-11-26 12:05:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:52,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:52,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-26 12:05:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001664796] [2023-11-26 12:05:52,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001664796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677824360] [2023-11-26 12:05:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:52,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:52,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:52,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:05:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:52,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:05:52,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:52,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:05:52,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677824360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:52,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:05:52,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-26 12:05:52,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125634750] [2023-11-26 12:05:52,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:52,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:05:52,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:53,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:05:53,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:05:53,001 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-11-26 12:05:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:53,095 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2023-11-26 12:05:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:05:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) Word has length 28 [2023-11-26 12:05:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:53,097 INFO L225 Difference]: With dead ends: 63 [2023-11-26 12:05:53,097 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 12:05:53,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:05:53,100 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:53,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 12:05:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-26 12:05:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-11-26 12:05:53,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 28 [2023-11-26 12:05:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:53,110 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-11-26 12:05:53,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2023-11-26 12:05:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-11-26 12:05:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 12:05:53,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:53,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:53,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 12:05:53,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 12:05:53,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:53,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1452360817, now seen corresponding path program 1 times [2023-11-26 12:05:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315849383] [2023-11-26 12:05:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:53,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 12:05:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 12:05:53,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:53,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315849383] [2023-11-26 12:05:53,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315849383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:53,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:53,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 12:05:53,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572526669] [2023-11-26 12:05:53,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:53,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 12:05:53,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 12:05:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 12:05:53,706 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 12:05:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:53,851 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2023-11-26 12:05:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 12:05:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2023-11-26 12:05:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:53,856 INFO L225 Difference]: With dead ends: 85 [2023-11-26 12:05:53,856 INFO L226 Difference]: Without dead ends: 61 [2023-11-26 12:05:53,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-26 12:05:53,861 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:53,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 162 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-26 12:05:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2023-11-26 12:05:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 12:05:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-26 12:05:53,886 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 32 [2023-11-26 12:05:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:53,887 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-26 12:05:53,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 12:05:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-26 12:05:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 12:05:53,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:53,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:53,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 12:05:53,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:53,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:53,891 INFO L85 PathProgramCache]: Analyzing trace with hash 322646545, now seen corresponding path program 1 times [2023-11-26 12:05:53,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:53,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16840917] [2023-11-26 12:05:53,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:53,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 12:05:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:05:54,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:54,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16840917] [2023-11-26 12:05:54,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16840917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:05:54,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:05:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 12:05:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644836138] [2023-11-26 12:05:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:05:54,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:05:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:54,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:05:54,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:05:54,044 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-11-26 12:05:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:54,138 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-11-26 12:05:54,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 12:05:54,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-26 12:05:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:54,141 INFO L225 Difference]: With dead ends: 71 [2023-11-26 12:05:54,141 INFO L226 Difference]: Without dead ends: 67 [2023-11-26 12:05:54,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:05:54,150 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 158 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-26 12:05:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2023-11-26 12:05:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 12:05:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-26 12:05:54,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 32 [2023-11-26 12:05:54,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:54,173 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-26 12:05:54,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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) [2023-11-26 12:05:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-26 