./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all.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_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/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_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/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_842ae98c-6cf5-4a6b-b881-a4e672594d88/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 b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:08,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:08,491 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:47:08,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:08,501 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:08,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:08,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:08,551 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:08,552 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:08,557 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:08,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:08,559 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:08,560 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:08,561 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:08,562 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:08,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:08,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:47:08,563 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:08,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:08,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:08,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:08,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:47:08,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:08,567 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:47:08,567 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:08,568 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:47:08,568 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:08,569 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:08,569 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:08,570 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:08,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:08,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:08,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:08,573 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:08,573 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:47:08,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:08,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:08,574 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:08,574 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:08,574 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:47:08,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:08,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:08,576 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_842ae98c-6cf5-4a6b-b881-a4e672594d88/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 [2023-11-26 11:47:08,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:08,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:08,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:08,953 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:08,954 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:08,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2023-11-26 11:47:12,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:12,357 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:12,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2023-11-26 11:47:12,377 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/data/7225e2d43/6514e2174f364f1791f00dcd52f03841/FLAGe4bf31ea8 [2023-11-26 11:47:12,393 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/data/7225e2d43/6514e2174f364f1791f00dcd52f03841 [2023-11-26 11:47:12,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:12,398 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:12,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:12,399 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:12,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:12,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:12,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71503dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12, skipping insertion in model container [2023-11-26 11:47:12,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:12,458 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:12,834 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_842ae98c-6cf5-4a6b-b881-a4e672594d88/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2023-11-26 11:47:12,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:12,856 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:12,939 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_842ae98c-6cf5-4a6b-b881-a4e672594d88/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2023-11-26 11:47:12,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:12,975 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:12,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12 WrapperNode [2023-11-26 11:47:12,976 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:12,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:12,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:12,978 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:12,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,001 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,032 INFO L138 Inliner]: procedures = 126, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2023-11-26 11:47:13,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:13,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:13,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:13,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:13,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,049 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,067 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 6 writes are split as follows [0, 5, 1]. [2023-11-26 11:47:13,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:13,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:13,091 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:13,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:13,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (1/1) ... [2023-11-26 11:47:13,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:13,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:13,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:13,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-26 11:47:13,199 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-26 11:47:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:47:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:47:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:47:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:47:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:47:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:47:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:47:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:47:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:47:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:47:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:47:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:47:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:47:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:47:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:13,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:13,349 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:13,352 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:13,396 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-26 11:47:13,559 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:13,591 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:13,592 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:47:13,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:13 