12:05:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-26 12:05:54,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:54,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:54,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 12:05:54,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:54,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:54,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1412675870, now seen corresponding path program 1 times [2023-11-26 12:05:54,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:54,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834796688] [2023-11-26 12:05:54,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:54,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 12:05:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:54,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:54,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834796688] [2023-11-26 12:05:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834796688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879576322] [2023-11-26 12:05:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:54,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:54,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:54,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:54,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:05:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:54,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 12:05:54,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 12:05:54,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 12:05:54,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879576322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:54,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:54,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-26 12:05:54,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254965415] [2023-11-26 12:05:54,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:54,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 12:05:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 12:05:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-26 12:05:54,840 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 12:05:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:55,133 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2023-11-26 12:05:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 12:05:55,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2023-11-26 12:05:55,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:55,135 INFO L225 Difference]: With dead ends: 127 [2023-11-26 12:05:55,135 INFO L226 Difference]: Without dead ends: 76 [2023-11-26 12:05:55,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:05:55,137 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:55,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 256 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:05:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-26 12:05:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2023-11-26 12:05:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-26 12:05:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2023-11-26 12:05:55,165 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 33 [2023-11-26 12:05:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:55,165 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2023-11-26 12:05:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 12:05:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2023-11-26 12:05:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 12:05:55,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:55,167 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:55,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 12:05:55,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:55,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:55,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 756139205, now seen corresponding path program 2 times [2023-11-26 12:05:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:55,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921182962] [2023-11-26 12:05:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:05:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:55,748 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:05:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:55,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921182962] [2023-11-26 12:05:55,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921182962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:55,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927858389] [2023-11-26 12:05:55,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 12:05:55,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:55,750 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:55,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:05:55,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 12:05:55,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:55,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 12:05:55,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:55,963 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 [2023-11-26 12:05:56,208 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 [2023-11-26 12:05:56,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-26 12:05:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:05:56,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:56,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-26 12:05:56,292 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 21 treesize of output 13 [2023-11-26 12:05:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:05:56,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927858389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:56,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:56,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 13 [2023-11-26 12:05:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817318309] [2023-11-26 12:05:56,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 12:05:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 12:05:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-26 12:05:56,323 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:56,608 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2023-11-26 12:05:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 12:05:56,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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) Word has length 37 [2023-11-26 12:05:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:56,610 INFO L225 Difference]: With dead ends: 100 [2023-11-26 12:05:56,610 INFO L226 Difference]: Without dead ends: 96 [2023-11-26 12:05:56,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-26 12:05:56,611 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:56,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 346 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-26 12:05:56,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2023-11-26 12:05:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 69 states have internal predecessors, (86), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 12:05:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-11-26 12:05:56,632 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 37 [2023-11-26 12:05:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:56,632 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-11-26 12:05:56,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:05:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-11-26 12:05:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 12:05:56,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:56,635 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:56,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:05:56,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 12:05:56,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:56,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1966046442, now seen corresponding path program 3 times [2023-11-26 12:05:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:56,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112354825] [2023-11-26 12:05:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:57,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:57,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:05:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 12:05:57,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:57,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112354825] [2023-11-26 12:05:57,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112354825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:57,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842232236] [2023-11-26 12:05:57,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 12:05:57,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:57,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:57,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:57,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:05:57,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-26 12:05:57,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:57,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 12:05:57,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-26 12:05:57,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:05:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-26 12:05:57,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842232236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:05:57,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:05:57,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 24 [2023-11-26 12:05:57,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400368361] [2023-11-26 12:05:57,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:05:57,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:05:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:05:57,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:05:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:05:57,903 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 24 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 12:05:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:05:58,313 INFO L93 Difference]: Finished difference Result 163 states and 211 transitions. [2023-11-26 12:05:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 12:05:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-26 12:05:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:05:58,317 INFO L225 Difference]: With dead ends: 163 [2023-11-26 12:05:58,318 INFO L226 Difference]: Without dead ends: 159 [2023-11-26 12:05:58,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-26 12:05:58,320 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 58 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:05:58,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 505 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 12:05:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-26 12:05:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 101. [2023-11-26 12:05:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 91 states have internal predecessors, (111), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-26 12:05:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2023-11-26 12:05:58,359 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 38 [2023-11-26 12:05:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:05:58,360 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2023-11-26 12:05:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-26 12:05:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2023-11-26 12:05:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-26 12:05:58,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:05:58,366 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:05:58,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 12:05:58,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 12:05:58,577 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:05:58,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:05:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash 818465125, now seen corresponding path program 4 times [2023-11-26 12:05:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:05:58,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306489545] [2023-11-26 12:05:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:05:58,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:05:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:59,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:05:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:59,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:05:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:05:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:05:59,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:05:59,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306489545] [2023-11-26 12:05:59,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306489545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:05:59,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432280705] [2023-11-26 12:05:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 12:05:59,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:05:59,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:05:59,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:05:59,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:05:59,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 12:05:59,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 12:05:59,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-26 12:05:59,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:05:59,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 12:05:59,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:05:59,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-26 12:05:59,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 12:05:59,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-26 12:05:59,670 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 [2023-11-26 12:05:59,680 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 [2023-11-26 12:06:00,156 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 65 treesize of output 41 [2023-11-26 12:06:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 12:06:00,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:00,377 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 72 treesize of output 52 [2023-11-26 12:06:00,382 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 56 treesize of output 36 [2023-11-26 12:06:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 12:06:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432280705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:17,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:17,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2023-11-26 12:06:17,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454408829] [2023-11-26 12:06:17,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:06:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:17,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:06:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=401, Unknown=4, NotChecked=0, Total=462 [2023-11-26 12:06:17,100 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:06:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:17,709 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2023-11-26 12:06:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 12:06:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 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) Word has length 39 [2023-11-26 12:06:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:17,712 INFO L225 Difference]: With dead ends: 164 [2023-11-26 12:06:17,712 INFO L226 Difference]: Without dead ends: 151 [2023-11-26 12:06:17,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=85, Invalid=561, Unknown=4, NotChecked=0, Total=650 [2023-11-26 12:06:17,713 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:17,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 445 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:06:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-26 12:06:17,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2023-11-26 12:06:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 124 states have internal predecessors, (150), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-26 