BoogieIcfgContainer [2023-11-26 11:47:13,592 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:13,595 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:13,595 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:13,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:13,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:12" (1/3) ... [2023-11-26 11:47:13,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c11de6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:13, skipping insertion in model container [2023-11-26 11:47:13,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:12" (2/3) ... [2023-11-26 11:47:13,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c11de6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:13, skipping insertion in model container [2023-11-26 11:47:13,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:13" (3/3) ... [2023-11-26 11:47:13,602 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2023-11-26 11:47:13,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:13,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:47:13,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:13,690 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;@c124eab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:13,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:47:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:47:13,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:13,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:13,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:13,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash -282809828, now seen corresponding path program 1 times [2023-11-26 11:47:13,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:13,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848013421] [2023-11-26 11:47:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:13,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:13,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:13,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848013421] [2023-11-26 11:47:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848013421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:13,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:13,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660399553] [2023-11-26 11:47:13,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:13,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:47:13,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:14,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:47:14,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:47:14,019 INFO L87 Difference]: Start difference. First operand has 19 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:14,055 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-26 11:47:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:47:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 11:47:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:14,066 INFO L225 Difference]: With dead ends: 29 [2023-11-26 11:47:14,066 INFO L226 Difference]: Without dead ends: 14 [2023-11-26 11:47:14,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 11:47:14,073 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:14,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-26 11:47:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-26 11:47:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-26 11:47:14,110 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 7 [2023-11-26 11:47:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:14,111 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-26 11:47:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-26 11:47:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-26 11:47:14,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:14,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:14,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:14,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:14,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:14,114 INFO L85 PathProgramCache]: Analyzing trace with hash -827210562, now seen corresponding path program 1 times [2023-11-26 11:47:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:14,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944107237] [2023-11-26 11:47:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944107237] [2023-11-26 11:47:14,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944107237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:14,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:14,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951746228] [2023-11-26 11:47:14,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:14,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:14,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:14,247 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:14,275 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-11-26 11:47:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-26 11:47:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:14,276 INFO L225 Difference]: With dead ends: 27 [2023-11-26 11:47:14,276 INFO L226 Difference]: Without dead ends: 19 [2023-11-26 11:47:14,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:14,279 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:14,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-26 11:47:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2023-11-26 11:47:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-26 11:47:14,285 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-11-26 11:47:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:14,285 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-26 11:47:14,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-26 11:47:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:47:14,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:14,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:14,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:47:14,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:14,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -741965758, now seen corresponding path program 1 times [2023-11-26 11:47:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:14,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332015735] [2023-11-26 11:47:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332015735] [2023-11-26 11:47:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332015735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:14,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:14,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806591351] [2023-11-26 11:47:14,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:14,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:14,415 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:14,448 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-11-26 11:47:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 11:47:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:14,450 INFO L225 Difference]: With dead ends: 32 [2023-11-26 11:47:14,450 INFO L226 Difference]: Without dead ends: 19 [2023-11-26 11:47:14,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:14,452 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:14,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-26 11:47:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-11-26 11:47:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-26 11:47:14,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2023-11-26 11:47:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:14,460 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-26 11:47:14,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-26 11:47:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-26 11:47:14,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:14,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:47:14,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:14,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1551312384, now seen corresponding path program 1 times [2023-11-26 11:47:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:14,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722925629] [2023-11-26 11:47:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:14,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:14,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722925629] [2023-11-26 11:47:14,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722925629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:14,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532472429] [2023-11-26 11:47:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:14,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:14,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:14,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:14,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:14,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:47:14,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:15,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:15,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532472429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:15,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:15,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-26 11:47:15,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569028597] [2023-11-26 11:47:15,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:15,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:47:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:47:15,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:15,080 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:15,133 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-26 11:47:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-26 11:47:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:15,138 INFO L225 Difference]: With dead ends: 28 [2023-11-26 11:47:15,138 INFO L226 Difference]: Without dead ends: 20 [2023-11-26 11:47:15,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:15,145 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:15,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-26 11:47:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-26 11:47:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-26 11:47:15,152 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2023-11-26 11:47:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:15,153 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-26 11:47:15,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-26 11:47:15,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:47:15,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:15,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:15,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:15,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:15,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:15,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1280023488, now seen corresponding path program 1 times [2023-11-26 11:47:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:15,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28946877] [2023-11-26 11:47:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:15,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:47:15,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:15,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28946877] [2023-11-26 11:47:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28946877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:15,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:15,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:47:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911574538] [2023-11-26 11:47:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:15,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:15,542 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:15,585 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-26 11:47:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-26 11:47:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:15,588 INFO L225 Difference]: With dead ends: 27 [2023-11-26 11:47:15,588 INFO L226 Difference]: Without dead ends: 23 [2023-11-26 11:47:15,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:47:15,591 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:15,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-26 11:47:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-26 11:47:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-26 11:47:15,603 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2023-11-26 11:47:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:15,607 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-26 11:47:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-26 11:47:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 11:47:15,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:15,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:15,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:47:15,611 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:15,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1016345580, now seen corresponding path program 1 times [2023-11-26 11:47:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:15,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194228488] [2023-11-26 11:47:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:15,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:47:15,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194228488] [2023-11-26 11:47:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194228488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036070666] [2023-11-26 11:47:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:15,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:15,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:15,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:15,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:47:15,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:47:16,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:47:16,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036070666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:16,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:16,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-11-26 11:47:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23083658] [2023-11-26 11:47:16,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:16,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:16,080 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:16,117 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-26 11:47:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:16,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-26 11:47:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:16,119 INFO L225 Difference]: With dead ends: 28 [2023-11-26 11:47:16,119 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 11:47:16,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:16,120 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:16,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 11:47:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 11:47:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-26 11:47:16,126 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2023-11-26 11:47:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:16,126 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-26 11:47:16,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-26 11:47:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:47:16,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:16,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:16,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:47:16,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:16,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1282972736, now seen corresponding path program 