12:06:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 176 transitions. [2023-11-26 12:06:17,738 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 176 transitions. Word has length 39 [2023-11-26 12:06:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:17,738 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 176 transitions. [2023-11-26 12:06:17,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 12:06:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 176 transitions. [2023-11-26 12:06:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 12:06:17,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:17,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:17,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:17,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:17,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:17,954 INFO L85 PathProgramCache]: Analyzing trace with hash 160286352, now seen corresponding path program 1 times [2023-11-26 12:06:17,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:17,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259084340] [2023-11-26 12:06:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:18,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 12:06:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-26 12:06:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:18,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:06:18,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259084340] [2023-11-26 12:06:18,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259084340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:06:18,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952376085] [2023-11-26 12:06:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:18,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:06:18,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:06:18,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:06:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:06:18,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 12:06:18,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:06:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:19,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:06:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 12:06:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952376085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:06:19,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 12:06:19,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-11-26 12:06:19,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837959939] [2023-11-26 12:06:19,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 12:06:19,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 12:06:19,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:06:19,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 12:06:19,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-26 12:06:19,645 INFO L87 Difference]: Start difference. First operand 137 states and 176 transitions. Second operand has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 12:06:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:06:20,818 INFO L93 Difference]: Finished difference Result 302 states and 408 transitions. [2023-11-26 12:06:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 12:06:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2023-11-26 12:06:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:06:20,822 INFO L225 Difference]: With dead ends: 302 [2023-11-26 12:06:20,822 INFO L226 Difference]: Without dead ends: 217 [2023-11-26 12:06:20,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2023-11-26 12:06:20,824 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:06:20,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 542 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:06:20,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-26 12:06:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 158. [2023-11-26 12:06:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 139 states have (on average 1.2805755395683454) internal successors, (178), 144 states have internal predecessors, (178), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2023-11-26 12:06:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2023-11-26 12:06:20,856 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 41 [2023-11-26 12:06:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:06:20,857 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2023-11-26 12:06:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-26 12:06:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2023-11-26 12:06:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-26 12:06:20,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:06:20,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:20,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:06:21,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:06:21,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:06:21,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:06:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1119577326, now seen corresponding path program 1 times [2023-11-26 12:06:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:06:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826327958] [2023-11-26 12:06:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:06:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:06:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:06:21,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 12:06:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 12:06:21,123 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 12:06:21,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 12:06:21,124 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 12:06:21,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 12:06:21,129 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1] [2023-11-26 12:06:21,133 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 12:06:21,154 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated [2023-11-26 12:06:21,155 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated [2023-11-26 12:06:21,155 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret15 could not be translated [2023-11-26 12:06:21,156 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-11-26 12:06:21,156 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-11-26 12:06:21,157 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-11-26 12:06:21,157 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated [2023-11-26 12:06:21,158 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated [2023-11-26 12:06:21,158 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated [2023-11-26 12:06:21,158 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret17 could not be translated [2023-11-26 12:06:21,158 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short19 could not be translated [2023-11-26 12:06:21,159 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet18 could not be translated [2023-11-26 12:06:21,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:06:21 BoogieIcfgContainer [2023-11-26 12:06:21,173 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 12:06:21,174 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 12:06:21,174 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 12:06:21,174 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 12:06:21,175 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:51" (3/4) ... [2023-11-26 12:06:21,176 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 12:06:21,199 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated [2023-11-26 12:06:21,202 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated [2023-11-26 12:06:21,208 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret15 could not be translated [2023-11-26 12:06:21,208 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-11-26 12:06:21,209 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-11-26 12:06:21,209 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-11-26 12:06:21,210 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated [2023-11-26 12:06:21,210 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated [2023-11-26 12:06:21,210 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated [2023-11-26 12:06:21,210 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret17 could not be translated [2023-11-26 12:06:21,211 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short19 could not be translated [2023-11-26 12:06:21,211 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet18 could not be translated [2023-11-26 12:06:21,273 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 12:06:21,273 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 12:06:21,274 INFO L158 Benchmark]: Toolchain (without parser) took 31148.05ms. Allocated memory was 165.7MB in the beginning and 257.9MB in the end (delta: 92.3MB). Free memory was 116.9MB in the beginning and 198.7MB in the end (delta: -81.9MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,274 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 165.7MB. Free memory is still 136.