2 times [2023-11-26 11:47:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043279927] [2023-11-26 11:47:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:16,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:19,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043279927] [2023-11-26 11:47:19,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043279927] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:19,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368770348] [2023-11-26 11:47:19,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:19,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:19,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:19,319 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:19,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:19,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:19,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-26 11:47:19,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:19,576 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 11:47:19,665 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 14 treesize of output 15 [2023-11-26 11:47:19,676 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 14 treesize of output 15 [2023-11-26 11:47:19,907 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:47:19,907 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 11:47:20,044 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 27 [2023-11-26 11:47:20,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2023-11-26 11:47:20,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 17 [2023-11-26 11:47:20,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-26 11:47:20,263 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-26 11:47:20,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 70 [2023-11-26 11:47:20,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 49 [2023-11-26 11:47:20,947 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:47:20,948 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:47:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:20,950 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:47:20,969 INFO L349 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2023-11-26 11:47:20,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 59 [2023-11-26 11:47:20,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:47:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-26 11:47:21,002 INFO L349 Elim1Store]: treesize reduction 76, result has 12.6 percent of original size [2023-11-26 11:47:21,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 105 treesize of output 77 [2023-11-26 11:47:21,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 74 [2023-11-26 11:47:21,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 11:47:21,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-11-26 11:47:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:21,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:21,675 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 84 treesize of output 64 [2023-11-26 11:47:21,679 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 68 treesize of output 48 [2023-11-26 11:47:21,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:21,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 106 [2023-11-26 11:47:21,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:21,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 86 [2023-11-26 11:47:21,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:21,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 106 [2023-11-26 11:47:22,000 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:22,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 86 [2023-11-26 11:47:22,043 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 8 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|)) (.cse4 (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 8)) (.cse1 (+ |c_ULTIMATE.start_dll_create_~new_head~0#1.offset| 4))) (and (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int))) (or (not (= 0 (select v_arrayElimArr_2 .cse0))) (not (= (select v_arrayElimArr_3 .cse1) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= (select v_arrayElimArr_2 .cse1) |c_ULTIMATE.start_dll_create_~head~0#1.offset|)) (= (let ((.cse2 (let ((.cse5 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_2))) (store .cse5 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse4 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))))) (select (select .cse2 (select (select (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_3))) (store .cse3 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse4 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1)) (+ (select (select .cse2 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) 4))) 0) (not (= (select v_arrayElimArr_3 .cse0) 0)))) (forall ((v_arrayElimArr_5 (Array Int Int)) (v_arrayElimArr_4 (Array Int Int))) (or (not (= (select v_arrayElimArr_4 .cse1) |c_ULTIMATE.start_dll_create_~head~0#1.base|)) (not (= (select v_arrayElimArr_5 .cse0) 0)) (not (= (select v_arrayElimArr_4 .cse0) 0)) (not (= |c_ULTIMATE.start_dll_create_~head~0#1.offset| (select v_arrayElimArr_5 .cse1))) (= (select (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_4))) (store .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse4 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|))))) (select .cse6 (select (select .cse6 |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1))) (+ (select (select (let ((.cse8 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_create_~new_head~0#1.base| v_arrayElimArr_5))) (store .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_create_~head~0#1.base|) .cse4 |c_ULTIMATE.start_dll_create_~new_head~0#1.offset|))) |c_ULTIMATE.start_dll_create_~new_head~0#1.base|) .cse1) 4)) 0))))) is different from false [2023-11-26 11:47:23,683 INFO L349 Elim1Store]: treesize reduction 651, result has 11.1 percent of original size [2023-11-26 11:47:23,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 585 treesize of output 450 [2023-11-26 11:47:23,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:23,727 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 449 treesize of output 409 [2023-11-26 11:47:23,790 INFO L349 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2023-11-26 11:47:23,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 715 treesize of output 688 [2023-11-26 11:47:23,851 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 422 treesize of output 410 [2023-11-26 11:47:23,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 348 [2023-11-26 11:47:23,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:23,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 506 treesize of output 478 [2023-11-26 11:47:24,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-26 11:47:24,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:47:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:47:24,316 INFO L349 Elim1Store]: treesize reduction 473, result has 15.8 percent of original size [2023-11-26 11:47:24,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 836 treesize of output 726 [2023-11-26 11:47:24,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:24,360 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 821 treesize of output 646 [2023-11-26 11:47:24,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:24,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 614 treesize of output 572 [2023-11-26 11:47:24,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:24,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 500 treesize of output 472 [2023-11-26 11:47:24,587 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 300 treesize of output 282 [2023-11-26 11:47:24,661 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:24,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 78 [2023-11-26 11:47:24,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 246 [2023-11-26 11:47:24,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-11-26 11:47:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:47:25,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368770348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:25,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:25,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2023-11-26 11:47:25,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555199725] [2023-11-26 11:47:25,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:25,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-26 11:47:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-26 11:47:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1142, Unknown=2, NotChecked=68, Total=1332 [2023-11-26 11:47:25,228 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:27,499 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2023-11-26 11:47:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-26 11:47:27,500 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 11:47:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:27,503 INFO L225 Difference]: With dead ends: 69 [2023-11-26 11:47:27,503 INFO L226 Difference]: Without dead ends: 62 [2023-11-26 11:47:27,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=245, Invalid=2013, Unknown=2, NotChecked=92, Total=2352 [2023-11-26 11:47:27,505 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:27,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 212 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 550 Invalid, 0 Unknown, 56 Unchecked, 1.1s Time] [2023-11-26 11:47:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-26 11:47:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 40. [2023-11-26 11:47:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-11-26 11:47:27,514 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2023-11-26 11:47:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:27,515 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-11-26 11:47:27,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-11-26 11:47:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-26 11:47:27,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:27,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:27,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:47:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:47:27,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:27,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1225714434, now seen corresponding path program 1 times [2023-11-26 11:47:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461268635] [2023-11-26 11:47:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:47:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461268635] [2023-11-26 11:47:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461268635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:27,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:47:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059528582] [2023-11-26 11:47:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:27,980 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:28,071 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-11-26 11:47:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:47:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-26 11:47:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:28,072 INFO L225 Difference]: With dead ends: 51 [2023-11-26 11:47:28,073 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 11:47:28,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:28,074 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:28,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 61 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 11:47:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-11-26 11:47:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-26 11:47:28,082 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2023-11-26 11:47:28,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:28,082 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-26 11:47:28,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,082 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-26 11:47:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-26 11:47:28,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:28,084 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:28,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:47:28,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:28,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:28,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1996978838, now seen corresponding path program 2 times [2023-11-26 11:47:28,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:28,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124828163] [2023-11-26 11:47:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:47:28,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:28,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124828163] [2023-11-26 11:47:28,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124828163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760265622] [2023-11-26 11:47:28,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:28,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:28,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:28,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:47:28,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:28,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:28,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:47:28,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:47:28,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:28,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760265622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:28,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:47:28,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-26 11:47:28,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823887442] [2023-11-26 11:47:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:28,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:47:28,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:47:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:47:28,466 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:28,512 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2023-11-26 11:47:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:47:28,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-26 11:47:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:28,514 INFO L225 Difference]: With dead ends: 46 [2023-11-26 11:47:28,514 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 11:47:28,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:47:28,517 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:28,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 11:47:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-26 11:47:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-26 11:47:28,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2023-11-26 11:47:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:28,527 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-26 11:47:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-26 11:47:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:47:28,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:28,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:28,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:28,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:28,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:28,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash 436924800, now seen corresponding path program 3 times [2023-11-26 11:47:28,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:28,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469618892] [2023-11-26 11:47:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:28,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:47:28,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:28,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469618892] [2023-11-26 11:47:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469618892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:28,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451641984] [2023-11-26 11:47:28,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:28,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:28,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:28,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:28,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:47:29,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 11:47:29,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:29,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:47:30,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:47:30,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451641984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:30,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:47:30,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-26 11:47:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333065931] [2023-11-26 11:47:30,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:30,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:47:30,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:47:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:30,031 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:30,046 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-11-26 11:47:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-26 11:47:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:30,047 INFO L225 Difference]: With dead ends: 29 [2023-11-26 11:47:30,047 INFO L226 Difference]: Without dead ends: 0 [2023-11-26 11:47:30,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:47:30,049 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:30,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 17 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-26 11:47:30,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-26 11:47:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-26 11:47:30,052 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2023-11-26 11:47:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:30,052 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-26 11:47:30,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:47:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-26 11:47:30,053 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-26 11:47:30,055 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-26 11:47:30,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:47:30,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:47:30,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-26 11:47:30,574 INFO L899 garLoopResultBuilder]: For program point L573(line 573) no Hoare annotation was computed. [2023-11-26 11:47:30,574 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 572 574) the Hoare annotation is: true [2023-11-26 11:47:30,574 INFO L899 garLoopResultBuilder]: For program point myexitEXIT(lines 572 574) no Hoare annotation was computed. [2023-11-26 11:47:30,574 INFO L899 garLoopResultBuilder]: For program point L605(lines 605 607) no Hoare annotation was computed. [2023-11-26 11:47:30,574 INFO L899 garLoopResultBuilder]: For program point L605-2(lines 605 607) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point L589(lines 589 591) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point L589-1(lines 589 591) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 611 625) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 623) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L902 garLoopResultBuilder]: At program point L590(line 590) the Hoare annotation is: true [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point L619(lines 619 621) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-26 11:47:30,575 INFO L899 garLoopResultBuilder]: For program point L595(lines 595 597) no Hoare annotation was computed. [2023-11-26 11:47:30,576 INFO L899 garLoopResultBuilder]: For program point L595-2(lines 595 597) no Hoare annotation was computed. [2023-11-26 11:47:30,576 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-26 11:47:30,576 INFO L895 garLoopResultBuilder]: At program point L587-2(lines 587 600) the Hoare annotation is: (let ((.cse6 (select |#memory_$Pointer$#1.base| |ULTIMATE.start_dll_create_~head~0#1.base|)) (.cse5 (select |#memory_$Pointer$#1.offset| |ULTIMATE.start_dll_create_~head~0#1.base|))) (let ((.cse0 (= (select .cse5 4) 0)) (.cse1 (select .cse6 4)) (.cse4 (= |ULTIMATE.start_main_~#s~0#1.offset| 0)) (.cse2 (= |ULTIMATE.start_main_~len~0#1| 2)) (.cse3 (= |ULTIMATE.start_dll_create_~head~0#1.offset| 0))) (or (and .cse0 (= (select (select |#memory_$Pointer$#1.base| .cse1) 4) 0) (<= |ULTIMATE.start_dll_create_~len#1| 0) (= (select (select |#memory_$Pointer$#1.offset| .cse1) 4) 0) .cse2 .cse3) (and (= 2 |ULTIMATE.start_dll_create_~len#1|) .cse4 .cse2 .cse3 (= |ULTIMATE.start_dll_create_~head~0#1.base| 0)) (and .cse0 (= (select |#valid| |ULTIMATE.start_dll_create_~head~0#1.base|) 1) (= (select .cse5 8) 0) (= .cse1 0) (= (select .cse6 8) 0) .cse4 .cse2 (= |ULTIMATE.start_dll_create_~len#1| 1) .cse3)))) [2023-11-26 11:47:30,576 INFO L899 garLoopResultBuilder]: For program point L587-3(lines 587 600) no Hoare annotation was computed. [2023-11-26 11:47:30,576 INFO L895 garLoopResultBuilder]: At program point L616-3(lines 616 618) the Hoare annotation is: (let ((.cse7 (select (select |#memory_$Pointer$#2.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse8 (select (select |#memory_$Pointer$#2.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse0 (= .cse8 0)) (.cse1 (= .cse7 0)) (.cse5 (select |#memory_$Pointer$#1.base| .cse8)) (.cse3 (select |#memory_$Pointer$#1.offset| .cse8)) (.cse2 (= |ULTIMATE.start_main_~len~0#1| 2))) (or (and (<= (+ |ULTIMATE.start_main_~i~0#1| 1) 0) .cse0 .cse1 .cse2) (let ((.cse4 (select .cse5 4))) (and (= |ULTIMATE.start_main_~i~0#1| 1) (= (select .cse3 4) 0) .cse1 (= (select (select |#memory_$Pointer$#1.offset| .cse4) 4) 0) .cse2 (= (select (select |#memory_$Pointer$#1.base| .cse4) 4) 0))) (and (= (select (select |#memory_$Pointer$#1.offset| 0) 4) 0) (= (select (select |#memory_$Pointer$#1.base| 0) 4) 0) .cse0 .cse1 .cse2) (let ((.cse6 (+ .cse7 4))) (and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select .cse5 .cse6) 0) (= (select .cse3 .cse6) 0) .cse2))))) [2023-11-26 11:47:30,576 INFO L899 garLoopResultBuilder]: For program point L616-4(lines 616 618) no Hoare annotation was computed. [2023-11-26 11:47:30,577 INFO L899 garLoopResultBuilder]: For program point main_ERROR#1(lines 611 625) no Hoare annotation was computed. [2023-11-26 11:47:30,580 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2023-11-26 11:47:30,583 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:47:30,596 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset] could not be translated [2023-11-26 11:47:30,597 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] could not be translated [2023-11-26 11:47:30,597 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][4] could not be translated [2023-11-26 11:47:30,598 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] could not be translated [2023-11-26 11:47:30,598 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#1.base[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][4]][4] could not be translated [2023-11-26 11:47:30,598 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[#memory_$Pointer$#1.base[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][4]][4] could not be translated [2023-11-26 11:47:30,598 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[0][4] could not be translated [2023-11-26 11:47:30,599 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[0][4] could not be translated [2023-11-26 11:47:30,599 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset] could not be translated [2023-11-26 11:47:30,599 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] could not be translated [2023-11-26 11:47:30,599 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][#memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] + 4] could not be translated [2023-11-26 11:47:30,600 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][#memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] + 4] could not be translated [2023-11-26 11:47:30,602 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[~head~0!base][4] could not be translated [2023-11-26 11:47:30,602 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[#memory_$Pointer$#1.base[~head~0!base][4]][4] could not be translated [2023-11-26 11:47:30,603 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#1.base[~head~0!base][4]][4] could not be translated [2023-11-26 11:47:30,603 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[~head~0!base][4] could not be translated [2023-11-26 11:47:30,603 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #valid[~head~0!base] could not be translated [2023-11-26 11:47:30,603 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[~head~0!base][8] could not be translated [2023-11-26 11:47:30,604 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[~head~0!base][4] could not be translated [2023-11-26 11:47:30,604 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[~head~0!base][8] could not be translated [2023-11-26 11:47:30,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:47:30 BoogieIcfgContainer [2023-11-26 11:47:30,605 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:47:30,605 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:47:30,606 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:47:30,606 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:47:30,607 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:13" (3/4) ... [2023-11-26 11:47:30,609 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-26 11:47:30,613 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2023-11-26 11:47:30,623 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-26 11:47:30,624 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-26 11:47:30,624 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-26 11:47:30,624 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-26 11:47:30,753 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:47:30,755 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/bin/uautomizer-verify-VRDe98Ueme/witness.yml [2023-11-26 11:47:30,755 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:47:30,756 INFO L158 Benchmark]: Toolchain (without parser) took 18357.94ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 122.1MB in the beginning and 81.0MB in the end (delta: 41.1MB). Peak memory consumption was 108.9MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,756 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 125.8MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:47:30,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 577.49ms. Allocated memory is still 155.2MB. Free memory was 121.4MB in the beginning and 104.0MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,757 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.69ms. Allocated memory is still 155.2MB. Free memory was 104.0MB in the beginning and 101.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,758 INFO L158 Benchmark]: Boogie Preprocessor took 55.92ms. Allocated memory is still 155.2MB. Free memory was 101.9MB in the beginning and 99.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,759 INFO L158 Benchmark]: RCFGBuilder took 502.22ms. Allocated memory is still 155.2MB. Free memory was 99.1MB in the beginning and 109.7MB in the end (delta: -10.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,759 INFO L158 Benchmark]: TraceAbstraction took 17010.04ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 108.9MB in the beginning and 86.3MB in the end (delta: 22.7MB). Peak memory consumption was 94.4MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,760 INFO L158 Benchmark]: Witness Printer took 149.47ms. Allocated memory is still 224.4MB. Free memory was 86.3MB in the beginning and 81.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 11:47:30,763 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 125.8MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 577.49ms. Allocated memory is still 155.2MB. Free memory was 121.4MB in the beginning and 104.0MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.69ms. Allocated memory is still 155.2MB. Free memory was 104.0MB in the beginning and 101.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.92ms. Allocated memory is still 155.2MB. Free memory was 101.9MB in the beginning and 99.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 502.22ms. Allocated memory is still 155.2MB. Free memory was 99.1MB in the beginning and 109.7MB in the end (delta: -10.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 17010.04ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 108.9MB in the beginning and 86.3MB in the end (delta: 22.7MB). Peak memory consumption was 94.4MB. Max. memory is 16.1GB. * Witness Printer took 149.47ms. Allocated memory is still 224.4MB. Free memory was 86.3MB in the beginning and 81.0MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#1.base[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][4]][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[#memory_$Pointer$#1.base[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][4]][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[0][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[0][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][#memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] + 4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#2.base[~#s~0!base][~#s~0!offset]][#memory_$Pointer$#2.offset[~#s~0!base][~#s~0!offset] + 4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[~head~0!base][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[#memory_$Pointer$#1.base[~head~0!base][4]][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[#memory_$Pointer$#1.base[~head~0!base][4]][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[~head~0!base][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #valid[~head~0!base] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.offset[~head~0!base][8] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[~head~0!base][4] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_$Pointer$#1.base[~head~0!base][8] could not be translated * 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 - PositiveResult [Line: 623]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.9s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 114 mSDsluCounter, 494 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 56 IncrementalHoareTripleChecker+Unchecked, 367 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 676 IncrementalHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 127 mSDtfsCounter, 676 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 224 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 36 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 12 NumberOfFragments, 256 HoareAnnotationTreeSize, 4 FomulaSimplifications, 89 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 361 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 321 ConstructedInterpolants, 9 QuantifiedInterpolants, 3985 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1235 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 124/167 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 616]: Loop Invariant Derived loop invariant: ((((((i + 1) <= 0) && (len == 2)) || ((i == 1) && (len == 2))) || (len == 2)) || ((i == 0) && (len == 2))) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: ((((len <= 0) && (len == 2)) || ((2 == len) && (len == 2))) || ((len == 2) && (len == 1))) RESULT: Ultimate proved your program to be correct! [2023-11-26 11:47:30,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_842ae98c-6cf5-4a6b-b881-a4e672594d88/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 Result: TRUE