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 12:06:21,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 612.98ms. Allocated memory is still 165.7MB. Free memory was 116.9MB in the beginning and 98.5MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,275 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.82ms. Allocated memory is still 165.7MB. Free memory was 98.5MB in the beginning and 96.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,275 INFO L158 Benchmark]: Boogie Preprocessor took 82.24ms. Allocated memory is still 165.7MB. Free memory was 96.2MB in the beginning and 93.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,276 INFO L158 Benchmark]: RCFGBuilder took 613.05ms. Allocated memory is still 165.7MB. Free memory was 93.3MB in the beginning and 131.1MB in the end (delta: -37.9MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,276 INFO L158 Benchmark]: TraceAbstraction took 29657.58ms. Allocated memory was 213.9MB in the beginning and 257.9MB in the end (delta: 44.0MB). Free memory was 183.2MB in the beginning and 201.9MB in the end (delta: -18.7MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,277 INFO L158 Benchmark]: Witness Printer took 98.92ms. Allocated memory is still 257.9MB. Free memory was 201.9MB in the beginning and 198.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 12:06:21,283 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 165.7MB. Free memory is still 136.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 612.98ms. Allocated memory is still 165.7MB. Free memory was 116.9MB in the beginning and 98.5MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.82ms. Allocated memory is still 165.7MB. Free memory was 98.5MB in the beginning and 96.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 82.24ms. Allocated memory is still 165.7MB. Free memory was 96.2MB in the beginning and 93.3MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 613.05ms. Allocated memory is still 165.7MB. Free memory was 93.3MB in the beginning and 131.1MB in the end (delta: -37.9MB). Peak memory consumption was 25.4MB. Max. memory is 16.1GB. * TraceAbstraction took 29657.58ms. Allocated memory was 213.9MB in the beginning and 257.9MB in the end (delta: 44.0MB). Free memory was 183.2MB in the beginning and 201.9MB in the end (delta: -18.7MB). Peak memory consumption was 25.3MB. Max. memory is 16.1GB. * Witness Printer took 98.92ms. Allocated memory is still 257.9MB. Free memory was 201.9MB in the beginning and 198.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret15 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret17 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short19 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet18 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret15 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet12 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret17 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short19 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet18 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 641]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L627] CALL, EXPR _get_nondet_int(2, 5) VAL [\old(from)=2, \old(until)=5] [L620] int len = from; VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=2, \old(until)=5, from=2, len=2, until=5] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; [L627] RET, EXPR _get_nondet_int(2, 5) [L627] const int len = _get_nondet_int(2, 5); [L628] SLL s = sll_create(len); [L628] CALL, EXPR sll_create(len) [L575] SLL head = ((void *)0); VAL [\old(len)=2, head={0:0}, len=2] [L576] EXPR len-- VAL [\old(len)=2, head={0:0}, len=1] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE, EXPR !(((void *)0) == new_head) VAL [\old(len)=2, head={0:0}, len=1, new_head={-1:0}] [L581] EXPR new_head->next = head [L582] EXPR head = new_head [L576-L583] { SLL new_head = (SLL) malloc(sizeof(struct node)); if(((void *)0) == new_head) { myexit(1); } new_head->next = head; head = new_head; } VAL [\old(len)=2, head={-1:0}, len=1] [L576] EXPR len-- VAL [\old(len)=2, head={-1:0}, len=0] [L576] COND TRUE len-- > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE, EXPR !(((void *)0) == new_head) VAL [\old(len)=2, head={-1:0}, len=0, new_head={-2:0}] [L581] EXPR new_head->next = head [L582] EXPR head = new_head [L576-L583] { SLL new_head = (SLL) malloc(sizeof(struct node)); if(((void *)0) == new_head) { myexit(1); } new_head->next = head; head = new_head; } VAL [\old(len)=2, head={-2:0}, len=0] [L576] EXPR len-- VAL [\old(len)=2, head={-2:0}, len=-1] [L576] COND FALSE !(len-- > 0) [L584] return head; [L628] RET, EXPR sll_create(len) [L628] SLL s = sll_create(len); [L629] CALL, EXPR _get_nondet_int(0, len - 1) VAL [\old(from)=0, \old(until)=1] [L620] int len = from; VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] len < until && __VERIFIER_nondet_int() [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=0, until=1] [L621] COND TRUE len < until && __VERIFIER_nondet_int() [L622] len++ VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] len < until && __VERIFIER_nondet_int() VAL [\old(from)=0, \old(until)=1, from=0, len=1, until=1] [L621] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L624] return len; [L629] RET, EXPR _get_nondet_int(0, len - 1) VAL [len=2, s={3:0}] [L629] const int k = _get_nondet_int(0, len - 1); [L630] int i = 0; VAL [i=0, k=1, len=2, s={3:0}] [L631] i < k && __VERIFIER_nondet_int() [L631] i < k && __VERIFIER_nondet_int() VAL [i=0, k=1, len=2, s={3:0}] [L631] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L636] EXPR \read(s) [L636] CALL, EXPR sll_length(s) [L587] int len = 0; VAL [head={-2:0}, head={-2:0}, len=0] [L588] COND TRUE \read(head) [L589] len++ [L590] EXPR head->next [L590] head = head->next [L588] COND TRUE \read(head) [L589] len++ [L590] EXPR head->next [L590] head = head->next [L588] COND FALSE !(\read(head)) VAL [head={-2:0}, head={0:0}, len=2] [L592] return len; [L636] RET, EXPR sll_length(s) [L636] COND TRUE k + len != sll_length(s) [L641] reach_error() VAL [i=0, k=1, len=2, s={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.6s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 318 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 308 mSDsluCounter, 2637 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2313 mSDsCounter, 60 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1652 IncrementalHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 60 mSolverCounterUnsat, 324 mSDtfsCounter, 1652 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 390 SyntacticMatches, 8 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 19.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=9, InterpolantAutomatonStates: 99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 185 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 23.3s InterpolantComputationTime, 558 NumberOfCodeBlocks, 550 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 685 ConstructedInterpolants, 17 QuantifiedInterpolants, 4889 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1113 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 166/284 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-26 12:06:21,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35fc9c2e-550f-4e89-9622-48d991ea04ca/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE